$ 199,504

$ 361,777

181,960

70,328

14,536

11,266

374

480

1,221

689

Due from related parties

1,097

13,593

13,068

412,285

457,653

Long-term investments

40,792

11,319

Property and equipment, net

3,272

8,593

21,016

18,036

10,746

13,433

Other long-term prepayments and receivables

20,497

21,896

1,187

7,431

509,795

538,361

Accounts payable (including accounts payable of the consolidated variable interest entities (“VIE”)and its subsidiaries without recourse to the Company of USD 33,262 and USD 44,162 as of December 31, 2015 and 2016, respectively)

33,376

21,736

Deferred revenue and income, current portion (including deferred revenue and income, current portion of the consolidated VIE and its subsidiaries without recourse to the Company of USD 24,902 and USD 24,260 as of December 31, 2015 and 2016, respectively)

24,532

25,113

Income tax payable (including income tax payable of the consolidated VIE and its subsidiaries without recourse to the Company of USD 2,407 and USD 2,253 as of December 31, 2015 and 2016, respectively)

2,321

2,470

Accrued liabilities and other payables (including accrued liabilities and other payables of the consolidated VIE and its subsidiaries without recourse to the Company of USD 131,312 and USD 104,114 as of December 31, 2015 and 2016, respectively)

33,131

27,379

93,405

76,736

Deferred revenue and income, non-current portion (including deferred revenue and income, non-current portion of the consolidated VIE and its subsidiaries without recourse to the Company of USD 4,751 and USD 3,539 as of December 31, 2015 and 2016, respectively)

^[1]

4,082

5,383

Deferred tax liabilities, non-current portion

635

6,378

4,537

4,337

Other long-term payable

886

846

103,545

93,680

Common shares ( USD0.00025 par value, 1,000,000,000 shares authorized, 368,877,209 shares issued and 339,319,115 shares outstanding as at December 31, 2015; 368,877,209 shares issued and 330,545,000 shares outstanding as at December 31, 2016)

Equity

Additional paid-in-capital

453,347

458,270

Accumulated other comprehensive loss

(13,629)

(4,152)

Statutory reserves

5,132

Treasury shares (29,558,094 shares and 38,332,209 shares as at December 31, 2015 and 2016, respectively)

Accumulated deficits

(36,704)

(12,593)

Total Xunlei Limited’s shareholders’ equity

408,238

446,749

Non-controlling interest

(1,988)

(2,068)

Total liabilities and shareholders’ equity

$ 509,795

$ 538,361

[1]	As of December 31, 2016, the non-current portion included membership subscription revenue of USD 820 thousand (2015: USD719 th0usand), government grants of USD2,719 thousand (2015: USD4,032 thousand), and reimbursement from the depositary of USD543 thousand (2015: USD632 thousand).

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts payable, consolidated variable interest entities and VIE's subsidiaries without recourse	$ 44,162	$ 33,262
Due to related party, consolidated variable interest entities and VIE's subsidiaries without recourse	45	38
Deferred revenue and income, current portion of consolidated variable interest entities and VIE's subsidiaries without recourse	24,260	24,902
Income tax payable, consolidated variable interest entities and VIE's subsidiaries without recourse	2,253	2,407
Accrued liabilities and other payables, consolidated variable interest entities and VIE's subsidiaries without recourse	104,114	131,312
Deferred revenue, non-current portion of consolidated variable interest entities and VIE's subsidiaries without recourse	$ 3,539	$ 4,751
Common stock, par value	$ 0.00025	$ 0.00025
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	368,877,209	368,877,209
Common stock, shares outstanding	330,545,000	339,319,115
Treasury stock, shares	38,332,209	29,558,094

Consolidated Statements of Comprehensive Income/(Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues, net of rebates and discounts	$ 156,966	$ 129,996	$ 135,812
Business taxes and surcharges	(804)	(361)	(1,878)
Net revenues	156,162	129,635	133,934
Cost of revenues	(80,319)	(60,034)	(55,755)
Gross profit	75,843	69,601	78,179
Operating expenses
Research and development expenses	(64,360)	(38,250)	(29,252)
Sales and marketing expenses	(18,782)	(15,042)	(13,527)
General and administrative expenses	(26,168)	(28,774)	(26,945)
Total operating expenses	(109,310)	(82,066)	(69,724)
Operating income / (loss)	(33,467)	(12,465)	8,455
Interest income	2,158	5,833	6,733
Interest expense	(239)	(239)	(163)
Other income, net	6,503	3,627	13,966
Share of loss from equity investees	(195)	(12)	(259)
Income/(loss) from continuing operations before income tax	(25,240)	(3,256)	28,732
Income tax (expense)/benefit	1,264	886	(463)
Net income/(loss) from continuing operations	(23,976)	(2,370)	28,269
Discontinued operations
Loss from discontinued operations before income taxes	(243)	(10,048)	(20,330)
Income tax benefit / (expense)	36	(2,048)	1,923
Net loss from discontinued operations	(207)	(12,096)	(18,407)
Net income/(loss)	(24,183)	(14,466)	9,862
Less: net loss attributable to the non-controlling interest	(72)	(1,299)	(950)
Net income/(loss) attributable to Xunlei Limited	(24,111)	(13,167)	10,812
Acceleration of amortization of beneficial conversion feature			(49,346)
Deemed dividend to certain shareholders from repurchase of shares			(14,926)
Deemed dividend to preferred shareholders upon initial public offering			(32,807)
Net loss attributable to Xunlei Limited’s common shareholders	(24,111)	(13,167)	(105,366)
Net income/(loss)	(24,183)	(14,466)	9,862
Other comprehensive loss: Foreign currency translation adjustment, net of tax	(9,325)	(9,945)	(114)
Comprehensive income/(loss)	(33,508)	(24,411)	9,748
Less: comprehensive (loss)/income attributable to non-controlling interest shareholders	80	(1,198)	(955)
Comprehensive income/(loss) attributable to Xunlei Limited	$ (33,588)	$ (23,213)	$ 10,703
Basic net loss per share attributable to Xunlei Limited from continuing operations	$ (0.07)	$ (0.00)	$ (0.45)
Basic net loss per share attributable to Xunlei Limited from discontinued operations	$ (0.00)	$ (0.04)	$ (0.09)
Weighted average number of common shares outstanding—basic	334,155,668	335,987,595	194,711,227
Diluted net loss per share attributable to Xunlei Limited from continuing operations	$ (0.07)	$ (0.00)	$ (0.45)
Diluted net loss per share attributable to Xunlei Limited from discontinued operations	$ (0.00)	$ (0.04)	$ (0.09)
Weighted average number of common shares outstanding—diluted	334,155,668	335,987,595	194,711,227
Series D Preferred Stock [Member]
Discontinued operations
Accretion to convertible redeemable preferred shares redemption value			$ (1,870)
Deemed dividend to shareholder from its modification			(279)
Series C To One Series C [Member]
Discontinued operations
Contingent beneficial conversion feature			(57)
Series E Preferred Shares [Member]
Discontinued operations
Accretion to convertible redeemable preferred shares redemption value			(12,754)
Amortization of beneficial conversion feature			(4,139)
Acceleration of amortization of beneficial conversion feature			$ (49,346)

Consolidated statements of changes in shareholders' equity - USD ($) $ in Thousands	Total	Kingsoft Cloud Storage Business [Member]	Series E tranche 1 [Member]	Series E Tranche 2 [Member]	Series D Preferred Stock [Member]	Series E Preferred Stock [Member]	Initial Public Offering [Member]	Common shares [Member]	Common shares [Member] Initial Public Offering [Member]	Treasury stock [Member]	Additional paid-in capital [Member]	Additional paid-in capital [Member] Kingsoft Cloud Storage Business [Member]	Additional paid-in capital [Member] Series E tranche 1 [Member]	Additional paid-in capital [Member] Series E Tranche 2 [Member]	Additional paid-in capital [Member] Series D Preferred Stock [Member]	Additional paid-in capital [Member] Series E Preferred Stock [Member]	Additional paid-in capital [Member] Series C To One Series C [Member]	Additional paid-in capital [Member] Initial Public Offering [Member]	Retained earnings (Accumulated deficits) [Member]	Retained earnings (Accumulated deficits) [Member] Series D Preferred Stock [Member]	Retained earnings (Accumulated deficits) [Member] Series E Preferred Stock [Member]	Retained earnings (Accumulated deficits) [Member] Series C To One Series C [Member]	Statutory reserves [Member]	Accumulated other comprehensive Income/(loss) [Member]	Non-controlling interest [Member]	Non-controlling interest [Member] Series B [Member]	Non-controlling interest [Member] Series A-1 Preferred Stock [Member]	Non-controlling interest [Member] Series A [Member]	Convertible non-redeemable preferred shares [Member] Series C [Member]	Convertible non-redeemable preferred shares [Member] Series B [Member]	Convertible non-redeemable preferred shares [Member] Series A-1 Preferred Stock [Member]	Convertible non-redeemable preferred shares [Member] Series A [Member]	Convertible non-redeemable preferred shares [Member] Initial Public Offering [Member] Series C [Member]	Convertible non-redeemable preferred shares [Member] Initial Public Offering [Member] Series B [Member]	Convertible non-redeemable preferred shares [Member] Initial Public Offering [Member] Series A-1 Preferred Stock [Member]	Convertible non-redeemable preferred shares [Member] Initial Public Offering [Member] Series A [Member]
Beginning Balance, Amount at Dec. 31, 2013																													$ 1	$ 8	$ 9	$ 7
Beginning Balance, Amount at Dec. 31, 2013	$ 79,194							$ 15		$ 2	$ 61,634								$ 7,037				$ 4,478	$ 6,003	$ 84
Beginning Balance, Shares at Dec. 31, 2013																													5,728,264	30,308,284	36,400,000	26,416,560
Beginning Balance, Shares at Dec. 31, 2013								61,447,372		9,073,732
Accretion to convertible redeemable preferred shares redemption value					$ (1,870)	$ (12,754)									$ (717)	$ (10,229)				$ (1,153)	$ (2,525)
Amortisation of BCF						$ (4,139)										$ (3,206)					$ (933)
Deemed dividend of convertible preferred shares from their modifications					$ (279)															$ (279)
Contingent beneficial conversion feature																	$ 57					$ (57)
Repurchase of shares, Amount	(59,082)							$ (4)			(47,403)								(11,674)							$ (1)
Repurchase of shares, shares								(14,664,637)																		(3,756,065)	(591,451)	(477,180)
Acceleration of amortization of beneficial conversion feature	(49,346)										(49,346)
Deemed dividend to preferred shareholders upon initial public offering	(32,807)										(32,807)
Issuance of common shares for share incentive plans, Amount							$ 470,759		$ 71	$ 5	(5)							$ 470,712															$ (1)	$ (7)	$ (9)	$ (7)
Issuance of common shares for share incentive plans, Shares									277,834,210	24,195,412																							(5,728,264)	(26,552,219)	(35,808,549)	(25,939,380)
IPO expenses	(4,216)										(4,216)
Exercised share options, Amount	295										295
Exercised share options, Shares								1,431,320		(1,431,320)
Vested restricted shares								1,563,222		(1,563,222)
Share-based compensation		$ 303										$ 303
Share-based compensation - others	7,644										7,644
Beneficial conversion feature			$ 52,377	$ 1,109									$ 52,377	$ 1,109
Statutory Reserve																			(654)				654
Net income / (loss)	10,812																		10,812						(949)
Translation adjustments at Dec. 31, 2014	(109)																							(109)	(5)
Ending Balance, Amount at Dec. 31, 2014
Ending Balance, Amount at Dec. 31, 2014	457,891							$ 82		$ 7	446,202								574				5,132	5,894	(870)
Ending Balance, Shares at Dec. 31, 2014
Ending Balance, Shares at Dec. 31, 2014								327,611,487		30,274,602
Repurchase of shares, Amount	(1,287)										(1,287)
Repurchase of shares, shares								(1,068,095)		1,068,095
Deemed dividend to preferred shareholders upon initial public offering
Exercised share options, Shares	3,189,944
Issuance of common shares for the vesting of restricted shares and the exercise of share options, Amount										$ 3	(3)
Issuance of common shares for the vesting of restricted shares and the exercise of share options, shares										10,991,120
Issuance of common shares for exercised share options, Amount	3,630							$ 2		$ (2)	3,630
Issuance of common shares for exercised share options, shares								9,092,265		(9,092,265)
Share-based compensation	9,728										9,728
Restricted shares vested, Amount								$ 1		$ (1)
Restricted shares vested, shares								3,683,458		(3,683,458)
Net income / (loss)	(13,167)																		(13,167)						(1,299)
Translation adjustments at Dec. 31, 2015	(10,046)																							(10,046)	101
Ending Balance, Amount at Dec. 31, 2015
Ending Balance, Amount at Dec. 31, 2015	446,749							$ 85		$ 7	458,270								(12,593)				5,132	(4,152)	(2,068)
Ending Balance, Shares at Dec. 31, 2015
Ending Balance, Shares at Dec. 31, 2015								339,319,115		29,558,094
Repurchase of shares, Amount	(14,319)							$ (3)		$ 3	(14,329)
Repurchase of shares, shares								(12,272,500)		12,272,500
Deemed dividend to preferred shareholders upon initial public offering
Exercised share options, Shares	440,465
Issuance of common shares for exercised share options, Amount	$ 58										58
Issuance of common shares for exercised share options, shares								440,465		(440,465)
Share-based compensation	9,338										9,348
Restricted shares vested, Amount								$ 1		$ (1)
Restricted shares vested, shares								3,057,920		(3,057,920)
Net income / (loss)	(24,111)																		(24,111)						(72)
Translation adjustments at Dec. 31, 2016	(9,477)																							(9,477)	152
Ending Balance, Amount at Dec. 31, 2016
Ending Balance, Amount at Dec. 31, 2016	$ 408,238							$ 83		$ 9	$ 453,347								$ (36,704)				$ 5,132	$ (13,629)	$ (1,988)
Ending Balance, Shares at Dec. 31, 2016
Ending Balance, Shares at Dec. 31, 2016								330,545,000		38,332,209

Consolidated Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities
Net income/(loss)	$ (24,183)	$ (14,466)	$ 9,862
Adjustments to reconcile net income/(loss) to net cash generated from operating activities (note)
Depreciation of property and equipment	6,165	5,646	6,500
Amortization of intangible assets	2,223	12,149	38,741
Allowance for doubtful accounts		4	1,767
Loss on disposal of property and equipment	85	4
Gain from barter transactions		(409)	(4,428)
Share-based compensation	9,348	9,728	7,644
Decrease in fair value of warrants			(8,054)
Share of loss / (income) from equity investees	195	12	259
Investment income on short-term investments	(506)	(997)	(317)
Loss on exchange of warrants			405
Deemed disposal gain on long-term investments	(689)	(702)	(449)
Interest expense accrued on long-term payable	239	239	163
Deferred taxes	(954)	873	(1,856)
Deferred government grants	(3,473)	(1,969)	(2,059)
Changes in operating assets and liabilities:
Accounts receivable	(5,168)	1,395	4,699
Prepayments and other assets	13,947	3,815	(9,180)
Due from/to related parties	(1,180)	(70)	(168)
Accounts payable	15,855	301	2,569
Inventories	59	(526)
Deferred revenue	2,631	(294)	(2,643)
Income tax payable	147	153	(5)
Accrued liabilities and other payables	2,229	(1,122)	4,752
Net cash generated from operating activities	16,970	13,764	48,202
Cash flows from investing activities
Acquisition of property and equipment	(13,756)	(4,931)	(7,770)
Purchase of short-term investments	(209,034)	(222,157)	(330,471)
Proceeds from disposal of short-term investments	94,139	175,513	341,792
Proceeds from disposal of fixed assets	22	25
Proceeds from disposal of Kankan		16,687
Proceeds from disposal of long-term investments	3,670
Purchase of intangible assets	(121)	(11,894)	(38,056)
Acquisition of long-term investments	(33,233)	(8,330)	(2,359)
Acquisition of Kingsoft Cloud Storage business			(33,000)
Loans (to)/repayment of loan from employees	(22)	105	(767)
Repayment of advance from a shareholder			85
Net cash used in investing activities	(158,335)	(54,982)	(70,546)
Cash flows from financing activities
Repurchase of shares	(14,319)	(1,287)	(69,303)
Proceeds from initial public offering			93,881
Payment of initial public offering expenses			(3,504)
Prepayment for share repurchase plan	712	288	(1,000)
Governments grants received	2,508	1,055	856
Proceeds from exercise of vested share options	58	4,974	1,523
Initial public offering expenses reimbursement received			1,158
Net cash generated from/(used in) financing activities	(11,041)	5,030	333,268
Net increase/(decrease) in cash and cash equivalents	(152,406)	(36,188)	310,924
Cash and cash equivalents at beginning of year	361,777	404,275	93,906
Effect of exchange rates on cash and cash equivalents	(9,867)	(6,310)	(555)
Cash and cash equivalents at end of year	199,504	361,777	404,275
Supplemental disclosure of cash flow information
Income tax paid		82	241
Non cash investing and financing activities
Acquisition of property and equipment in form of other payables	(1,773)	4,468	240
Initial public offering expenses in form of other payables			712
Purchase of intangible assets in form of accounts payable		62	21,860
Acquisition of intangible assets in form of barter transactions			4,030
Deemed dividend to certain shareholders from repurchase of shares			14,926
Acceleration of amortization of beneficial conversion feature of Series E upon initial public offering			49,346
Deemed dividend to preferred shareholders upon initial public offering			32,807
Series D Preferred Stock [Member]
Adjustments to reconcile net income/(loss) to net cash generated from operating activities (note)
Loss on exchange of warrants			(405)
Non cash investing and financing activities
Deemed dividend to preferred shareholders			279
Accretion to preferred shares redemption value			1,870
Series E Preferred Shares [Member]
Cash flows from financing activities
Issuance of Series E preferred shares			275,314
Issuance of Series E warrants			34,686
Payment of Series E financing expenses			(343)
Non cash investing and financing activities
Accretion to preferred shares redemption value			12,754
Amortization of beneficial conversion feature of Series E			4,139
Acceleration of amortization of beneficial conversion feature of Series E upon initial public offering			49,346
Series C To One Series C [Member]
Non cash investing and financing activities
Contingent beneficial conversion feature			$ 57

Organization and nature of operations

12 Months Ended

Dec. 31, 2016

Organization and nature of operations [Abstract]

Organization and nature of operations

Organization and nature of operations

Xunlei Limited, previously known as Giganology Limited, (the “Company”) was incorporated under the law of the Cayman Islands (“Cayman”) as a limited liability company on February 3, 2005. These consolidated financial statements include the financial statements of the Company, its subsidiaries, its variable interest entity (“VIE”) and the VIE’s subsidiaries (collectively referred to as the “Group”) as follows:

Name of entities	Place of incorporation	Date of incorporation	Relationship	% of direct or indirect economic ownership	Principal activities
Shenzhen Xunlei Networking Technologies, Co., Ltd. (“Shenzhen Xunlei”)	China	January 2003	VIE	100%	Development of software, provision of online and related advertising, membership subscription and online game services; as well as sales of software licenses

Giganology (Shenzhen) Co., Ltd. (“Giganology Shenzhen”)	China	June 2005	Subsidiary	100%	Development of computer software and provision of information technology services to related companies

Shenzhen Xunlei Wangwenhua Co., Ltd. (formerly known as “Shenzhen Fengdong Networking Technologies Co., Ltd.”) (“Wangwenhua”)	China	December 2005	VIE’s subsidiary	100%	Development of software for related companies

Xunlei Networking Technologies (Beijing) Co., Ltd. (“Beijing Xunlei”)	China	June 2009	VIE’s subsidiary	100%	Development of software for related companies

Shenzhen Zhuolian Software Co., Ltd. (formerly known as “Xunlei Software (Shenzhen) Co., Ltd.”) (“Zhuolian Software”)	China	January 2010	VIE’s subsidiary	100%	Provision of software technology development for related companies

Name of entities	Place of incorporation	Date of incorporation	Relationship	% of direct or indirect economic ownership		Principal activities
Xunlei Games Development (Shenzhen) Co., Ltd. (“Xunlei Games”)	China	February 2010	VIE’s subsidiary	70	%	Development of online game and computer software for related companies and provision of advertising services

Xunlei Network Technologies Limited (“Xunlei BVI”)	British Virgin Islands	February 2011	Subsidiary	100	%	Holding company

Xunlei Network Technologies Limited (“Xunlei HK”)	Hong Kong	March 2011	Subsidiary	100	%	Development computer software of related companies and provision of advertising services

Xunlei Computer (Shenzhen) Co., Ltd. (“Xunlei Computer”)	China	November 2011	Subsidiary	100	%	Development of computer software and provision of information technology services to related companies

Shenzhen Onething Technologies Co., Ltd. (“Onething”)	China	September 2013	VIE’s subsidiary	100	%	Development of computer software and provision of information technology services to related companies

Beijing Xunjing Technologies Co., Ltd. (formerly known as “Wangxin Century Technologies (Beijing) Co., Ltd.”) (“Beijing Xunjing”)	China	October 2015	VIE’s subsidiary	100	%	Development of computer software and provision of information technology services

Shenzhen Crystal Interactive Technologies Co., Ltd. (“Crystal Interactive”)	China	May 2016	VIE’s subsidiary	100	%	Development of computer software and provision of information technology services

Shenzhen Xunlei Venture Capital Partnership Enterprise (Limited Partnership) (“Xunlei Venture Capital”)	China	June 2016	VIE’s subsidiary	99	%	Investments in industries and consultation in investments

Shenzhen Xunlei Kankan Information Technologies Co., Ltd. (formerly known as “155 Networking (Shenzhen) Co., Ltd.”) (“Xunlei Kankan”)	China	August 2008	VIE’s subsidiary	100	%	Development of software for related companies(note a)

Note a: Xunlei Kankan was disposed in 2015. See note 3 for details.

Note b: The English names of the PRC companies represent management’s translation of their Chinese names of these companies as they have not adopted formal English names.

The Group engages primarily in the provision of premium downloading services to its members, online advertising services on its websites, sales of bandwidth and online game platforms for game developers and users.

To comply with the PRC laws and regulations that prohibit or restrict foreign ownership of companies that provide online advertising services, operate online games, and hold Internet Content Provider (‘‘ICP’’) license, the company conducts its business through Shenzhen Xunlei, its consolidated VIE.

Through the various agreements enacted among the Company, Giganology Shenzhen, a wholly owned subsidiary of the Company, Shenzhen Xunlei and legal shareholders of Shenzhen Xunlei (the “Restructuring”), the Company received all of the economic benefits and residual interest and absorbed all of the risks and expected losses from Shenzhen Xunlei.

Details of certain key agreements with the VIE are as follows:

—Loan Agreements between Giganology Shenzhen and the shareholders of Shenzhen Xunlei— Giganology Shenzhen provided interest-free loans of RMB 9 million to the shareholders of Shenzhen Xunlei for them to make contributions as registered capital into Shenzhen Xunlei. The term of these agreements last for two years from the date it was signed, and will be automatically extended afterwards on a yearly basis until each shareholder of Shenzhen Xunlei has repaid the loans in its entirety in accordance with the loan agreement. The shareholders would not be allowed to transfer their interests in Shenzhen Xunlei without prior consent of Giganology Shenzhen. According to the loan agreements, the loans can only be repaid in the form of common shares of Shenzhen Xunlei. At any time during the term of the loan agreements, Giganology Shenzhen may, at their sole discretion, requires any of the shareholders of Shenzhen Xunlei to repay all or any portion of their outstanding loan under the agreement.

Under a separate loan agreement between Giganology Shenzhen and Mr. Sean Shenglong Zou as a shareholder of Shenzhen Xunlei, Giganology Shenzhen made an additional interest-free loan of RMB20 million to Mr. Sean Shenglong Zou, the entire amount of which was contributed to the registered capital of Shenzhen Xunlei, increasing the registered capital of Shenzhen Xunlei to RMB30 million. The term of this agreement last for two years from the date it was signed, and will be automatically extended afterwards on a yearly basis until Mr. Zou has repaid the loan in its entirety in accordance with the loan agreement. This loan will be deemed to be repaid when all equity interest held by the shareholders in Shenzhen Xunlei has been transferred to Giganology Shenzhen or its designated parties. At any time during the term of this loan agreement, the Company may, at their sole discretion, require all or any portion of the outstanding loan under the agreement to be repaid.

—Business Operation Agreements between Giganology Shenzhen and Shenzhen Xunlei—Under these agreements, Giganology Shenzhen has the rights to direct the operating activities of Shenzhen Xunlei, including the appointment of senior management. The shareholders of Shenzhen Xunlei also transferred all their shareholders’ rights to Giganology Shenzhen. The term of this agreement will expire in 2016 and may be extended with Giganology Shenzhen’s confirmation prior to the expiration date. For instance, in May 2011, Shenzhen Xunlei sought and obtained consent from Giganology Shenzhen and the Company to increase its registered capital by RMB20 million and to revise its articles of association accordingly. This agreement expired on November 15, 2016 and has been extended to 2026.

—Equity Pledge Agreement between Giganology Shenzhen and the shareholders of Shenzhen Xunlei—Under this agreement, the shareholders of Shenzhen Xunlei pledged all of their equity interests in Shenzhen Xunlei to Giganology Shenzhen. If Shenzhen Xunlei and/or its shareholders breach their contractual obligations under this agreement, Giganology Shenzhen, as pledgee, will be entitled to certain rights, including the right to sell the pledged equity interests.

—Power of Attorney—Each shareholder of Shenzhen Xunlei appointed Giganology Shenzhen as its attorney-in-fact to exercise their shareholders’ rights in Shenzhen Xunlei, including shareholders’ voting rights. Each power of attorney will remain in force for 10 years unless the business operation agreement among Giganology Shenzhen, Shenzhen Xunlei and the shareholders of Shenzhen Xunlei is terminated in advance. This period may be extended at Giganology Shenzhen’s discretion.

—Service Agreements between Giganology Shenzhen and Shenzhen Xunlei—Under various service agreements, Giganology Shenzhen will provide services including technical support, training, as well as consulting services to Shenzhen Xunlei in exchange for a service fee. These service agreements include the Exclusive Technology Support and Services Agreement, the Exclusive Technology Consulting and Training Agreement and the Software and Proprietary Technology License Contract. Giganology Shenzhen is entitled to service fees equal to 20%, 20% and 40% of the pre-tax operating profit of Shenzhen Xunlei according to the terms and provisions of these agreements, respectively (in aggregate 80% of pre-tax operating profit of Shenzhen Xunlei). In addition, these agreements also allow both parties to review and adjust the above mentioned percentage every six months according to the business operation and income of Shenzhen Xunlei so as to enable Giganology Shenzhen to extract substantially all the after tax operating profit of Shenzhen Xunlei. The amount of service fees payable from Shenzhen Xunlei to Giganology Shenzhen for the years ended December 31, 2014, 2015 and 2016 was USD1,228 thousand, USD 1,235 thousand and USD 1,088 thousand, respectively.

For the Exclusive Technology Support and Services Agreement and the Exclusive Technology Consulting and Training Agreement, the term of these agreements will expire in 2025 and may be extended with Giganology Shenzhen’s written confirmation prior to the expiration date. Giganology Shenzhen is entitled to terminate the agreement at any time by providing 30 days’ prior written notice to Shenzhen Xunlei.

For the Proprietary Technology License Contract, the term of this contract will expire in 2022 and may be extended with Giganology Shenzhen’s written confirmation prior to the expiration date. Giganology Shenzhen grants Shenzhen Xunlei a non-exclusive and non-transferable right to use Giganology Shenzhen’s proprietary technology. Shenzhen Xunlei can only use the proprietary technology to conduct business according to its authorized business scope. Giganology Shenzhen or its designated representative(s) owns the rights to any new technology developed due to implementation of this contract.

—Intellectual Properties Purchase Option Agreement between Giganology Shenzhen and Shenzhen Xunlei. Giganology Shenzhen has an option to acquire Shenzhen Xunlei’s intellectual properties at the lowest price permissible by the then-applicable PRC laws and regulation. The term of this contract will expire in 2022 and may be automatically extended for an additional 10 years at Giganology Shenzhen’s discretion.

—Call Option Agreement—Giganology Shenzhen has an option to acquire all of the outstanding shares of Shenzhen Xunlei at a purchase price equal to RMB 1 or the lowest price permissible by the then-applicable PRC laws and regulation. The term of the agreement will expire in 2022 and may be extended at Giganology Shenzhen’s discretion.

As a result of these agreements (collectively defined as “Structured Service Contracts”), Giganology Shenzhen can exercise effective control over Shenzhen Xunlei, receives all of the economic benefits and residual interest and absorbs all of the risks and expected losses from Shenzhen Xunlei as if it were the sole shareholder, and has an exclusive option to purchase all of the equity interest in Shenzhen Xunlei at a minimal price. Therefore, Giganology Shenzhen is considered the primary beneficiary of Shenzhen Xunlei and accordingly Shenzhen Xunlei’s results of operations, assets and liabilities have been consolidated in the Company’s financial statements.

VIE-Related Risks

It is possible that the Group’s operation of certain of its operations and businesses through VIEs could be found by PRC authorities to be in violation of PRC law and regulations prohibiting or restricting foreign ownership of companies that engage in such operations and businesses. While the Group’s management considers the possibility of such a finding by PRC regulatory authorities under current law and regulations to be remote, on January 19, 2015, the Ministry of Commerce of the PRC, or (the “MOFCOM”) released on its Website for public comment a proposed PRC law (the “Draft FIE Law”) that appears to include VIEs within the scope of entities that could be considered to be foreign invested enterprises (or “FIEs”) that would be subject to restrictions under existing PRC law on foreign investment in certain categories of industry. Specifically, the Draft FIE Law introduces the concept of “actual control” for determining whether an entity is considered to be an FIE. In addition to control through direct or indirect ownership or equity, the Draft FIE Law includes control through contractual arrangements within the definition of “actual control.” If the Draft FIE Law is passed by the People’s Congress of the PRC and goes into effect in its current form, these provisions regarding control through contractual arrangements could be construed to reach the Group’s VIE arrangements, and as a result the Group’s VIEs could become explicitly subject to the current restrictions on foreign investment in certain categories of industry. The Draft FIE Law includes provisions that would exempt from the definition of foreign invested enterprises entities where the ultimate controlling shareholders are either entities organized under PRC law or individuals who are PRC citizens. The Draft FIE Law does not make clear how “control” would be determined for such purpose, and is silent as to what type of enforcement action might be taken against existing VIEs that operate in restricted industries and are not controlled by entities organized under PRC law or individuals who are PRC citizens. If a finding were made by PRC authorities, under existing law and regulations or under the Draft FIE Law if it becomes effective, that the Group’s operation of certain of its operations and businesses through VIEs, regulatory authorities with jurisdiction over the licensing and operation of such operations and businesses would have broad discretion in dealing with such a violation, including levying fines, confiscating the Group’s income, revoking the business or operating licenses of the affected businesses, requiring the Group to restructure its ownership structure or operations, or requiring the Group to discontinue all or any portion of its operations. Any of these actions could cause significant disruption to the Group’s business operations, and have a severe adverse impact on the Group’s cash flows, financial position and operating performance.

In addition, it is possible that the contracts among the Group, the Group’s VIEs and shareholders of its VIEs would not be enforceable in China if PRC government authorities or courts were to find that such contracts contravene PRC law and regulations or are otherwise not enforceable for public policy reasons. In the event that the Group was unable to enforce these contractual arrangements, the Group would not be able to exert effective control over the affected VIEs. Consequently, such VIE’s results of operations, assets and liabilities would not be included in the Group’s consolidated financial statements. If such were the case, the Group’s cash flows, financial position and operating performance would be severely adversely affected. The Group’s contractual arrangements with respect to its consolidated VIEs are approved and in place. The Group’s management believes that such contracts are enforceable, and considers the possibility remote that PRC regulatory authorities with jurisdiction over the Group’s operations and contractual relationships would find the contracts to be unenforceable.

Initial public offering

The Company completed its initial public offering (“IPO”) on June 24, 2014 on the NASDAQ Global Market and the underwriters subsequently exercised their over-allotment option on June 27, 2014. The Company issued and sold a total of 8,412,250 American Depositary Shares (“ADSs”) pursuant to these transactions. Each ADS represents five common shares. The net proceeds received by the Company, after deducting commissions and offering expenses, amounted to approximately US$ 89,665 thousand. Upon the completion of the IPO, all of the Company’s outstanding preferred shares were converted into common shares immediately as of the same date.

Summary of significant accounting policies

12 Months Ended

Dec. 31, 2016

Summary of significant accounting policies [Abstract]

Summary of significant accounting policies

Summary of significant accounting policies

(a)

Basis of presentation and use of estimates

The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (‘‘U.S. GAAP’’). Significant accounting policies followed by the Group in the preparation of the accompanying consolidated financial statements are summarized below.

The Restructuring was accounted for at historical costs. The assets and liabilities of Shenzhen Xunlei are consolidated in the Company’s financial statements at carryover basis.

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the accompanying consolidated financial statements and related disclosures. Actual results could differ materially from these estimates. Significant accounting estimates reflected in the Group’s consolidated financial statements mainly include the useful lives of property and equipment, allowance for doubtful accounts, valuation allowance of deferred tax assets, sales rebate to advertising agencies, amortization period of online game revenue, amortization of content copyrights, fair value of content copyrights exchange, impairment assessment of goodwill and impairment assessment of long-lived assets. In addition, the Group uses assumptions in a valuation model to estimate the fair value of share options granted, warrants issued and underlying common shares.

Management bases the estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results could differ from these estimates.

(b)

Consolidation

The consolidated financial statements include the financial statements of the Company, its subsidiaries, VIE for which the Company is the primary beneficiary and its subsidiaries. All significant transactions and balances among the Company, its subsidiaries, VIE and its subsidiaries have been eliminated upon consolidation.

A subsidiary is an entity in which the Company, directly or indirectly, controls more than one-half of the voting power, or has the power to appoint or remove the majority of the members of the board of directors to cast majority of votes at meetings of the board of directors or to govern the financial and operating policies of the investee under a statute or agreement among the shareholders or equity holders.

An entity is considered to be a VIE if the entity’s equity holders do not have the characteristics of a controlling financial interest or do not have sufficient equity at risk for the entity to finance its activities without additional subordinated financial support from other parties.

The Group consolidates entities for which the Company is the primary beneficiary if the entity’s other equity holders do not have the characteristics of a controlling financial interest or do not have sufficient equity at risk for the entity to finance its activities without additional subordinated financial support from other parties.

In determining whether the Company or its subsidiary is the primary beneficiary of a VIE, the Company considered whether it has the power to direct activities that are significant to the VIE’s economic performance, including the power to appoint senior management, right to direct company strategy, power to approve capital expenditure budgets, and power to establish and manage ordinary business operation procedures and internal regulations and systems.

Management has evaluated the contractual arrangements among Giganology Shenzhen, Shenzhen Xunlei and its shareholders and concluded that Giganology Shenzhen receives all of the economic benefits and absorbs all of the expected losses from Shenzhen Xunlei and has the power to direct the aforementioned activities that are significant to Shenzhen Xunlei’s economic performance, and is the primary beneficiary of Shenzhen Xunlei. Therefore, Shenzhen Xunlei and its subsidiaries’ results of operation, assets and liabilities have been included in the Group’s consolidated financial statements. Management monitors the regulatory risk associated with these contractual arrangements. See Note 25 for further discussion.

Non-controlling interests represent the portion of the net assets of a subsidiary attributable to interests that are not owned by the Company. The non-controlling interests are presented in the consolidated balance sheets, separately from equity attributable to the shareholders of the Company. Non-controlling interests in the results of the Group is presented on the face of the consolidated statements of comprehensive income as an allocation of the total income or loss for the year/period between non-controlling shareholders and the shareholders of the Company.

(c)

Discontinued operations

When disposals that represent a strategic shift that has (or will have) a major effect on the entity’s results and operations would qualify as discontinued operations. Discontinued operations are reported when a component of an entity comprising operations and cash flows that can be clearly distinguished, operationally and for financial reporting purposes, from the rest of the entity is classified as held for disposal or has been disposed of, if the component either (1) represents a strategic shift or (2) have a major impact on an entity’s financial results and operations. Examples include a disposal of a major geographical location, line of business, or other significant part of the entity, or disposal of a major equity method investment. In the consolidated income statement, result from discontinued operations is reported separately from the income and expenses from continuing operations and prior periods are presented on a comparative basis. Cash flows for discontinuing operations are presented separately in note 3. In order to present the financial effects of the continuing operations and discontinued operations, revenues and expenses arising from intra-group transactions are eliminated except for those revenues and expenses that are considered to continue after the disposal of the discontinued operations.

Non-current assets or disposal groups are classified as assets held for sale when the carrying amount is to be recovered principally through a sale transaction rather than through continuing use. For this to be the case, the asset or disposal group must be available for immediate sale in its present condition subject only to terms that are usual and customary for sale of such assets or disposal groups and the sale must be highly probable. Non-current assets classified as held for sale and disposal groups are measured at the lower of their carrying or fair value less costs to sell.

(d)

Foreign currency translation

The Company’s reporting and functional currency is the United States Dollar (‘‘USD’’). Xunlei BVI and Xunlei HK’s functional currency is the USD. The functional currency of other subsidiaries, VIE and its subsidiaries located in the PRC is the Renminbi (‘‘RMB’’), which is their respective local currency. Transactions denominated in foreign currencies are remeasured into the functional currency at the exchange rates prevailing on the transaction dates. Financial assets and liabilities denominated in foreign currencies are remeasured into the functional currency using the applicable exchange rates prevailing at the balance sheet date. The resulting exchange gains and losses from foreign currency transactions are included in other income (loss) within the consolidated statements of comprehensive income.

The Company uses the monthly average exchange rate for the year and the exchange rates at the balance sheet date to translate the operating results and financial position, respectively, of its subsidiaries whose functional currency is other than the USD. The resulting translation differences are recorded in cumulated translation adjustments, a component of shareholders’ equity.

The exchange rate used is released by Chinese State Administration of Foreign Exchange.

(e)

Cash and cash equivalents

Cash and cash equivalents include cash on hand, cash in bank and time deposits placed with banks or other financial institutions, which have original maturities of three months or less and are readily convertible to known amounts of cash.

(f)

Short-term investments

Short-term investments include deposits placed with banks with original maturities of more than three months but less than one year and investments in financial instruments with a variable interest rate indexed to the performance of underlying assets. In accordance with ASC 825 Financial Instruments, for investments in financial instruments with a variable interest rate indexed to performance of underlying assets, the Group elected the fair value method at the date of initial recognition and carried these investments subsequently at fair value. Changes in the fair value are reflected in the consolidated statements of comprehensive income. Interest generated from short term investments are recorded when interest payments are received at the maturity date. It is recorded as “other income” on the statement of comprehensive income and measured based on the actual amount of interest the Group received.

(g)

Fair value of financial instruments

The Group’s financial instruments consist principally of cash and cash equivalents, short-term investments, accounts receivable, other receivables, amounts due from/(to) related parties, accounts payable, other payables and warrants liabilities. The carrying value of these balances, with the exception of short-term investments (see note 2 (f)), approximates their fair value due to the current and short term nature of these balances.

(h)

Accounts receivable, net

Accounts receivable are presented net of allowance for doubtful accounts. The Group evaluates the creditworthiness of each customer at the time when services are rendered and continuously monitor the recoverability of the accounts receivable.

The Group uses specific identification method in providing for bad debts when facts and circumstances indicate that collection is doubtful and a loss is probable and estimable. If the financial conditions of its customers were to deteriorate, resulting in an impairment of their ability to make payments, additional allowances might be required. The allowance for doubtful accounts is based on the best facts available and is re-evaluated and adjusted on a regular basis as additional information is received.

Some of the factors that the Group considers in determining whether a bad debt allowance is recorded on an individual customer are:

1) the customer's past payment history and whether it fails to comply with its payment schedule;

2) whether the customer is in financial difficulty due to economic or legal factors;

3) a significant dispute with the customer has occurred;

4) the objective evidence which indicates non-collectability of the accounts receivable.

The allowances provided for Accounts Receivable from continuing operations as of December 31, 2015 and 2016 were USD 0.1 million and USD 0.1 million, respectively.

If the Group determines that an allowance is needed for a customer, the Group will discontinue business with them unless they start to resume payment. The accounts receivable is written-off when the Group ceases pursuing collection. Any changes in the estimates may cause the Group's operating results to fluctuate.

(i)

Inventories

Inventories are stated at the lower of cost or net realizable value. Cost is determined using actual cost on a weighted average basis. Net realizable value is the amount that can be realized from the sale of the inventory in the inventory in the normal course of business after allowing for the costs of realization.

An allowance is recorded for excess inventory and obsolescence based on the lower of cost or net realizable value.

(j)

Long-term investments

The Group holds investments in privately held companies. The Group accounts for these investments over which it has significant influence but does not own a majority equity interest or otherwise control using the equity method of accounting. For investments in an investee over which the Group does not have significant influence and of which the investee has no readily determinable fair value, the Group carries the investment using the cost method. Under the cost method, the investment is measured initially at cost. The investment carried at cost should recognize income when dividends are received from the distribution of the investee’s earnings. The Group assesses its long-term investments for other-than-temporary impairment by considering factors including, but not limited to, current economic and market conditions, operating performance of the companies, including current earnings trends and undiscounted cash flows, and other company-specific information. The fair value determination, particularly for investments in privately-held companies, requires significant judgment to determine appropriate estimates and assumptions. Changes in these estimates and assumptions could affect the calculation of the fair value of the investments and determination of whether any identified impairment is other-than-temporary. During the year ended December 31, 2014, the Group did not impair any of its long-term investments. In 2015 and 2016, the Group recognised an impairment of USD0.8 million and USD 1.66 million, respectively.

(k)

Property and equipment

Property and equipment are stated at historical cost less accumulated depreciation and impairment loss, if any. Depreciation is calculated using the straight-line method over their estimated useful lives. Residual rate is determined based on the economic value of the asset at the end of the estimated useful life as a percentage of the original cost.

	Estimated useful lives	Residual rate
Servers and network equipment	5 years		5	%
Computer equipment	5 years		5	%
Furniture, fittings and office equipment	5 years		5	%
Motor vehicles	5 years		5	%
Leasehold improvements	shorter of lease term or 3 years		—

Repair and maintenance costs are expensed as incurred. Expenditures that substantially increase an asset’s useful life are capitalized. Upon sale or disposition, gain or loss on the disposal of property and equipment is the difference between the net sales proceeds and the carrying amount of the relevant assets and is recognized in the consolidated statements of operations. The cost and related accumulated depreciation are removed from the financial statements.

(l)

Goodwill

Goodwill represents the excess of the purchase price over the amounts assigned to the fair value of the assets acquired and the liabilities assumed of an acquired business.

(m)

Impairment of goodwill

Impairment of goodwill assessment is performed on at least an annual basis on December 31 or whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. According to ASC 350-20-35, an entity may assess qualitative factors to determine whether it is more likely than not (that is, a likelihood of more than 50 percent) that the fair value of a reporting unit is less than its carrying amount, including goodwill. Alternatively, an entity may proceed directly to perform a two-step goodwill impairment test. The first step compares the fair values of a reporting unit to its carrying amount, including goodwill. If the fair value of a reporting unit exceeds its carrying amount, goodwill is not considered impaired and the second step will not be required. If the carrying amount of a reporting unit exceeds its fair value, the second step compares the implied fair value of the affected reporting unit’s goodwill to the carrying value of that goodwill. The implied fair value of goodwill is determined in a manner similar to accounting for a business combination with the allocation of the assessed fair value determined in the first step to the assets and liabilities of the reporting unit. The excess of the fair value of the reporting unit over the amounts assigned to the assets and liabilities is the implied fair value of goodwill. This allocation process is only performed for purposes of evaluating goodwill impairment and does not result in an entry to adjust the value of any assets or liabilities. An impairment loss is recognized for any excess in the carrying value of goodwill over the implied fair value of goodwill. The judgment in estimating the fair value of a reporting unit includes estimating future cash flows, determining appropriate discount rates and making other assumptions. Changes in these estimates and assumptions could materially affect the determination of the fair value of a reporting unit.

The Group selected directly to perform a two-step goodwill impairment test. For the first step, the impairment test was performed using a discounted cash flow analysis to assess the fair value of the Group, as a single reporting unit. The discounted cash flow analysis, that requires certain assumptions and estimates regarding economics and future profitability, use cash flow projections for the purposes of impairment reviews covering a five-year period. Cash flows beyond the five-year period are extrapolated using an estimated annual growth of not more than 2%. The growth rates used do not exceed the historical growth of the Group. The discount rates used of 18.2% reflect market assessments of the time value and the specific risks. According to the assessment of first step, the fair value of the reporting unit exceeded its carrying amount and goodwill was not considered impaired. Accordingly, the second step was not required.

No goodwill impairment losses were recognized for the year ended December 31, 2016 based on the impairment test performed by the Group.

(n)

Intangible assets

I)	Content copyrights

Licensed copyrights of movies, TV series and variety shows (collectively “Content Copyrights”) are capitalized when 1) the cost of the content is known 2) the content has been accepted by the Group in accordance with the conditions of the license agreement and 3) the content is available for its first showing on the Group’s website. Content Copyrights are carried at cost less accumulated amortization and impairment loss, if any.

The Group has two types of Content Copyrights, 1) non- exclusive Content Copyrights and 2) exclusive Content Copyrights. With non-exclusive Content Copyrights, the Group has the right to broadcast the contents on its own websites. While, with exclusive Content Copyrights, besides the broadcasting right, the Group also has the right to sub-license these exclusive Content Copyrights to third parties.

For non-exclusive Content Copyrights, which only generates primarily indirect cash flows, the amortization method is based on the analysis of historical viewership consumption patterns. The Group determines consumption patterns by tracking the number of viewers watching the content throughout its life cycle. This information is then aggregated to come up with a viewership trend that can support an appropriate method to amortize non-exclusive Content Copyrights. The Group generally categorizes its contents in the Xunlei Kankan website into three broad categories, namely movies; TV series; and variety shows and others, which include reality shows, talent shows, talk shows and entertainment news. The Group adopted the method to amortize the non-exclusive Content Copyrights over the shorter of estimated useful lives or their respective licensing periods using an accelerated method based on consumption patterns. Estimates of the consumption patterns for these non-exclusive Content Copyrights are reviewed periodically and revised, if necessary.

Exclusive Content Copyrights generate both direct and indirect cash flows. For the portion of exclusive Content Copyrights that generate indirect cash flows, the Group uses the amortization method based on the analysis of historical viewership consumption patterns, which is the same with that of non-exclusive Content Copyright as discussed above.

For the portion of exclusive Content Copyrights that generates direct cash flows, the Group amortizes the purchase costs using an individual-film-forecast-computation method, which amortizes such costs based on the ratio of sub-licensing revenue and barter transaction gain (details described in Note 2(r)) generated for the current period to the total ultimate direct revenue estimated to be generated by the exclusive Content Copyrights for their whole license period or estimated useful lives. The Group revisits the forecast at each quarter and year end and makes adjustment, when appropriate.

Content copyrights were disposed of in July 2015 as a result of the divestiture of the Company’s online video streaming platform (see note 3 for details).

II)	Other intangible assets

Other intangible assets, which include computer software, internal use software development costs, online game licenses, domain names, land use right, trademarks, technology (including right-to-use) and non-compete agreement, are carried at cost less accumulated amortization and impairment loss, if any. Exclusive game licenses are amortized using the straight-line method over their licensing period of three years. Computer software, internal use software and domain name are amortized using the straight-line method over their estimated useful life of five years. Land use right is amortized using the straight-line method over their estimated useful life of thirty years.

(o)

Impairment of long-lived assets

The Group evaluates the program usefulness of non-exclusive Content Copyrights and exclusive Content Copyrights pursuant to the guidance in ASC 920-350 Intangible—Goodwill and Other: Recognition, which provides that such rights be reported at the lower of unamortized cost or estimated net realizable value.

For non-exclusive Content Copyrights which only generate indirect cash flows, the Group evaluates the net realizable value of the content library by its three content categories (i.e. movies, TV series, variety shows and others). If management’s expectations of programming usefulness, which represents the expected revenues and related net cash flows derived from the contents, are revised downward, they assess whether it is necessary to write down the unamortized costs to estimated net realizable value. The Group evaluates programming usefulness by category on an annual basis by comparing the unamortized cost to the estimated net realizable value. On a quarterly basis, the Group also monitors whether there are indicators of changes in their expected usage of program materials.

The Group estimates net realizable value using expected net cash flows of the content based on expected future levels of advertising revenues. Such estimates consider historical amounts and anticipated levels of demand. Expected future revenues are reduced by estimated direct costs to provide access to the website and generate the related revenue, including bandwidth costs and server costs. For purposes of estimating revenues for each category of content, the Group considers both expected future advertising revenues sold based on number of impressions delivered as well as advertising sold based on the period of time that it is displayed.

For exclusive Content Copyrights that generate both direct and indirect cash flows, the Group evaluates the net realizable value of the Group’s licensed copyright on a content by content basis. Impairment is assessed on an annual basis by comparing the unamortized cost to the Group’s estimated net realizable value. The Group estimates the net realizable value using expected net cash flows based on expected future levels of advertising and content sub-licensing revenues. For expected future levels of advertising revenue, the Group uses the same estimation methodology used for the impairment assessment of non-exclusive Content Copyrights.

For both exclusive and non-exclusive Content Copyrights, there were no impairments for the years ended December 31, 2014, 2015 and 2016 because a significant portion of the contents was related to movies and TV series, of which approximately 70% to 90% of the purchase costs of the Content Copyrights had already been amortized during the first year of the licensed period. As such, the unamortized carrying amounts were lower than the respective net realizable values when the impairment assessment was performed.

For other long-lived assets, the Group evaluates its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may no longer be recoverable. The Group assesses the recoverability of the long-lived assets by comparing the carrying value of the long-lived assets to the estimated undiscounted future cash flows expected to be received from use of the assets and their eventual disposition at the lowest level of identifiable cash flows. Such assets are considered to be impaired if the sum of the expected undiscounted cash flows is less than the carrying amount of the assets. If the Group identifies an impairment, the carrying value of the asset will be reduced to its estimated fair value based on a discounted cash flow approach or, when available and appropriate, to comparable market values. The impairment of online game license were USD 808 thousand, USD 770 thousand and USD 721 thousand as of December 31, 2014, 2015 and 2016, respectively.

(p)

Commitments and contingencies

In the normal course of business, the Group is subject to contingencies, such as legal proceedings and claims arising out of its business, that cover a wide range of matters. Liabilities for such contingencies are recorded when it is probable that a liability has been incurred and the amount of the assessment can be reasonably estimated. In regards to legal cost, the Group recorded such costs as incurred.

Certain conditions may exist as of the date the financial statements are issued, which may result in a loss to the Group, but which will only be resolved when one or more future events occur or fail to occur. The Group’s management and its legal counsel assess such contingent liabilities, and such assessment inherently involves an exercise of judgment. In assessing loss contingencies related to legal proceedings that are pending against the Group or unasserted claims that may result in such proceedings, the Group, in consultation with its legal counsel, evaluates the perceived merits of any legal proceedings or unasserted claims as well as the perceived merits of the amount of relief sought or expected to be sought therein.

If the assessment of a contingency indicates that it is probable that a material loss has been incurred and the amount of the liability can be estimated, then the estimated liability would be accrued in the Group’s financial statements. If the assessment indicates that a potentially material loss contingency is not probable, but is reasonably possible, or is probable but cannot be estimated, then the nature of the contingent liability, together with an estimate of the range of possible loss, if determinable and material, would be disclosed.

(q)

Operating leases

Leases in which a significant portion of the risks and rewards of ownership are retained by the lessor are classified as operating leases. Payments made under operating lease are charged to the statements of comprehensive income on a straight-line basis over the period of the lease.

(r)

Revenue recognition

The Group generates revenues from various streams. The Group operates a prepaid virtual items system, under which, prepaid virtual items at fixed face value are sold to third parties. Virtual items purchased can be used to subscribe for membership or purchase of virtual items in online games, as discussed below. Virtual items sold but not yet consumed by the users are recorded as “Receipts in advance from customers” and upon consumption, they are recognized as membership subscription and online game revenue according to the respective prescribed revenue recognition policies addressed below.

I)	Subscription revenues

The Group operates a VIP membership program where VIP members can have access to high speed online acceleration services, online streaming and other access privileges. The membership fee is time-based and is collected up-front from subscribers except in the cases when they elect to pay via their mobile operators. The membership fee is collected when the subscribers pay for the monthly phone bills. The terms of time-based subscriptions range from one month to twelve months, with the subscribers having the option to renew the contract. The receipt of subscription fee is initially recorded as deferred revenue and revenue is recognized ratably over the period of subscription as services are rendered. Unrecognized portion beyond 12 months from balance sheet date is classified as a long-term liability. The Group evaluated the principal versus agent criteria and determined that the Group is the principal in the transaction and accordingly record revenue on a gross basis. In determining whether to report revenues gross for the amount of subscription revenue, the Group assesses whether it maintains the principal relationship with the VIP members, whether it bears the credit risk and whether it establishes prices for the end users. Service fees levied by online system, fixed phone line and mobile payment channels (‘‘Payment Handling Fees’’) are recorded as the cost of revenues in the same period as the revenue for the membership fee is recognized.

II)	Advertising revenues

Advertising revenues are derived principally from arrangements where the customers pay to place their advertisements on the Group’s platform in different formats over a particular period of time. Such formats generally includes but not limited to videos, banners, links, logos and buttons. Advertisements on the Group’s platform are generally charged on the basis of duration, and advertising contracts are signed to establish the fixed price and the advertising services to be provided. The Group enters into advertising contracts with third party advertising agencies that represents advertisers, as well as directly with advertisers. A typical contract term would range from a few days to 3 months. Both third party advertising agencies and direct advertisers are generally billed at the end of the display period and payments are due usually within 3 months.

Where the Group’s customers purchase multiple advertising spaces with different display periods in the same contract, the Group allocates the total consideration to the various advertising elements based on their relative fair values and recognizes revenue for the different elements over their respective display periods. The Group determines the fair values of different advertising elements based on the prices charged when these elements were sold on a standalone basis. The Group recognizes revenue on the elements delivered and defers the recognition of revenue for the fair value of the undelivered elements until the remaining obligations have been satisfied. Where all of the elements within an arrangement are delivered uniformly over the agreement period, the revenue is recognized on a straight line basis over the contract period.

Transactions with third party advertising agencies

For contracts entered into with third party advertising agencies, the third party advertising agencies will in turn sell the advertising services to advertisers. Revenue is recognized ratably over the contract period of display based on the following criteria:

—There is persuasive evidence that an arrangement exists—the Group will enter into framework and execution agreements with the advertising agencies, specifying price, advertising content, format and timing

—Price is fixed and determinable—prices charged to the advertising agencies are specified in the agreements, including relevant discount and rebate rates

—Services are rendered—the Group recognizes revenue ratably over the contract period of display

—Collectability is reasonably assured—the Group assesses credit history of each advertising agency before entering into any framework and execution agreements. If the collectability from the agencies is assessed as not reasonably assured, the Group recognizes revenue only when the cash is received and all the other revenue criteria are met.

The Group provides sales incentives in the forms of discounts and rebates to third party advertising agencies based on purchase volume. As the advertising agencies are viewed as the customers in these transactions, revenue is recognized based on the price charged to the agencies, net of sales incentives provided to the agencies. Sales incentives are estimated and recorded at the time of revenue recognition based on the contracted rebate rates and estimated sales volume based on historical experience.

Transactions with third party advertising platforms

Xunlei began to cooperate with third party advertising platforms such as Guangdiantong and Baidu since the fourth quarter in 2015. In this business model, advertisers put their content on third party advertising platforms and platforms will dispatch the advertising content to Xunlei’s platforms by certain analysis systematically. As the third party advertising platforms are viewed as the customers in these transactions, revenue is recognized monthly based on the data publicized on third party platforms and the price charged to these advertising platforms.

Transactions with advertisers

The Group also enters into advertisement contracts directly with advertisers. Under these contracts, similar to transactions with third party advertising agencies, the Group recognizes revenue ratably over the contract period of display. The terms and conditions, including price, are fixed according to the contract between the Group and the advertisers. The Group also performs credit assessment of all advertisers prior to entering into contracts. Revenue is recognized based on the amount charged to the advertisers, net of discounts.

The Group has estimated and recorded sales rebates provided to the agencies and advertisers of USD 5,005 thousand, USD 1,179 thousand and USD 15 thousand for the years ended December 31, 2014, 2015 and 2016, respectively.

III)	Other internet value-added services

i)	Online game revenues

Users play games through the Group’s platform free of charge and are charged for purchases of virtual items including consumable and perpetual items, which can be utilized in the online games to enhance their game-playing experience. Consumable items represent virtual items that can be consumed by a specific user within a specified period of time. Perpetual items represent virtual items that are accessible to the users’ account over the life of the online game.

Pursuant to contracts signed between the Group and game developers, revenue from the sale of virtual items are shared based on a pre-agreed ratio for each game. The Group enters into both non-exclusive and exclusive licensing contracts with game developers.

Non-exclusive game licensed contracts

The games under non-exclusive licensed contracts are maintained, hosted and updated by the game developers. The Group mainly provides access to the platform and limited after-sale services to the game players. The determination of whether to record these revenues using the gross or net method is based on an assessment of various factors; the primary factors are whether the Group acts as the principal in offering services to the game players or as agent in the transaction, and the specific requirements of each contract. The Group determined that for non-exclusive game licensed arrangements, the third party game developers are the principal given that the game developers design and develop the game services offered, have reasonable latitude to establish prices of game virtual items, and are responsible for maintaining and upgrading the game content and virtual items. Accordingly, the Group records online game revenue, net of the portion remitted to the game developers.

Given that online games are managed and administered by the game developers for non-exclusive licensed games, the Group does not have access to the data on the consumption details and the types of virtual items purchased by the game players. The Group has adopted a policy to recognize revenues relating to both consumable and perpetual items over the shorter of 1) estimated lives of the games and 2) the estimated lives of the user relationship with the Group, which were approximately one to ten months for the periods presented.

Adjustments arising from the changes of estimated lives of virtual items are applied prospectively as such changes are resulted from new information indicating a change in the game player behavioral patterns.

Exclusive licensing game contracts

For exclusive licensing contracts with game developers, the games are maintained and hosted by the Group. Accordingly, the Group is determined to be the principal, the Group records online game revenue on a gross basis, with the amount remitted to the game developers reported as cost of revenue. Payment Handling Fees are recognized as cost of revenues when the related revenues are recognized.

For exclusive licensed games which are maintained on the Group’s server, the Group has access to the data on the consumption details and types of virtual items purchased by the game players. The Group does not maintain information on consumption details of virtual items, and only have limited information related to the frequency of log-ons. Given that a substantial portion of the virtual items purchased by the game players in exclusive licensed games are perpetual items, management determined that it would be most appropriate to recognize revenue over the shorter of 1) estimated lives of the games and 2) the estimated lives of the user relationship with the Group, which were approximately one to six months for the periods presented. Revenues related to consumable items are recognized immediately upon consumption.

Game players can purchase prepaid virtual items which can be used to purchase virtual items via online channels. The Group incurs service fees levied by those payment channels, and such payment expenses are recorded as the cost of revenues when the related revenues are recognized.

For both non-exclusive and exclusive licensed games, the Group estimates the life of virtual items to be the shorter of the estimated lives of the games and the estimated lives of the user relationship. The estimated user relationship period is based on data collected from those users who have purchased virtual items. To estimate the life of the user relationship, the Group maintains a software system that captures the following information for each user: the date of first log-on, the date the user ceases to play the game and frequency of log-ons. The Group estimates the life of the user relationship to be the weighted average period from the first purchase of a virtual item to the date the user ceases to play the game based on the frequency of log-ons.

To estimate the life of the games, the Group considers both games that they operate as well as games in the market that are of a similar nature. The Group categorizes these games by their nature, such as simulation games, role playing games and others, which appeal to players belonging to different demographics. The Group estimates that the life of each group of the games to be the average period from the date of launch for such games to the date the games are expected to be removed from the website or terminated altogether. When the Group launches a new game, they estimate the life of the game and user relationship based on lives of other similar games in the market until the new game establishes its own history. The Group also considers the game’s profile, attributes, target audience, and its appeal to players of different demographic groups in estimating the user relationship period.

The consideration of user relationship with each online game is based on the Group’s best estimate that takes into account all known and relevant information at the time of assessment. Adjustments arising from the changes of estimated lives of virtual items are applied prospectively as such changes are resulted from new information indicating a change in the game player behavioral patterns. Any changes in the estimates of lives of virtual items may result in the Group’s revenues being recognized on a basis different from prior periods and may cause the Group’s operating result to fluctuate. The Group periodically assesses the estimated lives of the virtual items and any changes from prior estimates are accounted for prospectively. Any adjustments arising from changes in user relationship as a result of new information will be accounted as a change in accounting estimate in accordance with ASC 250 Accounting Changes and Error Corrections.

ii)	Content sub-licensing revenue

With the exclusive Content Copyrights, the Group has the right to sub-license the broadcasting rights to third parties. The Group generates revenue from sub-licensing these broadcasting rights on a recurring basis to third party customers for cash, mainly video streaming internet platforms, for cash payments at a fixed rate for a fixed period of time that falls within the original exclusive license period. Revenue is recognized in full at the later of the delivery of the master copy of the content with acceptance acknowledged by the customers and the commencement of the license period, as the Group is not obliged to provide any other services. The Group performs credit assessment of its customers prior to entering into contracts to ensure that collection of the arrangement fee is reasonably assured. There is no ongoing obligation of the Group after delivery of the master copy of the content. Content sub-licensing revenue was discontinued in July 2015 as a result of the divestiture of the Company’s online video streaming platform (see note 3 for details). The Group recognized content sub-licensing revenue from discontinued operations of USD 9,218 thousand, USD 2,929 thousand and nil for the years ended December 31, 2014, 2015 and 2016, respectively.

iii)	Pay per view subscription revenue

The Group operates a pay per view subscription program in which subscribers pay a monthly fee to watch and have access to a collection of movie contents. The subscription fee is time-based and is collected up-front from subscribers except in the cases where they elect to pay via their mobile operators. The subscription fee is collected when the subscribers pay for their monthly phone fees. The terms of time-based subscriptions range from one month to twelve months, with the subscribers having the option to renew the contract. The receipt of revenue is initially recorded as deferred revenue and revenue is recognized ratably over the period of subscription as services are rendered.

iv)	Live video revenue

Live video was launched in 2015 as a new service of Xunlei. Users can purchase virtual items which they can then send to performers in the live videos. The revenue from live video is recognized at fair value of the virtual items, as Xunlei is the principal in this arrangement, based on actual consumption of virtual items by the paying users.

v)	Revenues from traffic referral programs

The Group enters into contracts with certain third party portals/websites to earn revenue by redirecting online traffic to these third party portals/websites. On a monthly basis, the Group receives data on the user traffic and the related monthly revenue from these third party portals/ websites. Under these programs, the Group recognizes its share of revenues based on contractual rates applied to user traffic redirected to the advertisements of the third parties

vi)	Revenues from cloud computing

As part of the Group’s cloud computing service, Project Crystal, the Group engages in sale of zhuanqianbao (“ZQB”). ZQB is a hardware which could be worked as a micro-computer based on Linux system, it also contains CPU, RAM, ROM and input/output devices. ZQB also allows users to share their idle bandwidth with the Group, in exchange for crystal points.

Crystal points, which can be converted into cash based on a pre-set exchange rate, will only be given to the users when they successfully shared unused bandwidth with the Group. Therefore, the Group receives an identifiable benefit, being the bandwidth, from the users in exchange for the crystal points which the Group can reasonably estimate the fair value of this benefit. The Group determined that ZQB sold to users represent identifiable benefit to the users that is separable from the ability to sell bandwidth back to the Group and the bandwidth purchased from the users represent identifiable benefit to the Group, which the Group can reasonably estimate the fair value of this benefit, that is separable from ZQB.

The sales of ZQB and purchase of excess bandwidth by the Group are considered separate transactions. Therefore, sales of ZQB are reported as revenue, while crystal points given for purchase of bandwidth are reported as bandwidth cost.

The Group sells ZQB through online e-commerce platforms. The revenue from ZQB is recognized when the item is dispatched to the end customers.

The core business principle of cloud computing is to collect idle uplink capacity from individual with compensation, and sells to online video streaming platforms. On a monthly basis, the Group records the bandwidth it delivers and recognize revenue from these online video streamers under contractual rates applied (price per GB of bandwidth multiplies total GBs of bandwidth per month). The cost of collecting unused bandwidth is recorded as bandwidth costs within cost of revenue.

(s)

Barter transactions

The Group also enters into agreements with third parties (mainly video streaming internet platform) to exchange content. The exchanged content provides rights for each respective party only to broadcast the content received on its own website; though, each party retains the right to continue broadcasting and or sub-license the rights to the content it surrendered in the exchange. These transactions are non-monetary transactions similar to barter transactions, and the Group follows ASC 845, Non-Monetary Transactions and ASC 360-10, Property, Plant, and Equipment. Such barter transactions should be recorded at fair value of the surrendered assets in the transaction unless such fair value are not determinable within reasonable limits. The Group estimated the fair value of the content by gathering ‘‘price reference’’ of cash sub-licensing transactions of each exclusive content right and categorizing it into two buckets (1) cash transaction prices with established counterparties and (2) cash transaction prices with less established counterparties. With this information, the Group calculates an ‘‘average cash transaction price’’ for each category to be used as a reference for the non-monetary transaction. The attributable cost of the related exclusive Content Copyright surrendered is released and recorded as the cost of the barter transaction using the individual-film-forecast computation method. This method calculates such cost based on the ratio of the estimated fair value of the exchanged content over the aggregated estimated fair value to be generated by the exclusive Content Copyrights for their whole license period or estimate useful lives. The Group revisits the forecast at each quarter or year end and make adjustment, when appropriate.

The Group generated net gains amounted to nil (2014:USD1,556 thousand, 2015: USD137 thousand) from barter transactions, which is the net amount of proceeds of nil (2014:USD4,428 thousand, 2015: USD409 thousand), after deducting related allocation of cost of nil (2014:USD2,606 thousand, 2015: USD247 thousand) and business tax and surcharge of nil (2014:USD266 thousand, 2015: USD25 thousand).

(t)

Sales and marketing expenses

Sales and marketing expenses comprise primarily of salary, commission and benefits of sales and marketing personnel and external advertising and market promotion expenses. The external advertising and market promotion expenses from continuing operations amounted to approximately USD 5,978 thousand, USD 8,089 thousand and USD 10,008 thousand for the years ended December 31, 2014, 2015 and 2016, respectively.

(u)

General and administrative expenses

General and administrative expenses consist primarily of salary and benefits, professional service fees, legal expenses and other administrative expenses.

(v)

Research and development costs

The Group incurred research and development costs to develop its downloading software. Costs incurred during the research phase are expensed as incurred. Costs incurred for the development of the downloading software prior to the establishment of technological feasibility, which is when a working model is available, are expensed when incurred. The development costs qualified for capitalization have been immaterial for the periods presented.

The Group also incurred development costs in connection with an internal-use ERP software to further enhance management to monitor the business. While internal and external costs incurred during the preliminary project stage are expensed as incurred, costs relating to activities during the application development stages have been capitalized. During each of the three years ended December 31, 2016, no software development costs were capitalized as intangible assets.

In addition, the Group incurred other research and development costs in relation to software used to support its operations. Any development costs qualified for capitalization have been immaterial for the periods presented.

(w)

Taxation and uncertain tax positions

Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statements’ carrying amounts of existing assets and liabilities and their respective tax bases and tax loss carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which the difference is expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the consolidated statement of operations in the period that includes the enactment date. A valuation allowance is provided to reduce the carrying amount of deferred tax assets if it is considered more likely than not that some portion, or all, of the deferred tax assets will not be realized. The estimation of future taxable income involves significant judgement and estimates. Based on management's estimated future taxable income, management concluded that it is more likely than not that the net operating losses carried forward can be utilized prior to their respective expiration dates. On January 1, 2007, the Group adopted the guidance regarding uncertain tax positions and evaluated its open tax positions that exist in each jurisdiction for each reporting period. If an uncertain tax position is taken or expected to be taken in a tax return, the tax benefit from that uncertain position is recognized in the Group’s consolidated financial statements if it is more likely than not that the position is sustainable upon examination by the relevant taxing authority. The Group did not have any significant uncertain tax position and there was no effect on its financial condition or results of operations as a result of implementing the new guidance. The Group recognizes interest and penalties accrued on any unrecognized tax benefits as a component of income tax expense, if any. Nevertheless, no significant interest and penalties were recorded in the years ended December 31, 2014, 2015 and 2016.

Transition from PRC Business Tax to PRC Value Added Tax

Effective September 1, 2012, the Chinese government has begun a pilot program (the “Pilot Program”) for transition from imposing business tax to imposing of value added tax (“VAT”) for revenues generated in certain industries. The Pilot Program has been expanded from Shanghai to eight other cities and provinces in China, including Beijing and Shenzhen. The Group’s advertising and content sub-licensing revenues are subject to the Pilot Program since November 1, 2012, and its subscription revenue, online game revenue and pay per view subscription revenue are subject to the Pilot Program since June 1, 2014. Business Tax has been imposed primarily on revenues from the provision of taxable services, assignments of intangible assets and transfers of real estate.

VAT payable on goods sold or taxable labor services provided by a general VAT taxpayer for a taxable period is the net balance of the output VAT for the period after crediting the input VAT for the period. Before the implementation of the Pilot Program, the Group was mainly subject to a small amount of VAT mainly for revenues of the sale of software. VAT has been imposed on those revenues at a rate of 17%. With the implementation of the Pilot Program, in addition to the revenues currently subject to VAT, the Group’s advertising revenues, subscription revenue, online game revenue, revenue from cloud computing and live video revenue are in the scope of the Pilot Program and are now subject to VAT at a rate of 6%.

(x)

Retirement benefits

Full-time employees of the Company’s subsidiaries, consolidated VIE and its subsidiaries in the PRC participate in a government mandated multi-employer defined contribution plan pursuant to which certain pension benefits, medical care, unemployment insurance, employee housing fund and other welfare benefits are provided to employees. Chinese labor regulations require that the subsidiaries and VIEs of the Company make contributions to the government for these benefits based on certain percentages of the employees’ salaries. The Group has no legal obligation for the benefits beyond the contributions made. The total amounts for such employee benefits, which are expensed as incurred, were USD3,818 thousand, USD5,481 thousand and USD9,237 thousand for the years ended December 31, 2014 , 2015 and 2016, respectively.

(y)

Share-based compensation

The Group measures share-based compensation at the grant date based on the fair value of the award determined using the Black-Scholes option pricing model. As the Group has granted share options and restricted shares with service-only condition, the Group elected to recognize compensation costs net of estimated forfeitures on a straight line basis over the requisite service period, which is generally the same as the vesting period. The amount of compensation cost recognized at any date is at least equal to the portion of the grant-date value of the award that is vested at that date.

(z)

Government subsidies

The Group receives subsidies from the local PRC government for general use or purchase of equipment. General-use subsidies which are not subject to any conditions or specific use requirements are recorded as subsidy income in the consolidated statements of operations. Subsidies for purchase of equipment are recorded as deferred government grant when received, and are recorded as other income over the expected useful life of the assets after the related equipment has been purchased.

(aa)

Segment reporting

The Group’s Chief Executive Officer has been identified as the chief operating decision maker (“CODM”), who reviews consolidated operating results of the Group when making decisions about allocating resources and assessing performance of the Group as a whole. The Group has internal reporting of revenue, cost and expenses that does not distinguish between segments, and reports costs and expense by nature as a whole. The Group does not distinguish between markets or segments for the purpose of internal reporting. Management has determined that the Group operates and manages its business as a single segment which is the operation of its online media platform. All revenues of the Group are derived from mainland China.

An analysis of the different types of revenues for the years ended December 31, 2014, 2015 and 2016 are summarized as follows:

Revenue from continuing operations	Years ended December 31,
(In thousands)	2014		2015		2016
Subscription revenue		98,189		82,435		90,163
Advertising revenue		5,834		4,802		16,874
Other internet value-added services (note a)		31,789		42,759		49,929
Total		135,812		129,996		156,966

note a:

Other internet value-added services mainly comprise revenue from online game, traffic referral programs, technical services regarding online acceleration, online sales revenue, sales of software licenses, cloud computing revenue (including revenue from sale of ZQB and idle bandwidth) and live video.

(bb)

Net income / (loss) per share

Net basic income / (loss) per share is computed by dividing net income / (loss) attributable to holders of common shares by the weighted-average number of common shares outstanding during the year using the two class method. Using the two class method, net income / (loss) is allocated between common shares and other participating securities based on their participating rights.

Net diluted income / (loss) per share is calculated by dividing net income / (loss) attributable to common shareholders as adjusted for the effect of dilutive common equivalent shares, if any, by the weighted-average number of common and dilutive common equivalents shares outstanding during the year. Dilutive equivalent shares are excluded from the computation of diluted income / (loss) per share if their effects would be anti-dilutive. Common share equivalents consist of the common shares issuable in connection with the Group’s convertible non-redeemable and redeemable preferred shares using the if-converted method, and common shares issuable upon the conversion of the stock options, using the treasury stock method.

(cc)

Comprehensive income

Comprehensive income is defined as the change in equity of a Group during the period from transactions and other events and circumstances excluding transactions resulting from investments from shareholders and distributions to shareholders. Accumulated other comprehensive income, as presented on the accompanying consolidated balance sheets, consists of cumulative translation adjustment.

(dd)

Profit appropriation and statutory reserves

The Group’s subsidiaries, consolidated VIE and its subsidiaries incorporated in the PRC are required on an annual basis to make appropriations of retained earnings set at certain percentage of after-tax profit determined in accordance with PRC accounting standards and regulations (“PRC GAAP”). Appropriation to the statutory general reserve should be at least 10% of the after-tax net income determined in accordance with the legal requirements in the PRC until the reserve is equal to 50% of the entities’ registered capital. The Group is not required to make appropriation to other reserve funds and the Group does not have any intentions to make appropriations to any other reserve funds.

The general reserve fund can only be used for specific purposes, such as setting off the accumulated losses, enterprise expansion or increasing the registered capital. Appropriations to the general reserve funds are classified in the consolidated balance sheets as statutory reserves.

There are no legal requirements in the PRC to fund these reserves by transfer of cash to restricted accounts, and the Group does not do so.

The following table presents the balances of registered capital, additional paid-in-capital and statutory reserves of entities within the Group incorporated in China as of December 31, 2015 and 2016 for the Group’s reporting purpose in China as determined under generally accepted accounting principles in China:

	December 31,		December 31,
(In thousands)	2015		2016
Paid-in capital		112,435		118,733
Additional paid-in capital		161		161
Statutory reserves		5,132		5,132
Total		117,728		124,026

Relevant laws and regulations permit payments of dividends by the PRC subsidiaries and affiliated companies only out of their retained earnings, if any, as determined in accordance with respective accounting standards and regulations. Accordingly, the above balances are not allowed to be transferred to the Company in terms of cash dividends, loans or advances (See also Note 29).

(ee)

Dividends

Dividends are recognized when declared. No dividends were declared for the years ended December 31, 2014, 2015 and 2016, respectively. The Group does not have any present plan to pay any dividends on common shares in the foreseeable future. The Group currently intends to retain the available funds and any future earnings to operate and expand its business.

(ff)

Recent accounting pronouncements

On February 18, 2015, the FASB issued Accounting Standards Update 2015-02, Consolidation (Topic 810) –Amendments to the Consolidation Analysis. The new guidance applies to entities in all industries and provides a new scope exception to registered money market funds and similar unregistered money market funds. It provide new guidance to companies in determining whether an entity is a variable interest entity (VIE), assessing fees paid to a decision maker or a service provider, and consideration of related parties in the economics test. The standard is effective for public business entities for annual periods beginning after December 15, 2015. This new guidance did not have significant impact to the Group's existing structure.

In July 2015, the FASB issued Accounting Standards Update 2015-11, Inventory (Topic 330) –Simplifying the Measurement of Inventory. The amendments apply to inventory that is measured using the first-in, first-out (FIFO) or average cost method. The main change is in the subsequent measurement guidance from the lower of cost or market to the lower of cost and net realizable value for inventory within the scope of this Update. Market could be replacement cost, net realizable value, or net realizable value less an approximately normal profit margin. An entity should measure inventory within the scope of this Update at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. The amendments in this Update are effective for public business entities for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The amendments in this update should be applied prospectively with earlier application permitted as of the beginning of an interim or annual reporting period. The adoption of this ASU is not expected to have significant impact to the Group’s consolidated financial statements.

In November 2015, the FASB issued ASU 2015-17, Income Taxes: Balance Sheet Classification of Deferred Taxes. ASU 2015-17 simplifies the presentation of deferred income taxes, which require the deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position. ASU 2015-17 is effective for fiscal years and interim periods within those years beginning after December 15, 2016. . The Group believes that this ASU will have an impact on the Group’s consolidated balance sheet and related disclosures.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments–Overall: Recognition and Measurement of Financial Assets and Financial Liabilities. The new guidance will impact the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. In addition, the FASB clarified the need for a valuation allowance on deferred tax assets resulting from unrealized losses on available-for-sale debt securities. The accounting for other financial instruments, such as loans, investments in debt securities, and financial liabilities not under the fair value option is largely unchanged. The standard is effective for public business entities for annual periods (and interim periods within those annual periods) beginning after December 15, 2017. The adoption of this ASU is not expected to have significant impact to the Group’s consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The core principle of Topic 842 is that a lessee should recognise the assets and liabilities that arise from leases. A lessee should recognise in the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognise lease assets and lease liabilities. If a lessee makes this election, it should recognize lease expense for such leases generally on a straight-line basis over the lease term. ASU 2016-02 is effective for fiscal years and interim periods within those years beginning after December 15, 2018. Early adoption is permitted. The Group is currently evaluating the impact ASU2016-02 will have on the Group consolidated balance sheet, results of operations, cash flows and related disclosures.

On 30 March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The amendments in ASU 2016-09 affect all entities that issue share-based payment awards to their employees and involve multiple aspects of the accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. All excess tax benefits and tax deficiencies (including tax benefits of dividends on share-based payment awards) should be recognized as income tax expense or benefit in the income statement. The tax effects of exercised or vested awards should be treated as discrete items in the reporting period in which they occur. An entity also should recognize excess tax benefits regardless of whether the benefit reduces taxes payable in the current period. Tax benefits should be classified along with other income tax cash flows as an operating activity. An entity can make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest (consistent with current GAAP) or account for forfeitures when they occur. Under current GAAP, one of the requirements for an award to qualify for equity classification is that an entity cannot partially settle the award in cash in excess of the employer's minimum statutory withholding requirements. Under ASU 2016-09, the threshold to qualify for equity classification permits withholding up to the maximum statutory tax rates in the applicable jurisdictions. Cash paid by an employer when directly withholding shares for tax withholding purposes should be classified as a financing activity. For public business entities, ASU 2016-09 is effective for annual periods beginning after 15 December 2016, and interim periods within those annual periods. The Group is currently evaluating the impact ASU2016-09 will have on the Group consolidated balance sheet, results of operations, cash flows and related disclosures.

The FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force), on August 26, 2016, and ASU 2016-18, Statement of Cash Flows (Topic 230), Restricted Cash (a consensus of the Emerging Issues Task Force), on November 17, 2016. The new guidance is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. For public business entities, both ASUs are effective for financial statements issued for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. For all other entities, the guidance is effective for financial statements issued for fiscal years beginning after December 15, 2018, and interim periods within fiscal years beginning after December 15, 2019. Early adoption is permitted for ASU 2016-18. Early adoption is also permitted for ASU 2016-15 provided that all of the amendments are adopted in the same period. Both ASUs require application using a retrospective transition method. The Group is currently evaluating the impact ASU2016-15 and ASU2016-18 will have on the Groups consolidated balance sheet, results of operations, cash flows and related disclosures.

In 2016, the FASB and IASB issued several amendments and clarifications to the new revenue standards, primarily as a result of issues raised by stakeholders and discussed by the Transition Resource Group. Amendments were made to the guidance related to the principal versus agent assessment, identifying performance obligations, accounting for licenses of intellectual property, and other matters (such as the definition of completed contracts at transition, the addition of new practical expedients, and various technical corrections). As amended, the FASB's standard is effective for public entities for the first interim period within annual reporting periods beginning after December 15, 2017 (nonpublic companies have an additional year). The FASB’s standard will allow early adoption, but no earlier than the original effective date for public entities (reporting periods beginning after December 15, 2016). The IASB’s standard, as amended, is effective for the first interim period within annual reporting periods beginning on or after January 1, 2017, with early adoption permitted. The Group is currently evaluating the impact that will have on the Groups consolidated balance sheet, results of operations, cash flows and related disclosures.

In January 2017, the FASB issued Accounting Standards Update (“ASU”) No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business, which clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions or disposals of assets or businesses. The standard is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. The standard should be applied prospectively on or after the effective date. The Group is currently evaluating the impact ASU2017-01 will have on the Groups consolidated balance sheet, results of operations, cash flows and related disclosures.

In January 2017, the FASB issued Accounting Standards Update (“ASU”) 2017-04, “Simplifying the Test for Goodwill Impairment.” The guidance removes Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The guidance should be adopted on a prospective basis for the annual or any interim goodwill impairment tests beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Group is currently evaluating the impact ASU2017-04 will have on the Groups consolidated balance sheet, results of operations, cash flows and related disclosures.

Discontinued operations

12 Months Ended

Dec. 31, 2016

Discontinued operations [Abstract]

Discontinued operations

3.	Discontinued operations

In July 2015, the Company completed the divesture of the Company’s entire stake in its online video streaming platform, Xunlei Kankan to Beijing Nesound International Media Corp., Ltd., an independent third party. The total sales price was RMB 130,000 thousand (USD 21,183 thousand). The disposal is due to a shift of strategy focusing on the Group’s most competitive operations.

Assets and liabilities related to Xunlei Kankan were reclassified as assets/liabilities held for sale as of December 31, 2014, while results of operations related to Xunlei Kankan, including comparatives, were reported as loss from discontinued operations.

Results of the discontinued operation

USD (In thousands)	2014		2015		2016
Revenues, net of rebates and discounts		47,075		15,677		—
Business taxes and surcharges		(1,480)		(447)		—
Net revenues		45,595		15,230		—
Cost of revenues		(42,704)		(13,240)		—
Gross profit		2,891		1,990		—
Operating expenses
Research and development expenses		(6,035)		(3,245)		5
Sales and marketing expenses		(15,726)		(7,384)		(27)
General and administrative expenses		(3,016)		(3,051)		(221)
Total operating expenses		(24,777)		(13,680)		(243)
Net gain from exchanges of content copyrights		1,556		137		—
Operating loss		(20,330)		(11,553)		(243)
Gain on disposal of Kankan		—		1,505		—
Income taxes benefits/(expenses)		1,923		(2,048)		36
Loss from discontinued operations		(18,407)		(12,096)		(207)

Assets and liabilities of the discontinued operation

USD (In thousands)	December 31, 2014
Assets
Accounts receivable, net		23,741
Prepayments and other current assets		670
Copyrights related to content-current portion		16,013
Property and equipment, net		1,111
Intangible assets		4,997
Prepayment for content		456
Other long-term prepayments and receivables		57
Total assets held for sale		47,045

Liabilities
Accounts payables		25,267
Deferred revenue, current portion		1,018
Accrued liabilities and other payables		1,082
Total liabilities held for sale		27,367

Cash flows generated from/ (used in) discontinued operations

USD (In thousands)	2014		2015		2016
Net cash generated from/(used in) operating activities		2,293		(1,554)		(215)
Net cash (used in)/generated from investing activities		(34,661)		9,135		—
Net cash used in financing activities		—		—		—
Net cash flow for the year		(32,368)		7,581		(215)

The disposal of the online video streaming platform was completed on July 15, 2015 and a gain of USD1,505 thousand was recognized.

The entire disclosure related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 205
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 205
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
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Reference 12: http://www.xbrl.org/2003/role/presentationRef
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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Cash and cash equivalents [Abstract]

Cash and cash equivalents

12 Months Ended

Dec. 31, 2016

Cash and cash equivalents

Cash and cash equivalents represent cash on hand, cash held at bank, and time deposits placed with banks or other financial institutions, which have original maturities of three months or less. Cash on hand and cash held at bank balance as of December 31, 2015 and 2016 primarily consist of the following currencies:

	December 31, 2015				December 31, 2016
			USD				USD
(In thousands)	Amount		equivalent		Amount		equivalent
RMB		606,845		93,454		538,660		77,651
USD		268,198		268,198		121,726		121,726
HKD		969		125		987		127
Total				361,777				199,504

Time deposits with original maturities of three months or less as of December 31, 2015 and 2016 primarily consist of the following currencies:

	December 31, 2015				December 31, 2016
			USD				USD
(In thousands)	Amount		equivalent		Amount		equivalent
RMB		349,099		53,760		—		—
USD		260,597		260,597		115,944		115,944
Total				314,357				115,944

The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify.

Accounts receivable, net

12 Months Ended

Dec. 31, 2016

Accounts receivable, net [Abstract]

Accounts receivable, net

	December 31,		December 31,
(In thousands)	2015		2016
Accounts receivable		11,392		14,655
Less: Allowance for doubtful accounts		(126)		(119)
Accounts receivable, net		11,266		14,536

The accounts receivable that was fully reserved as of December 31, 2015 and 2016 was USD 0.1 million and USD 0.1 million, respectively.

The following table presents movement in the allowance for doubtful accounts:

	December 31,		December 31,		December 31,
(In thousands)	2014		2015		2016
Balance at beginning of the year		—		131		126
Additions		523		4		—
Write-off		(393)		—		—
Exchange difference		1		(9)		(7)
Balance at end of the year		131		126		119

The top 10 customers accounted for about 39% and 76% of accounts receivable as of December 31, 2015 and 2016, respectively.

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

Prepayments and other assets [Abstract]

Prepayments and other assets

12 Months Ended

Dec. 31, 2016

Prepayments and other assets

7.	Prepayments and other assets

	December 31,		December 31,
(In thousands)	2015		2016
Current portion:
Advance to suppliers		882		2,392
Interest-free loans to employees (note a)		3,200		3,964
Advance to employees for business purposes		957		351
Interest receivable		564		210
Rental and other deposits		224		1,014
Prepayment for share repurchase plan (note b)		712		—
Prepaid management insurance		209		145
Receivable from Nesound (note c)		4,004		3,748
Prepayment for taxation		2,041		1,392
Others		275		377
Total of prepayments and other current assets		13,068		13,593
Non-current portion:
Prepayments for online game licenses		4,786		490
Long term receivable		1,812		—
Low-interest loans to employees, non-current portion (note d)		833		697
Total of long-term prepayments and other assets		7,431		1,187

	Note a:	The Group had entered into loan contracts with certain employees as at December 31, 2015 and 2016, under which the Group provided interest-free loans to these employees. The loan amounts vary amongst different employees and are repayable on demand.

	Note b:	As of December 31, 2015, the prepayment for share repurchase plan represented prepayment made to a securities broker for a share repurchase program up to USD 20 million announced in December 2014. In January 2016, the Company announced another share repurchase program to purchase up to USD 20 million shares and prepaid USD 0.7 million to a securities broker. As of December 31, 2016, all the prepayment has been utilized.

	Note c:	The Group sold Kankan to Nesound in July 2015. As at December 31, 2016, there is a balance receivable amounted to USD 3,748 thousand which was past due. The Group have brought the claim against Nesound to the arbitration tribunal and considered that the balances can be collected in full.

	Note d:	The Group had entered into loan contracts with certain employees as at December 31, 2015 and 2016, under which the Group provided low-interest loans to these employees. The loan amounts vary amongst different employees and are repayable in equal instalments on a monthly basis over the term of 10 years.

Property and equipment

12 Months Ended

Dec. 31, 2016

Property and equipment [Abstract]

Property and equipment

Property and equipment

Property and equipment consist of the following:

	December 31,		December 31,
(In thousands)	2015		2016
Servers and network equipment		37,332		42,641
Computer equipment		1,544		1,538
Furniture, fixtures and office equipment		856		845
Motor vehicles		320		299
Leasehold improvements		2,504		2,794
Total original costs		42,556		48,117
Less: Accumulated depreciation		(24,534)		(27,675)
Sub-total		18,022		20,442
Construction in progress		14		574
Total		18,036		21,016

Depreciation expense recognized for the years ended December 31, 2014, 2015 and 2016 are summarized as follows:

	December 31,		December 31,		December 31,
(In thousands)	2014		2015		2016
Cost of revenues		5,652		5,003		5,848
General and administrative expenses		715		628		306
Sales and marketing expenses		123		7		5
Research and development expenses		10		8		6
Total		6,500		5,646		6,165

No impairment loss had been recognized for the years ended December 31, 2014, 2015 and 2016.

Intangible assets, net

12 Months Ended

Dec. 31, 2016

Intangible assets, net [Abstract]

9.	Intangible assets, net

	December 31, 2015								December 31, 2016
							Net book								Net book
(In thousands)	Cost		Amortization		Impairment		value		Cost		Amortization		Impairment		value
Land use rights		5,123		(409)		—		4,714		4,796		(543)		—		4,253
Trademarks		5,812		(1,107)		—		4,705		5,441		(1,814)		—		3,627
Non-compete agreement		1,415		(472)		—		943		1,325		(773)		—		552
Technology (including right-to-use)		2,261		(377)		—		1,884		2,117		(617)		—		1,500
Acquired computer software		619		(255)		—		364		884		(420)		—		464
Internal use software development costs		675		(641)		—		34		631		(631)		—		—
Online game licenses (note)		5,827		(4,268)		(770)		789		5,454		(4,383)		(721)		350
		21,732		(7,529)		(770)		13,433		20,648		(9,181)		(721)		10,746

Note:

As of December 31, 2015 and 2016, full provision for impairment has been provided for an online game license due to significant under-performance in the past.

Amortization expense recognized for the years ended December 31, 2014, 2015 and 2016 are summarized as follows:

	Years ended December 31
(In thousands)	2014		2015		2016
Cost of Revenues		1,141		693		403
General and administrative expenses		372		386		323
Research and development expenses		542		1,589		1,497
Total		2,055		2,668		2,223

The estimated aggregate amortization expense for each of the next five years as of December 31, 2016 is:

(In thousands)	Intangible assets
2017		2,057
2018		1,623
2019		1,251
2020		1,233
2021 and thereafter		4,582

The weighted average amortization periods of intangible assets as at December 31, 2015 and 2016 are as below:

	December 31,		December 31,
(In year)	2015		2016
Land use right		30		30
Trademarks		7		7
Non-compete agreement		4		4
Technology (including right-to-use)		8		8
Acquired computer software		5		5
Internal use software development costs		5		5
Online game licenses		3		3
Total weighted average amortization periods		11		11

Inventories

12 Months Ended

Dec. 31, 2016

Inventories [Abstract]

Deferred revenue and income [Abstract]

10. Inventories

	December 31,		December 31,
(In thousands)	2015		2016
ZQB (note a)		92		31
XZB (note b)		76		152
Online shopping mall inventories (note c)		153		47
Others		159		144
Total		480		374

Note a:	ZQB, a proprietary hardware connected to users’ network routers, can allocate users’ idle uplink capacity to the Company for further allocation to internet content providers.

Note b:	XZB is a personal cloud hardware, which can remotely control downloading through mobile phones or computers, to expand storage of terminals unlimitedly and share data in cloud storage.

Note c:	online shopping mall inventories include Xiaomi TV box, gaming discs etc.

Long-term investments

12 Months Ended

Dec. 31, 2016

Long-term investments [Abstract]

Long-term investments

11.

Long-term investments

	December 31,		December 31,
(In thousands)	2015		2016
Equity method investments:
Balance at beginning of the year		2,965		2,162
Additions (i)		—		1,442
Disposal (iii)		—		(701)
Share of loss from equity investees		(12)		(195)
Dilution gains arising from deemed disposal of investments (iv)		702		—
Transfer to cost method investments		(1,349)		(786)
Exchange differences		(144)		(132)
Balance at end of the year		2,162		1,790
Cost method investments:
Balance at beginning of the year		2,533		9,157
Additions (i)(ii)		6,506		32,707
Disposal (iii)		—		(2,220)
Dilution gains arising from deemed disposal of investment (iii)(iv)		—		689
Transfer from equity method investments		1,349		786
Exchange difference		(429)		(463)
Less: impairment loss on long-term investments		(802)		(1,654)
Balance at end of the year		9,157		39,002

Total long-term investments		11,319		40,792

Details of the Group’s ownership are as follows:

	Percentage of ownership of shares
	as of December 31,
Investee	2015			2016
Equity method investments:
Zhuhai Qianyou Technology, Co., Ltd. (“Zhuhai Qianyou”),		19.00	%		19.00	%
Guangzhou Yuechuan Network Technology, Co., Ltd. (“Guangzhou Yuechuan”) (iii)		19.13	%		—
Shenzhen Xunlei Big Data Information Service Co., Ltd. (“Big Data”) (i)		—			43.16	%
Cost method investments:
Guangzhou Yuechuan Network Technology, Co., Ltd. (“Guangzhou Yuechuan”) (iii)		—			9.30	%
Shenzhen Kushiduo Network Science and Technology Co., Ltd. (“Shenzhen Kushiduo”)(ii)(iv)		12.5	%		10.00	%
Shanghai Guozhi Electronic Technology Co., Ltd. (“Shanghai Guozhi”)		21.00	%		16.80	%
Guangzhou Wucai Information Technology Co., Ltd.(“Guangzhou Wucai”) (v)		10.00	%		—
Guangzhou Hongsi Network Technology Co., Ltd.(“Guangzhou Hongsi”)		19.90	%		19.90	%
Tianjin Kunzhiyi Network Technology Co., Ltd.(“Tianjin Kunzhiyi”) (iv)		19.99	%		—
Chengdu Diting Technology, Co., Ltd. (“Chengdu Diting”) (iv)		13.27	%		12.74	%
Suzhou Heidisi Network Technology Co., Ltd.("Suzhou Heidisi") (ii) (v)		19.90	%		—
Xiamen Diensi Network Technology Co., Ltd.("Xiamen Diensi") (i)(ii)(iv)		15.00	%		14.25	%
Nanjing Qianyi Video Information Technology Co., Ltd.("Nanjing Qianyi") (ii)(iii)		20.00	%		—
11.2 Capital I, L.P. ("11.2 Capital") (ii)		2.24	%		2.05	%
Cloudtropy (i)(ii)		1.13	%		9.69	%
Shanghai Lexiang Technology Co., Ltd. ("Shanghai Lexiang") (i)		—			15.00	%
Hangzhou Feixiang Data Technology Co., Ltd. ("Hangzhou Feixiang") (i)		—			20.00	%
Shenzhen Meizhi Interactive Technology Co., Ltd. ("Meizhi Interactive") (i)(iv)		—			8.13	%
Beijing Yunhui Tianxia Technology Co., Ltd. ("Yunhui Tianxia") (i)		—			7.50	%
Arashi Vision Interative (Cayman) Inc. ("Insta 360") (i)		—			11.46	%

Cloudin Technology (Cayman) Limited ("Cloudin") (i)		—			4.47	%
Shenzhen RenJian RenAi Networking Technology Co., Ltd. (“RenJian RenAi”)		—			—

(i)	In 2016, the Group made an equity investment in a privately-held company, Big Data, of USD 1,442 thousand for 43.16% equity interest. The Group classified Big Data as an equity method investment as it had only significant influence instead of control over Big Data.

In 2016, the Group also made equity investments in seven unrelated privately-held companies for aggregate consideration of USD 28,242 thousand. The shares held by the Group are not in-substance common stock and therefore the Group accounted for these investments according to ASC 320 as equity activities using the cost method. In addition, the Group increased its investment in Cloudtropy from 1.13% to 9.69% equity interest at a consideration of USD 3,780 thousand. The Group also participated in a new round of financing of Xiamen Diensi to the extent of USD 700 thousand while the Group’s equity interest in Xiamen Diensi diluted from 15% to 14.25% by other investors.

(ii)

In 2015, the Group made equity investments in five more unrelated privately-held companies. The shares held by the Group are not in-substance common stock and therefore the Group accounted for these investments according to ASC 320 as equity activities using the cost method. In August 2015, the Group increased investment of USD 39 thousand to purchase 25 thousand shares of Shenzhen Kushiduo. As a result, the Group's ownership interest in Shenzhen Kushiduo increased from 10% to 12.5%.

(iii)

In January 2016, the Group disposed of 9% interest in Guangzhou Yuechuan with a carrying value of USD 701 thousand at a consideration of approximately USD 1.3 million. As a result of the disposal, the Group’s interest in Guangzhou Yuechuan decreased from 19.13% to 10.13% and transferred this investment from equity method to cost method as the Group no longer has significant influence over this investee. At the same time, Guangzhou Yuechuan also issued certain new shares to a third party and the Group’s interest in Guangzhou Yuechuan diluted from 10.13% to 9.3% with a dilution gain of USD 69 thousand arising from the deemed disposal. In addition, the Group also disposed of its entire interest in Nanjing Qianyi with a carrying value of USD2.16 million and RenJianRenAi with a carrying value of USD58 thousand (after an impairment of USD230 thousand made during 2016 against its carrying value). These disposals resulted in a disposal gain of USD 626 thousand recognized in the other income, net (note 25).

(iv)

In May 2014, the Group obtained the right to appoint a director to Chengdu Diting and thus had one out of five seats on the board of directors of this investee. Given the existence of significant influence, the Group started to apply equity method in May 2014 although the Group's ownership interest in Chengdu Diting decreased from 19.9% to 16.58% because Chengdu Diting issued new shares to a third party for a total consideration of RMB 10 million (USD 1,627 thousand). In April of 2015, the new investor of Chengdu Diting injected capital of RMB 39.07 million (USD 6.39 million). As a result of the transaction, the Group 's ownership interest in Chengdu Diting was diluted from 16.58% to 13.27%. So the recognition of Chengdu Diting's ownership for the Group transferred from equity method to cost method. The Group recorded a dilution gain of RMB 4.38 million (USD 702 thousand) arising from the sale of shares by the investee to third parties at a price in excess of the per share carrying value of the shares owned by the Group in 2015.

In 2016, in addition to a dilution gain arising from deemed disposal of equity investment in Guangzhou Yuechuan of USD 69 thousand (note 11(iii)), the Group also recorded dilution gains from cost methods investments in Xiamen Diensi, Meizhi Interactive, Chengdu Diting and Kushiduo of USD 100 thousand, USD 84 thousand, USD 248 thousand and USD 188 thousand, respectively arising from the sale of shares by these investees at a price in excess of the per share carrying value of the shares owned by the Group.

(v)

In September of 2015, Tianjin Kunzhiyi suffered from financial difficulties and lost most of its core R&D staff. As a result, new games couldn't be promoted as committed in investment agreement with the Group. The Group recognized impairment of RMB 5 million (USD 802 thousand) for its interest in Tianjin Kunzhiyi as considered necessary.

In 2016, in addition to impairment of RenJian RenAi (note 11 (iii)), the Group also recognized impairment against its investments in Guangzhou Wucai, Suzhou Heidisi, and Shanghai Guozhi of USD 301 thousand, USD 597 thousand and USD 526 thousand, respectively after considering the latest operation status and financial and liquidity position.

Deferred revenue and income

12 Months Ended

Dec. 31, 2016

Deferred revenue and income

12.

Deferred revenue and income

	December 31,		December 31,
(In thousands)	2015		2016
Deferred revenue
Membership subscription revenues		24,502		22,115
Online game revenues (i)		1,120		1,490
Deferred income
Government grants (ii)		4,032		4,195
Reimbursement from the depository (iii)		842		814
Total		30,496		28,614
Less: non-current portion (iv)		(5,383)		(4,082)
Deferred revenue and income, current portion		25,113		24,532

(i)

The estimated lives of the user relationship extended, as result of change in accounting estimate of the lives of online game. Accordingly, the portion recognized as deferred revenue of online game increased.

(ii)

In March and June of 2016, the Group received government grant of USD 2.5 million. This government grant was recognized as deferred income and amortized in 5 years under the property, plant and equipment depreciation policy.

(iii)

In August 2016, the Company received from its depositary bank a reimbursement of USD 0.27 million, net of withholding tax of USD 0.6 million. This reimbursement was recognized as deferred income and amortized over the depositary service period of 5 years.

(iv)

As of December 31, 2016, the non-current portion included membership subscription revenue of USD 820 thousand (2015: USD719 th0usand), government grants of USD2,719 thousand (2015: USD4,032 thousand), and reimbursement from the depositary of USD543 thousand (2015: USD632 thousand).

The entire disclosure for deferred revenues at the end of the reporting period, and description and amounts of significant changes that occurred during the reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

Accrued liabilities and other payables [Abstract]

Accrued liabilities and other payables

12 Months Ended

Dec. 31, 2016

Accrued liabilities and other payables

13.

Accrued liabilities and other payables

	December 31,		December 31,
(In thousands)	2015		2016
Payroll and welfare		10,570		11,322
Agency commissions and rebates—online advertising		2,443		2,297
Payables for advertisement on exclusive online games		1,643		1,521
Receipts in advance from customers (note a)		—		5,538
Tax levies		1,605		1,864
Payables for purchase of equipment		4,999		3,235
Legal and litigation related expenses (Note 26)		2,601		2,904
Professional fees		908		1,007
Staff reimbursements		611		452
Rental expense		4		5
Payables for proceeds from selling exercised stock options		177		352
Payables for gaming distribution		158		147
Payables to Nesound		622		807
Others		1,038		1,680
Total		27,379		33,131

note a: Receipts in advance from customers represents prepayment from a customer in respect of CDN and advertisements services.

Redeemable convertible preferred shares

12 Months Ended

Dec. 31, 2016

Redeemable convertible preferred shares [Abstract]

Redeemable convertible preferred shares

15.

Redeemable convertible preferred shares

Series D convertible redeemable preferred shares

On January 31, 2012, the Company entered into an agreement to issue Series D preferred shares and warrants to a third-party investor for a total consideration of USD37,500 thousand. Pursuant to the agreement, the company issued 10,580,397 series D preferred shares at USD 3.544 per share; and warrants to purchase 2,218,935 Series D preferred shares at USD 3.38 per share at the option of the holders. In addition, the third-party investor also purchased a total of 5,036,367 existing shares directly from other then existing shareholders and they were entitled to the same rights as attached to the respective classes of existing shares.

The key terms of the Series D preferred shares were as follows:

Dividend rights

The holders of the Series D preferred shares were entitled to participate in any dividend pari passu with common shareholders of the Company on an as-converted basis.

Liquidation preferences

Amount shall be paid to Series D holders before any distribution or payment shall be made to the holders of Series A, Series A-1, Series B and C Preferred Shares. If asset for distribution is insufficient to pay off Series D holders, the assets shall be distributed among the holders of Series D in proportion to the full amounts to which they would otherwise be respectively entitled thereon on an as-converted basis.

Upon issuance of Series E preferred shares, the liquidation preference of Series D preferred shares was amended. Before any distribution or payment shall be made to the Series A, A-1, B and C shareholders (for the purpose of this clause, such holders did not include Skyline Global Company Holdings Limited (‘‘Skyline Holdings’’, or ‘‘Series D Investor’’), the Series D holder, who also held any Series A, A-1, B and any other Junior Securities) an amount shall be paid with respect to each share held by Skyline Holdings equal to original issue price.

Voting rights

The holders of the Series D preferred shares shall be entitled to such number of votes equal to the whole number of common shares into which such Series D preferred shares are convertible.

Conversion rights

Each share of the Series D preferred shares was convertible at the option of the holder, at any time after the issuance of such shares, and each share can be converted into one common share of the Company. The conversion was subject to adjustments for certain events, including but not limited to additional equity securities issuance, reorganization, mergers, share dividends, distribution, subdivisions, redemptions, combinations, or consolidation of common shares. The conversion price was also subject to adjustment in the event the Company issues additional common shares at a price per share that is less than such conversion price. In such case, the conversion price shall be reduced to adjust for dilution on a weighted average basis.

In addition, each share of the Series D preferred shares would automatically be converted into common shares of the Company (i) upon the closing of an initial public offering of the Company’s shares or (ii) upon written notice to convert given to the Company by the holders of a majority of Series D preferred shareholders.

Redemption Right

The Series D preferred shares were redeemable at any time after the 4^th anniversary of the initial closing of February 6, 2012 to request the Company to purchase all Series D preferred shares and shares issuable upon the conversion or exercise of the Series D warrants if an initial public offering is not consummated. This redemption right expires after the 5^th anniversary of the initial closing of the transaction. The redemption price shall be equal to the aggregate amount of price paid at USD3.544, plus all declared but unpaid dividends up to the date of redemption plus interest of 8% per annum compounded annually from the closing of the Series D preferred shares investment(“Initial Closing”) up to and including the date of redemption.

The Company had determined that the Series D preferred shares should be classified as mezzanine equity. The Series D warrant is initially measured at its fair value and the initial carrying value for Series D preference shares is allocated on a residual basis as it was liability classified. The initial carrying value for Series D preference shares was USD 32,481 thousand, and the related capitalized expense was USD2,012 thousand. There were no beneficial conversion features for the Series D preferred shares.

The carrying value of the preferred shares was accreted from its carrying value on the date of issuance to the redemption value using effective interest method from date of issuance to the earliest redemption date. The accretion was recorded against retained earnings, or in the absence of retained earnings, by charging against additional paid-in capital. Once additional paid-in capital had been exhausted, additional charges were recorded by increasing the accumulated deficit. The Company had determined that conversion and redemption features embedded in the Series D convertible redeemable preferred shares were not required to be bifurcated and accounted for as a derivative.

Series D Warrants

The holder of Series D warrants had the right to exercise the warrants at the earlier of (i) 24 months from date of Initial Closing or (ii) automatically exercised immediately prior to the closing of the following transactions: (a) mergers or consolidation of the Company, b) initial public offering, c) transaction in which in excess of 50% of the Company’s equity is transferred to any person, d) sale, transfer, lease, assignment conveyance, exchange, mortgage, or other disposition of all or substantially all of the assets of the Company. The warrants were not entitled to dividend rights nor to vote until the warrants were exercised and shares became issuable. Series D warrants was classified as a liability and initially measured at their fair value at USD 3,007 thousand. As of December 31, 2013, the fair value of Series D warrants was USD 2,186 thousand. For the year ended on December 31, 2012 and 2013, the fair value (loss) / gain recorded were USD 710 thousand and USD 1,531 thousand, respectively.

Exchange of Series D warrants and the issuance of Series E warrants

The warrants to purchase 1,952,663 and 266,272 Series D preferred shares at USD3.38 per share expired on February 6, 2014 and March 1, 2014, respectively. On the date of the expiration, the warrant was measured at a fair value of USD2,414 thousand. It was agreed that upon issuance of the Series E preferred shares on March 5, 2014, the Company would issue to the Series D investor warrants to purchase 3,406,824 Series E preferred shares with an exercise price of USD2.82. These warrants are exercisable at the option of the holder, at any time, no later than the earlier of (1) the pricing date of the initial public offering of the Company or (2) March 1, 2015. As the warrants were exercised into mezzanine equity, the warrants are classified as a liability and were initially measured at a fair value of USD2,819 thousand.

The exchange of the Series D warrants and the issuance of the Series E warrants were considered to be a related transaction and are accounted for as a single transaction because the holder was willing to allow the Series D warrants to expire in contemplation that they would be issued Series E warrants. A loss of USD405 thousand, which was the difference in value of the Series D warrants on the expiration date and the value of the Series E warrants on the issuance date was charged to the income statement in quarter one of 2014.

The fair value of the Series D warrants and the Series E warrants was estimated by the Company with the assistance of an independent valuation firm based on the Company’s estimates and assumptions. The valuation report provided the Group with guidelines in determining the fair value, but the determination was made by the Group. The Group applied the Black-Scholes Option Pricing Model to calculate the fair value of the Series D warrant on the valuation date.

The major assumptions used in calculating the fair value of the Series D warrants include:

	February 6,
	2014
Spot price⁽¹⁾		4.47
Risk-free interest rate⁽²⁾		0	%*
Volatility rate⁽³⁾		0	%*
Dividend yield⁽⁴⁾		—

Given that the maturity date of Series D warrant was February 6, 2014, the volatility rate and risk-free interest rate did not affect the valuation of the warrant on February 6, 2014.

The major assumptions used in calculating the fair value of the Series E warrants include:

	March 5,
	2014
Spot price⁽¹⁾		3.31 - 4.65
Risk-free interest rate⁽²⁾		0.04% - 0.12	%
Volatility rate⁽³⁾		38.39% - 38.81	%
Dividend yield⁽⁴⁾		—

(1)

Spot price – based on the fair value of 100 percent equity interest of the Company which was allocated to preferred shares and common shares of the Company as at the valuation date under different scenarios. For the valuation on March 5, 2014 and March 31, 2014, the probability of the occurrence of an IPO is assumed to be 80%, the probability of the occurrence of a liquidation event is assumed to be 10% and the probability of the occurrence of a redemption event is assumed to be 10%

(2)

Risk-free interest rate – based on the US Treasury Bond & Notes BFV curve from Bloomberg as at the valuation date.

(3)

Volatility – based on the average historical volatility of the comparable companies from Bloomberg as at the valuation date.

(4)

The Company has no history or expectation of paying dividends on its common shares.

Triggering of the anti-dilution clause

Upon issuance of Series E preferred shares in March and April 2014, the Company adjusted the Series D conversion price from USD3.5 to USD2.86 per share for 6,771,454 Series D preferred shares held by the Series D Investor. The Company concluded that the downward conversion price adjustment is in accordance with the anti-dilution clause in the original Series D financing agreement. As a result of this anti-dilution, the Company would issue a total of 8,391,850 common shares on a fully-converted basis of the original 6,771,454 Series D preferred shares when the conversion right is exercised by the holder. The downward adjustment of the conversion price did not contain a contingent beneficial conversion feature.

For the remaining 3,808,943 Series D preferred shares held by the Series D Investor, the Series D investor agreed to waive the anti-dilution clause as the Series D Investor has planned to sell these shares to the Company upon the issuance of Series E preferred shares in March 2014. The waiver of this anti-dilution clause was accounted for as a modification of the terms of the Series D preferred shares. However, it was determined that the incremental value contributed by the Series D Investor was deemed to be a transfer of value between the preferred shareholders because 1) the change in value of the common shares before and after the modification was deemed to be negligible and 2) the modification of the Series D preferred shares were also made concurrent with the sale of the Series E preferred shares. The Company concluded that this was evidence to suggest that most of the value was transferred from the Series D preferred shareholder to the other existing preferred shareholders. Therefore, no accounting charge was recorded.

Upon the completion of the IPO on 24 June 2014, the Company adjusted the Series D conversion price from USD2.86 to USD2.27 per share relating to 6,771,454 Series D preferred shares held by the Series D Investor. The Company concluded that the downward conversion price adjustment is in accordance with the anti-dilution clause in the latest shareholders agreement. As a result of this anti-dilution, the Company would issue a total of 10,581,726 common shares on a fully-converted basis of the original 6,771,454 Series D preferred shares when the conversion right is exercised by the holder. At the time of this anti-dilution, the Series D preferred shares anti-diluted contained a beneficial conversion feature of USD4,008 thousand as a deemed dividend to Series D Investor and charged against retained earnings, and in the absence of retained earnings, a charge to additional paid-in capital.

Modification of redemption rights

Upon issuance of the Series E preferred shares in March 2014, the Company amended the redemption rights of 6,771,454 Series D preferred shares. The Series D investor shall have the right to request the Company to purchase its shares after February 28, 2017 but no later than February 28, 2018. Prior to the modification, the holder had the right to request the Company to purchase its shares after February 6, 2016 but no later than February 6, 2017. The amendment of the redemption date was accounted for as modification of the terms of Series D preferred shares. The incremental value received by the Series D preferred shareholder amounted to USD279 thousand and was deemed to be a transfer of value between the preferred shareholder and common shareholders and the amount was charged to retained earnings.

In determining the accounting for the modification of the Series D preferred shares, the Company estimated the valuation of the Series D preferred shares with the assistance of an independent valuation firm based on the Company’s estimates and assumptions. Option-pricing method was used to allocate enterprise value to preferred and ordinary shares, taking into account the guidance prescribed by the AICPA Audit and Accounting Practice Aid, ‘‘Valuation of Privately-Held Company Equity Securities Issued as Compensation’’. The method treats common stock and preferred stock as call options on the enterprise’s value, with exercise prices determined based on the liquidation preference of the preferred stock. The option-pricing method involves making estimates of the anticipated timing of a potential liquidity event, such as a sale of the Company or an initial public offering, and estimates of the volatility of the Company’s equity securities.

The anticipated timing was based on the plans of management. Estimating the volatility of the share price of a privately held company was complex because there is no readily available market for the shares. The Company estimated the volatility of its shares to range from 38.39% to 43.40% based on the historical volatility of comparable publicly traded shares of companies engaged in similar lines of business.

Modification of liquidation rights

Upon issuance of the Series E preferred shares, the Company amended the liquidation rights of Skyline Holdings’ common shares, Series A preferred shares, Series A-1 preferred shares, and Series B preferred shares (collectively, the ‘‘Series D Investor Shares’’). As a result of this amendment, the Series D Investor Shares had priority to receive proceeds from the Company upon liquidation over the common shares, Series A preferred shares, Series A-1 preferred shares, Series B preferred shares and Series C preferred shares held by other investors. This right given to the Skyline Holdings was non-transferable to a third party. The amendment of the liquidation rights was accounted for as modification of the terms of Series D Investor Shares. However, the incremental value received by Skyline Holdings is deemed to be negligible. No accounting charge was recorded by the Company. Similar to the modification of the Series D preferred shares as stated above, the fair value of the Series D preferred shares was estimated by the Company with the assistance of an independent valuation firm based on the Company’s estimates and assumptions. The Option-pricing method as described above, was also used to account for this modification. The Company estimated the volatility of its shares to range from 38.39% to 43.40% based on the historical volatility of comparable publicly traded shares of companies engaged in similar lines of business.

The Group had determined that there was no beneficial conversion feature attributable to the Series D preferred shares because the initial and adjusted effective conversion prices of these preferred shares were higher than the fair value of the Company’s common shares determined by the Group with the assistance from an independent valuation firm.

Initial public offering

Upon the completion of the IPO on 24 June 2014, the Series D Investor did not exercise Series E warrants, and the fair value of Series E warrants was nil. The fair value gain of USD2,922 thousand was recorded for the year ended December 31, 2014 as other income. As a result, 10,581,726 common shares were issued, and the balance of Series D preferred shares was transferred to common shares and additional paid-in capital on that date.

	Year ended		Year ended
	December 31,2013		December 31,2014
Beginning balance		35,990		40,290
Deemed dividend to Series D shareholder from its modification		—		279
Accretion of Series D to convertible redeemable preferred shares redemption value		4,300		1,870
Repurchase of preferred shares		—		(15,003)
Deemed dividend to preferred shareholders upon IPO		—		4,008
Converted to common shares upon IPO		—		(31,444)
Ending balance		40,290		—

Series E convertible redeemable preferred shares

On March 5, 2014, the Company entered into an agreement to issue Series E preferred shares (the ‘‘Series E Tranche 1 Preferred Shares’’) and warrants to a third-party investor (‘‘Series E Tranche 1 Investor’’) for a total consideration of USD 200 million. Pursuant to the agreement, the Company issued 70,975,491 Series E Tranche 1 Preferred Shares at USD 2.82 per share; and warrants to purchase 17,743,873 Series E preferred shares at USD 2.82 per share at the option of the holders. In addition, within 3 months after the closing, the Series E Tranche 1 Investor shall have the right (‘‘Subscription Rights’’) to purchase, or designate any other person/party to purchase from the Company an additional 35,487,746 Series E preferred shares, at a price equal to USD 2.82 per share.

The key terms of the Series E preferred shares were as follows:

Dividend rights

The holders of the Series E preferred shares were entitled to participate in any dividend pari passu with common shareholders of the Company on an as-converted basis.

Liquidation preferences

Before any distribution or payment shall be made to the holders of Series A, Series A-1, Series B, Series C and D preferred shares, an amount shall be paid to Series E holders with respect to each Series E preferred share held by the Series E holder equal to 100% of the applicable original issue price.

Voting rights

The holders of the Series E preferred shares shall be entitled to such number of votes equal to the whole number of common shares into which such Series E preferred shares are convertible.

Conversion rights

Each of the Series E preferred shares was convertible at the option of the holder, at any time after the issuance of such shares, and each share could be converted into one common share of the Company. The conversion was subject to adjustments for certain events, including but not limited to additional equity securities issuance, reorganization, mergers, share dividends, distribution, subdivisions, redemptions, combinations, or consolidation of common shares. The conversion price was also subject to adjustment in the event the Company issues additional common shares at a price per share that was less than such conversion price. In such case, the conversion price shall be reduced to adjust for dilution on a weighted average basis.

In addition, each of the Series E preferred shares would automatically be converted into common shares of the Company (i) upon the closing of an initial public offering of the Company’s shares or (ii) upon written notice to convert given to the Company by the holders of a majority of Series E preferred shareholders.

Redemption right

The Series E preferred shares were redeemable at the option of the investor any time after March 1, 2018 but not later than March 1, 2019.

The redemption price shall be equal to the aggregate amount of price paid per such share pursuant to the share purchase agreement (i.e. USD 2.82), plus interest on the original issue price applicable to each Series E convertible redeemable preferred share at a rate of 15% per annum compounded annually from the issuance date up to and including the date of redemption, plus all declared but unpaid dividends and distributions on any such Shares; If the Company did not have sufficient funds to redeem all of the redeemable shares, the Company shall redeem a pro rata portion of each holder’s redeemable shares out of funds legally available; and redeem the remaining shares as soon as practically after the Company had funds legally available therefor.

The Company had determined that the Series E preferred shares should be classified as mezzanine equity in the unaudited condensed consolidated balance sheets because the preferred shares are only contingently redeemable by the holder four years after the issuance date. The carrying value of the preferred shares is accreted from its carrying value on the date of issuance to the redemption value using the effective interest method from date of issuance to the earliest redemption date. The accretion was recorded against retained earnings, or in the absence of retained earnings, by charging against additional paid-in capital. Once additional paid-in capital has been exhausted, additional charges should be recorded by increasing the accumulated deficit.

The Company assessed beneficial conversion feature attributable to the Series E Tranche 1 Preferred Shares and determined that there was a beneficial conversion feature with an amount of USD52,377 thousand, which was bifurcated from the carrying value of Series E Tranche 1 Preferred Shares as a contribution to additional paid-in capital upon issuance of Series E Tranche 1 Preferred Shares. The discount of USD52,377 thousand resulting from the recognition of the beneficial conversion feature were amortized from the date of the issuance to the first redemption date of the Series E Tranche 1 Preferred Shares as a deemed dividend to preferred shareholders and charged against retained earnings, and in the absence of retained earnings, a charge to additional paid-in capital. The beneficial conversion feature is calculated based on the difference between an adjusted conversion price of USD2.31 and the Company’s common share fair value of USD3.05 multiplied by the number of shares into which the preferred shares are convertible into. The conversion price was adjusted from USD2.82 to USD2.31 principally because liability classified instruments, such as the warrants and the subscription rights (see below for further information) were issued with the Series E Tranche 1 Preferred Shares. Since the warrants and the subscription rights are classified as liability, the sales proceeds are first allocated to the warrants and the subscription rights’ full fair value (not relative fair value) and the residual amount of the sales process is allocated to the Series E Tranche 1 Preferred Shares to calculate the beneficial conversion feature.

	December 31,
(In thousands)	2014
Beginning balance		—
Addition		275,314
Exercise of Series E subsequent sale rights		28,568
BCF upon Series E		(53,486)
Amortisation of BCF of Series E		4,139
Accretion of Series E to convertible redeemable preferred shares redemption value		12,754
Acceleration of amortization of BCF of Series E upon IPO		49,346
Deemed dividend to preferred shareholders upon IPO		27,396
Converted to common shares upon IPO		(344,031)
Ending balance		—

Exchange of Series E Tranche 1 Investor options for transfer restrictions

As part of the issuance of the Series E Tranche 1 Preferred Shares, the Series E Tranche 1 Investor and the Company’s founders (who are also employees) and two employees (collectively the ‘‘Grantees’’) of the Company agreed that (i) Series E Tranche 1 Investor will grant to the Grantees the right to purchase certain number of restricted shares of the Series E Tranche 1 Investor’s own shares with a total subscription consideration of not more than USD20 million at a subscription price subscription price per share that reflects the valuation of the Series E Tranche 1 Investor being USD10 billion (the ‘‘Series E Tranche 1 Investor Options’’); and (ii) the Grantees agreed to impose a transfer restriction (the ‘‘Transfer Restrictions’’) on 39,934,162 common shares, 3,394,564 unvested restricted shares, 180,000 unvested options and 180,000 vested options (the ‘‘Shares’’) owned by the Grantees. The Transfer Restrictions prohibit the Grantees from transferring their shares to another person/party until April 24, 2018 or April 24, 2019 as appropriate without the prior written consent of the holders of at least 75% of the Series E Tranche 1 Preferred Shares holders The Series E Tranche 1 Investor Options and the Transfer Restrictions are not tied to the Grantees’ future employment with the Company.

The value of the Transfer Restrictions was determined to be significantly greater than the value of Series E Tranche 1 Investor Options. In determining the value of the Transfer Restrictions, the Company was assisted by an independent valuation firm based on data provided by the Company. The valuation of the Transfer Restrictions is estimated to be USD43.3 million (refer to the valuation methodology below). For the valuation of the Series E Tranche 1 Investor Options, the Company was only able to obtain limited financial information from the Series E Tranche 1 Investor, a private company, to perform a valuation analysis. This information includes high level 2013 revenue data and information of a third party investment transaction that valued the Series E Tranche 1 Investor at USD10 billion in August of 2013. Given the lack of financial information, the Company is unable to determine a more precise estimate of the fair value of the Series E Tranche 1 Investor Options on the exchange date. If the fair value of the Series E Tranche 1 Investor Options were worth USD43.3 million, the estimated value of the Transfer Restrictions, the Series E Tranche 1 Investor itself would need to be estimated at a valuation in excess of USD30 billion on March 5, 2014. The Company does not expect the valuation of the Series E Tranche 1 Investor to increase by 200% from USD 10 billion in August 2013 to USD 30 billion in March 2014. Hence, no incremental benefit was given to the Grantees and no compensation expense was recognized.

To determine the fair value of the Transfer Restrictions, the Company valued the common shares with the Transfer Restrictions and compared this value to the value of the common shares without the restriction. The difference was determined to be the value of the Transfer Restrictions. A put option pricing model was used to determine the discount to be applied to the common shares to arrive at the value of common shares with the Transfer Restrictions. Pursuant to that model, the Company used the cost of a put option, which can be used to hedge the price change before a share subject to transfer restriction can be sold, as the basis to determine the discount for transfer restrictions. A put option was used because it incorporates certain company-specific factors, including timing of the expected initial public offering or duration of the Transfer Restriction and the volatility of the share price companies engaged in the same industry.

Series E Warrants

The Series E warrants (‘‘Series E warrants’’) granted to the Series E Tranche 1 Investor is exercisable at the option of the Series E Tranche 1 Investor, at any time, on or after January 1, 2015 and no later than March 1, 2015. The warrants are not exercisable if the Company has completed the initial public offering in the United States by December 31, 2014. The exercise price shall be adjusted from time to time as provided below: proportionate adjustment for issuance of additional common shares, share split and combination, dividend and distributions, reclassification, reorganization, merger, and consolidations.

The warrants are not entitled to dividend rights nor to vote until the warrants are exercised and shares become issuable. The Series E warrants are initially measured at its fair value and the initial carrying value for Series E Tranche 1 Preferred Shares is allocated on a residual basis as the warrant is liability classified. The Series E warrants are initially measured at their fair value of USD 6,477 thousand.

The fair value of the Series E warrants were estimated by the Company with the assistance from an independent valuation firm based on data provided by the Company. The valuation report provided by the Company with guidelines in determining the fair value, but the determination was made by the Company. The Company applied the Black-Scholes Option Pricing Model to calculate the fair value of the Series E warrants on the valuation date.

The major assumptions used in calculating the fair value of the Series E warrants include:

	March 5,
	2014
Spot price⁽¹⁾		4.50 - 4.65
Risk-free interest rate⁽²⁾		0.12	%
Volatility rate⁽³⁾		38.81	%
Dividend yield⁽⁴⁾		—

(1)

Spot price – based on the fair value of 100 percent equity interest of the Company which is allocated to preferred shares and common shares of the Company as at the valuation date under different scenarios. The probability of the occurrence of an IPO is assumed to be 80%, the probability of the occurrence of a liquidation event is assumed to be 10% and the probability of the occurrence of a redemption event is assumed to be 10%.

(2)

Risk-free interest rate – based on the US Treasury Bond & Notes BFV curve from Bloomberg as at the valuation date.

(3)

Volatility – based on the average historical volatility of the comparable companies from Bloomberg as at the valuation date.

(4)

The Company has no history or expectation of paying dividends on its common shares.

Subscription Rights

Within 3 months after March 5, 2014, the Series E Tranche 1 Investor shall have Subscription Rights to purchase, or designate any other person/party to purchase from the Company an additional number of 35,487,746 Series E preferred shares, at a price equal to the purchase price per share (USD 2.82) of the Series E issuance. The exercise price shall be adjusted from time to time as provided below: proportionate adjustment for issuance of additional common shares, share split and combination, dividend and distributions, reclassification, reorganization, merger, and consolidations. The Subscription Rights are not entitled to dividend rights nor to vote until the Subscription Rights have been exercised and shares are issuable.

On April 24, 2014, two of the three Series E Tranche 2 Investors exercised the Subscription Rights assigned to them by the Series E Tranche 1 Investor to purchase USD100 million while the third Series E Tranche 2 investor purchased the remaining USD10 million. Upon the exercise of the Subscription Rights, the fair value of the warrant liability of USD 29,223 thousand was derecognized and credited to carrying amount of the Series E Tranche 2 Preferred Shares.

The fair value of the Subscription Rights was estimated by the Company with the assistance from an independent valuation firm based on data provided by the Company. The valuation report provided by the Company with guidelines in determining the fair value, but the determination was made by the Company. The Company applied the Black-Scholes Option Pricing Model to calculate the fair value of the Subscription Rights on the valuation date. The Subscription Rights are initially measured at their fair value of USD 28,208 thousand. As of April 24, 2014, the fair value of Subscription Rights was USD 29,223 thousand.

The major assumptions used in calculating the fair value of the Subscription Rights include:

	March 5,			April 24,
	2014			2014
Spot price⁽¹⁾		3.31 - 4.65			3.39 - 4.64
Risk-free interest rate⁽²⁾		0.04	%		0.02	%
Volatility rate⁽³⁾		38.12	%		42.74	%
Dividend yield⁽⁴⁾		—			—

(1)

(2)

Risk-free interest rate – based on the US Treasury Bond & Notes BFV curve from Bloomberg as at the valuation date.

(3)

Volatility – based on the average historical volatility of the comparable companies from Bloomberg as at the valuation date.

(4)

The Company has no history or expectation of paying dividends on its common shares.

Issuance of Series E Tranche 2 Preferred Shares

On April 24, 2014, the Company issued Series E convertible redeemable preferred shares (the ‘‘Series E Tranche 2 Preferred Shares’’) to three investors (the ‘‘Series E Tranche 2 Investors’’) to subscribe 39,037,382 Series E Tranche 2 Preferred Shares for a total consideration of USD110 million.

The Company assessed the beneficial conversion feature attributable to the Series E Tranche 2 Preferred Shares and determined that there was a beneficial conversion feature with an amount of USD1,109 thousand for the Series E Tranche 2 Preferred Shares of USD10 million issued to one investor. For the remaining Series E Tranche 2 Preferred Shares of USD100 million issued to another two investors, there was no beneficial conversion feature attributable to them.

Initial public offering

Upon the completion of the IPO on 24 June 2014, the Company adjusted the Series E conversion price from USD2.82 to USD2.4 per share relating to 110,014,440 Series E preferred shares held by the Series E investors. The Company concluded that the downward conversion price adjustment is in accordance with the anti-dilution clause in the latest shareholders agreement. As a result of this anti-dilution, the Company issued a total of 129,166,667 common shares on a fully-converted basis when the conversion right is exercised by the Series E shareholders. The triggering of the anti-dilution clause resulted in a beneficial conversion feature amounted to USD 27,396 thousand which was charged to retained earnings in 2014 as a deemed dividend to Series E shareholders. And the unamortized beneficial conversion features of Series E preferred shares of USD49,346 thousand were recognized upon the completion of the IPO as a deemed dividend to Series E investors and charged against retained earnings, and in the absence of retained earnings, a charge to additional paid-in capital.

Upon the completion of the IPO on 24 June 2014, the Series E warrants are not exercisable in future. As a result, the fair value of Series E warrants liability of USD6,381 thousand was derecognized and the related fair value gain was recognized as other income.

Convertible preferred shares

12 Months Ended

Dec. 31, 2016

Convertible preferred shares [Abstract]

Convertible preferred shares

16.

Convertible preferred shares

The key terms of the Series A, Series A-1, Series B and Series C preferred shares are as follows:

Dividend rights

The holders of the Series A, Series A-1, Series B and Series C preferred shares are entitled to participate in any dividend pari passu with common shareholders of the Company on an as-converted basis.

Liquidation preferences

In the event of a liquidation, dissolution or winding up of the Company, available assets and funds of the Company are distributed to the holders of the preferred shares in order of 1) Series C and Series B which are grouped as one class for the purpose of liquidation preference, 2) Series A-1 and then 3) Series A, at their respective original issuance price per share plus any declared but unpaid dividends adjusted for share splits, share dividends, recapitalizations, and other adjustments. In the event that available assets and funds are insufficient to permit payment to the holders of the less senior class of preferred shares, the assets and funds will be distributed ratably to that class of preferred shareholders based on their proportional share ownership. After the distribution to the holders of Series C and Series B, Series A-1, Series A preferred shares and common shares are made, any remaining legally available assets and funds shall be distributed to the holders of common shares and Series C and Series B, Series A-1 and Series A preferred shares pro rata on an as-converted basis.

In addition, the following events are deemed liquidation events in which case any proceeds derived from such deemed liquidation events will be distributed in the order discussed above. If no proceeds are derived from such deemed liquidation events, the Series B preferred shareholders shall have the right to require the Company to repurchase all or any of the outstanding Series B preferred shares at the original issue price.

Any consolidation or merger of the Company or other corporate reorganization, in which the shareholders of Company own less than a majority of the voting power of the Company or surviving company, after such consolidation, merger or reorganization

A sale of other disposition of all or substantially all of the assets of the Company or the Group

A transfer or an exclusive licensing of all or substantially all of the intellectual property of the Company

However, all liquidation events or deemed liquidation event have to be approved by a special resolution passed by a duly convened general meeting of the Company, which require presence of a representative from the common shareholders, a representative from Series A-1 preferred shareholders and a representative from Series B preferred shareholders. Accordingly, the Company determined that the deemed liquidation events are within the control of the Company and the Series B preferred shareholders do not have control of the Company. Therefore, the deemed liquidation events do not preclude the Series B preferred shares from being classified within permanent equity.

Voting rights

The holders of the Series A, Series A-1, Series B and Series C preferred shares shall be entitled to such number of votes equal to the whole number of common shares into which such Series A, Series A-1, Series B and Series C preferred shares are convertible.

Conversion rights

Each share of the Series A, Series A-1, Series B and Series C preferred shares is convertible at the option of the holder, at any time after the issuance of such shares, and each share can be converted into one common share of the Company. In addition, each share of the Series A, Series A-1, Series B and Series C preferred shares would automatically be converted into common shares of the Company upon (i) an underwritten public offering of the company’s shares on major stock exchanges, including Nasdaq Global Market that results in proceeds to the Company of at least USD 50 million (“QIPO”) or (ii) upon written notice to convert given to the Company by the holders of a majority of such class or series of preferred shares in issue, in each case voting as a separate class on an as converted basis, as applicable.

At the time of issuance, the Series A preferred shares issued to one of the shareholders in 2005 contained a beneficial conversion feature of USD 54 thousand and the amount was charged to retained earnings in 2005 as a deemed dividend.

At the time of anti-dilution, the Series C preferred shares anti-diluted in 2012 contained a beneficial conversion feature of USD 286 thousand and the amount was charged to retained earnings in 2012 as a deemed dividend. There were no beneficial conversion features for the other issuance.

In April, 2011, the Company removed the USD 50 million threshold from the definition of QIPO. The removal of the threshold is not expected to have a significant impact to the financial statements of the Company.

None of the preferred shares are redeemable at the holders’ option.

Modification in 2012

Upon issuance of Series D preferred shares in January 2012 as discussed in note 15, the Company adjusted the Series C conversion price from USD5.24 to USD4.14 per share; and obtained an exclusive option to purchase at any time within 12 months after the date of the conversion for all, but not less than all, of Series C preferred shares at the purchase price of USD4.607 per common share. The Series C conversion price could be adjusted for any share dividends, sub-division and consolidation, and unpaid dividend. As a result of this modification, the Company would issue a total of 7,248,293 common shares on a fully-converted basis of the original 5,728,264 Series C preferred shares when the conversion right is exercised by the holder. Other terms of the Series C preferred shares including the original liquidation rights remained unchanged.

The Company concluded that the downward conversion price adjustment from USD 5.24 to USD 5.13 is in accordance with the anti-dilution clause in the original Series C financing agreement. The incremental downward price adjustment from USD 5.13 to USD 4.14 and the right to an exclusive purchase option are accounted for as modifications of the terms of Series C preferred shares. The incremental value contributed by the Series C preferred shareholder amounted to USD 2,905 thousand and was deemed to be a wealth transfer between the preferred shareholder and common shareholders and the amount was charged to additional paid-in capital.

In determining the accounting for the modification of the Series C preferred shares, the Group also relied on, in part, a valuation report retrospectively prepared by an independent valuer based on data provided by the Group. The valuation report provided the Group with guidelines in determining the fair value, but the determination was made by the Group. Option-pricing method was used to allocate enterprise value to preferred and ordinary shares, taking into account the guidance prescribed by the AICPA Audit and Accounting Practice Aid, “Valuation of Privately-Held Company Equity Securities Issued as Compensation”. The method treats common stock and preferred stock as call options on the enterprise’s value, with exercise prices determined based on the liquidation preference of the preferred stock.

The option-pricing method involves making estimates of the anticipated timing of a potential liquidity event, such as a sale of the Company or an initial public offering, and estimates of the volatility of the Group’s equity securities. The anticipated timing is based on the plans of management. Estimating the volatility of the share price of a privately held company is complex because there is no readily available market for the shares. The Group estimated the volatility of its shares to range from 55.36% to 59.91% based on the historical volatility of comparable publicly traded shares of companies engaged in similar lines of business.

Modification in 2014

In January of 2014, the Company modified the anti-dilution terms relating to 5,613,699 Series C preferred shares held by one investor (‘‘Series C Investor 1’’). The modification effectively amended the anti-dilution triggering price from USD4.14 to USD2.81 per share. The incremental downward trigger price adjustment from USD 4.14 to USD 2.81 is accounted for as modifications of the terms of Series C preferred shares. The incremental value contributed by the Series C preferred shareholder was deemed to be a transfer of value between the preferred shareholders because the change in the value of the common shares before and after the modification was deemed to be negligible. The Company concluded that this was evidence to suggest that most of the value was transferred from this Series C preferred shareholder to the other existing preferred shareholders. No accounting charge was recorded by the Company.

Triggering of the anti-dilution clause

Upon issuance of Series E preferred shares in March and April 2014, the Company adjusted the Series C conversion price from USD4.14 to USD3.64 and from USD3.64 to USD3.63 per share relating to 114,565 Series C preferred shares held by one investor (‘‘Series C Investor 2’’), respectively. The Company concluded that the downward conversion price adjustment is in accordance with the anti-dilution clause in the original Series C financing agreement. As a result of this anti-dilution, the Company would issue a total of 165,236 common shares on a fully-converted basis of the original 114,565 Series C preferred shares when the conversion right is exercised by the holder. At the time of this anti-dilution, the Series C preferred shares anti-diluted in 2014 contained a beneficial conversion feature of USD 58 thousand and the amount was charged to retained earnings in 2014 as a deemed dividend. The issuance of the Series E Tranche 1 Preferred Shares did not triggered the anti-dilution term of Series C Investor 1 as their shares were modified as described above.

Upon the completion of the IPO on 24 June 2014, the Company adjusted the Series C conversion price from USD4.14 to USD3.89 and from USD3.63 to USD3.45 per share relating to 5,613,699 Series C preferred shares held by Series C Investor 1 and 114,565 Series C preferred shares held by Series C Investor 2, respectively. The Company concluded that the downward conversion price adjustment is in accordance with the anti-dilution clause in the latest shareholders agreement. As a result of this anti-dilution, the Company issued a total of 7,724,419 common shares on a fully-converted basis when the conversion right is exercised by the Series C shareholders. The triggering of the anti-dilution clause resulted in a beneficial conversion feature amounted to USD 1,403 thousand as a deemed dividend to Series C shareholders and charged against retained earnings, and in the absence of retained earnings, a charge to additional paid-in capital.

As a result, 96,024,567 common shares were issued, and the balance of Series A, Series A-1, Series B and Series C preferred shares was transferred to common shares and additional paid-in capital on the same date.

Common shares

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Common shares

17.

Common shares

The Company’s Memorandum and Articles of Association authorizes the Company to issue 1,000,000,000 shares of USD0.00025 par value per common share as of December 31, 2016. Each common share is entitled to one vote. The holders of common shares are also entitled to receive dividends whenever funds are legally available and when declared by the Board of Directors, which is subject to the approval by the holders of the common shares representing a majority of the aggregate voting power of all outstanding shares. As of December 31, 2015 and 2016, there were 339,319,115 and 330,545,000 common shares outstanding, respectively.

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

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Repurchase of shares

12 Months Ended

Dec. 31, 2016

Repurchase of shares [Abstract]

Repurchase of shares

18.

Repurchase of shares

The following table is a summary of the shares repurchased by the Company during 2016 under the Repurchase Program. No shares were repurchased during 2016 except during the months indicated and all shares were purchased through privately negotiated transactions as a mean of exercising share options from Xunlei’s employees and publicly purchasing from the open market pursuant to the Repurchase Program:

	Total Number of
	ADSs Purchased as
	Part of the Publicly		Average Price
Periods	Announced Plan		Paid Per ADS
March 15 – March 30		408,985		6.22
April 1– April 14		457,900		6.61
May 2 – May 31		449,696		6.28
June 9 – June 30		111,459		5.24
July 1 – July 29		555,357		5.33
August 1 – August 30		229,695		5.83
September 6 – September 30		15,467		5.33
October 13 - October 27		31,400		5.11
November 18 – November 30		21,229		4.61
December 2 – December 30		173,312		4.02
Total		2,454,500

Note a

In January 2016, our board of directors authorized a share repurchase program, whereby the Company may repurchase up to US$20 million of common shares or ADSs from January 27, 2016 to December 31, 2016 through the same means as the Repurchase Program. The share repurchases may be made in accordance with applicable laws and regulations through open market transactions, privately negotiated transactions or other legally permissible means as determined by management, including through Rule 10b5-1 share repurchase plans. The Company publicly announced the Repurchase Program on January 26, 2016.

Note b

During the year ended December 31, 2016, 2,454,500 ADSs purchased at an aggregate consideration of USD 14,319 thousand under the Repurchase Program. Due to the expiration of the Repurchase Program, the remaining unused amount of approximately USD 5.7 million was no longer available for repurchase after December 31, 2016.

Non-controlling interest

12 Months Ended

Dec. 31, 2016

Non-controlling interest [Abstract]

Non-controlling interest

19.

Non-controlling interest

Non-controlling interest includes the interest owned by a shareholder of the Company in a subsidiary of the consolidated VIE.

In February 2010, Shenzhen Xunlei set up a new subsidiary named Xunlei Games Development (Shenzhen) Co., Ltd. (“Xunlei Games”) and holds 70% of its equity interest. A shareholder of the Company contributed RMB 3,000 thousand (equivalent to USD439 thousand) and holds 30% equity interest in Xunlei Games, which was accounted for as a non-controlling interest of the Group.

Share-based compensation

12 Months Ended

Dec. 31, 2016

Share-based compensation [Abstract]

Share-based compensation

20.

Share-based compensation

2010 share incentive plan

During the years presented, the Company granted share options to employees, officers and directors of the Group.

These options were granted with exercise prices denominated in the USD, which is the functional currency of the Company. The maximum term of any issued stock option is seven or ten years from the grant date. Stock options granted to employees and officers vest over a four-year schedule as stated below:

(1)	One-fourth of the options shall be vested upon the first anniversary of the grant date;

(2)	The remaining three quarters of the options shall be vested on monthly basis over the next thirty-six months. (¹/₄₈ of options shall be vested per month subsequently)

Stock options granted to directors were subject to a vesting schedule of approximately 32 months.

All share-based payments to employees are measured based on their grant-date fair values. Compensation expense is recognized on a straight-line basis over the requisite service period.

In December 2010, the Group adopted a share incentive plan, which is referred to as the 2010 Share Option Plan (“the 2010 Plan”). The purpose of the plan is to attract and retain the best available personnel by linking the personal interests of the members of the board, employees, and consultants to the success of the Group’s business and by providing such individuals with an incentive for outstanding performance to generate superior returns for our shareholders. Under the 2010 Plan, the maximum number of shares in respect of which options, restricted shares, or restricted share units may be granted is 26,822,828 shares (excluding the share options previously granted to the directors who are the founders of the Company). The amount of shares available for such grants as of December 31, 2016 is 4,677,465.

On June 11, 2014, our board of directors decided to extend the contractual life for certain vested share options to June 11, 2015, because the maturity date of these options was from June to December in 2014, whereas, the lock-up period for the shares was 6 months from the IPO closing date, i.e. June 24, 2014, which would result in the expiration of these options before the exercise. The incremental share-based compensation of USD768 thousand is recognized at the time of modification.

In the business combination of personal cloud storage business completed on September 5, 2014, the Group granted share options under the 2010 Plan to replace the unvested awards owned by the employees who are transferred to the Group, the portion of the fair-value-based measure of the replacement award attribute to pre-combination service of USD 303 thousand was allocated to the consideration, while the portion attribute to post-combination service of USD44 thousand was recorded as share based compensation expense over the remaining vesting period.

On December 1, 2014, our board of directors approved the conversion of certain vested and unvested share options with relatively high exercise price into restricted shares. In this conversion, 3,776,711 share options were cancelled and 1,505,787 restricted shares were granted. The incremental share-based compensation of USD 2,214 thousand is recorded over the remaining vesting period of 2 to 4.5 years.

In November 2014, the Company issued to a depositary bank for American Depositary Shares, 10,000,000 common shares, which were reserved for the future exercise of share options or vesting of restricted shares.

The following table summarizes the share option activity for the years ended December 31, 2014, 2015 and 2016:

							Weighted
			Weighted		Weighted-		average		Aggregate
			average		average		remaining		intrinsic
	Number of		exercise		grant-date		contractual life		value (in
	share options		price (USD)		fair value (USD)		(years)		thousands)
Outstanding, December 31, 2014		9,940,285		1.88				1.95		3,067
Vested and expected to vest at December 31, 2014		9,642,307		1.86		0.49		1.87		3,057
Exercisable at December 31, 2014		9,129,958		1.81		0.41		1.49		3,042
Granted		561,705		0.88		0.76
Forfeited		(1,494,922)		3.22
Expired		(3,606,304)		1.78
Converted to restricted shares		(80,000)		2.40
Exercised		(3,189,944)		0.25				4.46		556
Outstanding, December 31, 2015		2,130,820		2.13
Vested and expected to vest at December 31, 2015		1,008,645		1.76		0.73		4.62		464
Exercisable at December 31, 2015		1,430,870		2.16		0.86		4.03		406
Granted		-		-		-
Forfeited		(14,375)		3.21
Expired		(182,510)		2.22
Converted to restricted shares		-		-
Exercised		(440,465)		1.81
Outstanding, December 31, 2016		1,493,470		2.65				3.39		6
Vested and expected to vest at December 31, 2016		1,440,923		2.67		0.85		3.24		6
Exercisable at December 31, 2016		1,217,050		2.70		0.84		3.20		6

A summary of the restricted shares activities under the 2010 Plan for the years ended December 31, 2016 is presented below:

			Weighted-Average
	Number of		Grant-Date Fair
	restricted shares		Value
Unvested at January 1, 2015		1,505,787
Converted from share options		80,000		1.71
Vested		(390,560)
Forfeited		(763,010)
Unvested at December 31, 2015		432,217
Vested and expected to vest at December 31, 2015		367,384
Granted		1,170,000		—
Vested		(274,960)
Forfeited		(384,037)
Unvested at December 31, 2016		943,220
Vested and expected to vest at December 31, 2016		801,737

Forfeitures are estimated at the time of grant. If necessary, forfeitures are revised in subsequent periods if actual forfeitures differ from those estimates. Based upon the Company’s historical and expected forfeitures for stock options granted, the directors of the Company estimated that its future forfeiture rate would be 20% for employees and nil for directors and advisors.

The aggregate intrinsic value in the table above represents the difference between the estimated fair value of the Company’s common shares as of December 31, 2015 and 2016 and the exercise price.

Total fair values of share options vested as of December 31, 2015 and 2016 were USD 6,297 thousand and USD 6,831 thousand, respectively.

As of December 31, 2015 and 2016, there were USD 1,147 thousand and USD 1,358 thousand of unrecognized share-based compensation costs related to share options, which were expected to be recognized over a weighted-average vesting period of 4.03 and 3.20 years, respectively. To the extent the actual forfeiture rate is different from the Company’s estimate, the actual share-based compensation related to these awards may be different from the expectation.

The Black-Scholes option pricing model is used to determine the fair value of the stock options granted to employees. The fair values of stock options granted during the years ended December 31, 2014 and 2015 were estimated using the following assumptions:

Options granted to employees

Years ended December 31,	2014		2015
Risk-free interest rate⁽¹⁾		0.77% to 1.76%		0.77% to 1.76%
Dividend yield⁽²⁾		—		—
Volatility rate⁽³⁾		40.07% to 43.3%		40.07% to 43.3%
Expected term (in years)⁽⁴⁾		4.13 to 4.58		4.07 to 5.57

(1)

The risk-free interest rate of periods within the contractual life of the share option is based on the USD denominated China Government Bond yield as at the valuation dates.

(2)

The Company has no history or expectation of paying dividends on its common shares.

(3)

Expected volatility is estimated based on the average of historical volatilities of the comparable companies in the same industry as at the valuation dates.

(4)

The expected term is developed by assuming the share options will be exercised in the middle point between the vesting dates and maturity dates.

2013 share incentive plan

In November 2013, the Group adopted a share incentive plan, which is referred to as the 2013 Share Incentive Plan (“the 2013 Plan”). The purpose of the plan is to motivate, attract and retain the best available personnel by linking the personal interests of senior management to the success of the Group’s business. The Group appointed Leading Advice Holdings Limited (“Leading Advice”), a BVI company owned by the Group’s chairman and chief executive officer for no consideration, to administer the plan and as the Administrator. Leading Advice has no activities other than administering the plan and does not have employees. The Group has considered whether Leading Advice is a variable interest entity and, if so, whether the Group is the primary beneficiary. The Group concluded that it is not the primary beneficiary of Leading Advice.

On behalf of the Group, the Administrator has the authority to select the eligible participants to whom awards will be granted: determine the types of awards and the number of shares covered: establish the terms, conditions and provisions of such awards; cancel or suspend awards; and, under certain conditions to accelerate the exercisability of awards. The Administrator is authorized to interpret the 2013 Plan; to establish, amend, and rescind any rules and regulations relating to the 2013 Plan; to determine the terms of agreements entered into with recipients under the 2013 Plan; and, to make all other determinations that may be necessary or advisable for the administration of the 2013 Plan. In the event of any disagreement between the Group and Leading Advice, the Group’s decision shall be final and binding.

In November 2013, the Company issued 9,073,732 common shares to Leading Advice. Although the shares were legally issued to Leading Advice, Leading Advice does not have any of the rights of a typical common share holder. Leading Advice 1) is not entitled to dividends 2) does not have the right to vote prior to vesting and 3) does not have the right to sell the unvested portion of the awards or awards that have not been granted. In addition, upon 1) the liquidation of Leading Advice 2) the dissolution of Leading Advice and 3) the expiration of the 2013 Plan, common shares not granted as awards shall be transferred back to the Group at no consideration. Given the structure of this arrangement, while the common shares have been legally issued, the common shares issued to Leading Advice do not have the attributes of unrestricted, issued and outstanding shares. Therefore, the 9,073,732 common shares issued to Leading Advice are accounted as treasury shares until these common shares are earned by the senior management or employees for service provided to the Group.

For the awards that have been granted and become vested, Leading Advice held shares for the grantees’ benefit and exercise the voting rights on their behalf. The grantees will be entitled to dividends and have the right to request Leading Advice to transfer vested award to a transferee designated by the grantees. Shares that have been granted and vested continued to be held by and voting rights exercised by Leading Advice on behalf of the grantee at the closing of a QIPO.

Before the closing of a QIPO, the Company would have a “right of first refusal” with respect to any proposed transfer of vested restricted shares. After the closing of a QIPO, vested restricted shares may not be sold or transferred for a period of six months or a period of time determined by the underwriter (the ‘‘lock up period’’). If the grantee terminates its employment prior to the closing date of a QIPO and a trade sale, the Group would have the right to acquire the vested restricted shares from the senior officer at a market price as determined by third-party valuation experts.

Upon the closing of IPO, the administrator of the 2013 Plan was changed from Leading Advice to the Company’s compensation committee.

Under the 2013 Plan, the maximum number of restricted shares that may be granted is 9,073,732 shares.

As of December 31, 2016, 8,664,980 (2015: 7,987,435) restricted shares were granted to certain officers and employees of the Group.

(1)

5,098,345 of these restricted shares will vest over a four-year schedule in which one-fourth of the restricted shares shall be vested upon the first, second, third, and fourth anniversary of the grant date, respectively.

(2)

1,102,430 of these restricted shares will vest over a five-year schedule in which one-fifth of the restricted shares shall be vested upon the first, second, third, fourth and fifth anniversary of the grant date, respectively.

(3)

854,405 of these restricted shares will vest over a forty four-month schedule in which one-fourth of the restricted shares shall be vested upon the eighth month, and three-fourth of the restricted shares shall be vested during the remaining thirty six months.

(4)

689,700 of these restricted shares will vest over a four-year schedule in which half, one-fourth, and one-fourth of the restricted shares shall be vested upon the second, third and fourth anniversary of the grant date, respectively.

(5)

640,100 of these restricted shares will vest over a two-year schedule in which half of the restricted shares shall be vested upon the first and second anniversary of the grant date, respectively.

(6)

160,000 of these restricted shares will vest over a one-year schedule in which all of the restricted shares shall be vested upon the first anniversary of the grant date.

(7)

The remaining 120,000 of these restricted shares will vest immediately upon the grant date.

A summary of the restricted shares activities under the 2013 Plan for the years ended December 31, 2014, 2015 and 2016 is presented below:

	Number of		Weighted-Average
	restricted		Grant-Date Fair
	shares		Value
Unvested at January 1, 2014		8,095,238
Granted		4,233,558		2.89
Vested		(1,563,222)
Forfeited		(3,564,796)
Unvested at December 31, 2014		7,200,778
Vested and expected to vest at December 31, 2014		6,120,662
Unvested at January 1, 2015		7,200,778
Vested		(2,627,815)
Forfeited		(776,565)
Unvested at December 31, 2015		3,796,398
Vested and expected to vest at December 31, 2015		3,226,939
Unvested at January 1, 2016		3,796,398
Vested		(1,520,760)
Forfeited		(561,103)
Unvested at December 31, 2016		1,714,535
Vested and expected to vest at December 31, 2016		1,457,355

Forfeitures are estimated at the time of grant. If necessary, forfeitures are revised in subsequent periods if actual forfeitures differ from those estimates.

All restricted shares granted to senior officers are measured based on their grant-date fair values. Compensation expense is recognized on a straight-line basis over the requisite service period. As of December 31, 2016, total unrecognized compensation expense relating to the restricted shares was USD 10,138 thousand. 60,000 restricted shares were issued to non-employees and vested as of December 31, 2016.

2014 share incentive plan

In April 2014, the Group adopted a share incentive plan, which is referred to as the 2014 Share Incentive Plan (“the 2014 Plan”). The purpose of the plan is to motivate, attract and retain the best available personnel by linking the personal interests of senior management to the success of the Group’s business. Under the 2014 Plan, the maximum number of restricted shares that may be granted is 14,195,412 shares to certain officers, directors or employees of, or advisors or consultants to the Company and its subsidiaries and consolidated affiliated entities. The company issued 14,195,412 common shares to Leading Advice, a company owned by the Group’s chairman and chief executive officer. The issuance of common shares was to facilitate the administration of the 2014 plan. The 2014 Plan was administered by the Company’s compensation committee.

As of December 31, 2016, 14,536,000 restricted shares were granted to certain officers and employees of the Group:

(1)

9,040,500 of these restricted shares will vest over a five-year schedule in which one-fifth of the restricted shares shall be vested upon the first, second, third, fourth and fifth anniversary of the grant date, respectively.

(2)

5,400,000 restricted shares will vest over a four-year schedule in which one-fourth of the restricted shares shall be vested upon the first, second, third and fourth anniversary of the grant date, respectively.

(3)

9,000 restricted shares will vest over a two-year schedule in which half of the restricted shares shall be vested upon the first and second anniversary of the grant date, respectively.

(4)

The remaining 86,500 restricted shares will vest immediately on the grant date.

A summary of the restricted shares activities under the 2014 Plan for the years ended December 31, 2015 and 2016 is presented below:

	Number of		Weighted-Average
	restricted		Grant-Date Fair
	shares		Value
Unvested at January 1, 2015		3,896,500
Granted		3,890,500		1.53
Vested		(859,100)
Forfeited		(1,166,500)
Unvested at December 31, 2015		5,761,400
Vested and expected to vest at December 31, 2015		4,897,100
Unvested at January 1, 2016		5,761,400
Granted		6,749,000		—
Vested		(1,262,200)
Forfeited		(971,900)
Unvested at December 31, 2016		10,276,300
Vested and expected to vest at December 31, 2016		8,734,855

Forfeitures are estimated at the time of grant. If necessary, forfeitures are revised in subsequent periods if actual forfeitures differ from those estimates.

All restricted shares granted are measured based on their grant-date fair values. Compensation expense is recognized on a straight-line basis over the requisite service period. As of December 31, 2016, the total unrecognized compensation expense relating to the restricted shares was USD 12,416 thousand. 60,000 restricted shares were issued to non-employees and vested as of December 31, 2016.

Total compensation costs recognized for the years ended December 31, 2014, 2015 and 2016 are as follows:

	Years ended December 31,
(In thousands)	2014		2015		2016
Sales and marketing expenses		66		131		98
General and administrative expenses		6,407		6,701		6,267
Research and development expenses		1,171		2,896		2,983
Total		7,644		9,728		9,348

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

Basic and diluted net (loss) / income per share [Abstract]

Basic and diluted net income / (loss) per share

12 Months Ended

Dec. 31, 2016

Basic and diluted net (loss) / income per share

21.

Basic and diluted net income/ (loss) per share

Basic and diluted net income/ (loss) per share for the years ended December 31, 2014, 2015 and 2016 are calculated as follows:

(Amounts expressed in thousands of United States
dollars (“USD”), except for number of shares and per
share data)	Years ended December 31,
	2014		2015		2016
Numerator:
Net income/(loss) from continuing operations		28,269		(2,370)		(23,976)
Net loss from discontinued operations		(18,407)		(12,096)		(207)
Net income/(loss)		9,862		(14,466)		(24,183)
Less: Net (loss) attributable to the non-controlling interest		(950)		(1,299)		(72)
Net income/(loss) attributable to Xunlei Limited		10,812		(13,167)		(24,111)
Accretion of Series D to convertible redeemable preferred shares redemption value		(1,870)		—		—
Contingent beneficial conversion feature of series C to one Series C shareholder		(57)		—		—
Deemed dividend to Series D shareholder from its modification		(279)		—		—
Accretion of Series E to convertible redeemable preferred shares redemption value		(12,754)		—		—
Amortization of beneficial conversion feature of Series E		(4,139)		—		—
Deemed dividend to certain shareholders from repurchase of shares		(14,926)		—		—
Acceleration of amortization of beneficial conversion feature of Series E upon initial public offering		(49,346)		—		—
Deemed dividend to preferred shareholders upon IPO		(32,807)		—		—
Net loss attributable to Xunlei Limited’s common shareholders		(105,366)		(13,167)		(24,111)
Numerator of basic net loss per share from continuing operations		(86,959)		(1,071)		(23,904)
Numerator of basic net loss per share from discontinued operations		(18,407)		(12,096)		(207)
Numerator for diluted loss per share from continuing operations		(86,959)		(1,071)		(23,904)
Numerator for diluted loss per share from discontinued operations		(18,407)		(12,096)		(207)
Denominator:
Denominator for basic net loss per share-weighted average shares outstanding		194,711,227		335,987,595		334,155,668
Denominator for diluted net loss per share		194,711,227		335,987,595		334,155,668
Basic net loss per share from continuing operations		(0.45)		(0.00)		(0.07)
Basic net loss per share from discontinued operations		(0.09)		(0.04)		(0.00)
Diluted net loss per share from continuing operations		(0.45)		(0.00)		(0.07)
Diluted net loss per share from discontinued operations		(0.09)		(0.04)		(0.00)

The following common shares equivalents were excluded from the computation of diluted net income per common share for the periods presented because including them would have had an anti-dilutive effect:

	Years ended December 31,
	2014		2015		2016
Preferred shares—weighted average		93,213,683		—		—
Share options and restricted shares —weighted average		9,041,434		1,673,342		2,902,950

Related party transactions

12 Months Ended

Dec. 31, 2016

Related party transactions

22.

Related party transactions

The table below sets forth the related parties and their relationships with the Group:

Related Party		Relationship with the Group
Zhuhai Qianyou		Equity investment of the Group
Hao Cheng		Co-founder and shareholder of the Group
Chuan Wang		Director of the Company
Shenglong Zou		Co-founder and shareholder of the Group
Beijing Millet Technology Co., Ltd. (“Beijing Xiaomi”)		Company owned by a shareholder of the Group
Leading Advice Holdings Limited		Company owned by a Co-founder and shareholder of the Group
Vantage Point Global Limited		Shareholder of the Company
Aiden & Jasmine Limited		Shareholder of the Company
Kingsoft Corporation Limited		Shareholder of the Company
King Venture Holdings Limited		Principal shareholder of the Group (shareholding >=10%)
Xiaomi Venture Limited		Principal shareholder of the Group
Morningside Technology Investments Limited		Principal shareholder of the Group
Shenzhen Xunlei Big Data Information Service Co., Ltd.		Equity investment of the Group
Shenzhen Xunlei Finance Information Service Co., Ltd.		Subsidiary of the Group’s equity investment
Shenzhen Crystal Technology Co., Ltd.		Company owned by a Co-founder and director of the Group
Millet Communication Technology Co., Ltd. (“Millet Communication Technology”)		Company owned by a shareholder of the Group
Beijing Millet Electronic Products Co., Ltd.		Company owned by a shareholder of the Group
Beijing Millet Digital Technology Co., Ltd.		Company owned by a shareholder of the Group
Millet Technology Co., Ltd.		Company owned by a shareholder of the Group
Beijing Millet Payment Technology Co., Ltd.		Company owned by a shareholder of the Group

During the years ended December 31, 2014, 2015 and 2016, significant related party transactions were as follows:

	Years ended December 31,
(In thousands)	2014		2015		2016
Game sharing costs paid and payable to Zhuhai Qianyou (note a)		402		127		154
Repayment from Hao Cheng		85		—		—
Bandwidth revenue from Millet Technology Co., Ltd.		—		—		316
Technology service revenue from Beijing Xiaomi		303		344		1,010
Bandwidth revenue from Millet Communication Technology Co., Ltd. (note b)		—		—		2,483
Marketing expense to Millet Communication Technology Co., Ltd.		—		—		20
Advertisement revenue from Beijing Xiaomi		871		—		—
Advance to Shenglong Zou		10		—		—
Advance to Chuan Wang		7		—		—
Accrued to Aiden & Jasmine Limited (note c)		1,125		54		54
Accrued to Vantage Point Global Limited (note c)		3,012		146		146

note a – The Company obtained an exclusive game operation right from Zhuhai Qianyou, which is specialized in developing online games. According to the agreement, the Company will share revenues derived by the licensed games with Zhuhai Qianyou.

note b – In 2016, Shenzhen Onething Technology entered into a contract with Millet Communication Technology for the provision of bandwidth to Millet Communication Technology at a mutually agreed price.

note c – In 2014, the Group repurchased 3,860,733 common shares from Aiden & Jasmine Limited (Co founder’s company) for USD10,879 thousand and 10,334,679 common shares from Vantage Point Global Limited (Founder’s company) for USD29,121 thousand. According to the repurchase contract, the Company was entitled to an amount (the “Withheld Price”) to withhold any taxes with respect to this repurchase as required under the applicable laws. If the Sellers (Aiden & Jasmine Limited and Vantage Point Global Limited) have not been specifically required by the applicable governmental or regulatory authority to pay any taxes as required under the applicable laws in connection with the repurchase, after the fifth anniversary of the Closing Date, the Company will pay to the Sellers the Withheld Price with a simple interest thereon at the rate of five percent (5%) per annum (the “repayment price”) from the Closing Date. Therefore, the Withheld Price for Aiden & Jasmine Limited and Vantage Point Global Limited was USD 1,125 thousand (including interest of USD 37 thousand) and USD 3,012 thousand (including interest of USD 100 thousand) respectively. The interest accrued in 2016 was USD 54 thousand and 146 thousand for Aiden & Jasmine Limited and Vantage Point Global Limited respectively.

As of December 31, 2014, 2015 and 2016, the amounts due to / from related parties were as follows:

	December 31,		December 31,		December 31,
(In thousands)	2014		2015		2016
Amounts due to related parties
Accounts payable to Zhuhai Qianyou		84		38		45
Long-term payable to Aiden & Jasmine Limited		1,125		1,179		1,233
Long-term payable to Vantage Point Global Limited		3,012		3,158		3,304

	December 31,		December 31,		December 31,
(In thousands)	2014		2015		2016
Amounts due from related parties
Accounts receivable from Beijing Xiaomi		5		30		95
Accounts receivable from Millet Communication Technology Co., Ltd.		—		—		939
Accounts receivable from Beijing Millet Payment Technologies Limited		—		—		38
Accounts receivable from Shenzhen Xunlei Finance Information Service Co., Ltd.		—		—		5
Other receivable from Shenzhen Crystal Technology Co., Ltd.		—		—		6
Other receivable from Shenglong Zou		10		9		9
Other receivable from Chuan Wang		7		6		5

Taxation

12 Months Ended

Dec. 31, 2016

Taxation [Abstract]

Taxation

23.

Taxation

(i)	Cayman Islands

Under the current laws of the Cayman Islands, the Company is not subject to tax on income or capital gains. Additionally, upon payment of dividends by the Company to its shareholders, no Cayman Islands withholding tax will be imposed.

(ii)

PRC Enterprise Income Tax (“EIT”)

The PRC enterprise income tax is calculated based on the taxable income determined under the PRC laws and accounting standards.

On March 16, 2007, the PRC National People’s Congress promulgated the EIT Law, adopting a unified EIT rate of 25%. In addition, the EIT Law also provides a five-year transitional period starting from its effective date for those enterprises that were established before the date of promulgation of the EIT Law and that were entitled to preferential income tax rates under the then effective tax laws or regulations. On December 26, 2007, the State Council issued the “Circular for Implementation of the Transitional Preferential Policies for the Enterprise Income Tax.” Pursuant to this Circular, the transitional income tax rates for enterprises established in the Shenzhen Special Economic Zone before March 16, 2007 were 18%, 20%, 22%, 24% and 25% for 2008, 2009, 2010, 2011 and 2012, respectively. Thus, the applicable EIT rate for Giganology Shenzhen, the VIE and its subsidiaries, which were established in the Shenzhen Special Economic Zone before March 16, 2007, was 25% for each of the years 2014, 2015 and 2016.

On April 14, 2008, relevant PRC governmental regulatory authorities released further qualification criteria, application procedures and assessment processes for meeting the High and New Technology Enterprise, or HNTE status under the EIT Law which would entitle qualified and approved entities to a favorable statutory tax rate of 15%. In April 2009, the State Administration for Taxation, or SAT, issued Circular Guoshuihan 2009 No. 203 stipulating that entities qualified for the HNTE status should apply with the relevant tax authorities to enjoy the reduced EIT rate of 15% provided under the EIT Law starting from the year when the HNTE certificate becomes effective. In addition, an entity qualified for the HNTE status can continue to enjoy its remaining tax holiday from January 1, 2008 provided that it has obtained the HNTE certificate according to the new recognition criteria set by the EIT Law and the relevant regulations. In February 2011, Shenzhen Xunlei obtained the HNTE certificate and has renewed the HNTE certificate in September 2014 for the years ended December 31, 2015, 2016 and 2017, which enables Shenzhen Xunlei to enjoy the preferential tax rate of 15% for the years of 2015, 2016 and 2017.

According to a policy of the PRC State tax bureau, enterprises that engage in research and development activities are entitled to claim 150% of the research and development expenses incurred in a year as tax deductible expenses in determining their tax assessable profits for that year, or Super Deduction. Shenzhen Xunlei has been claiming this Super Deduction in ascertaining its tax assessable profits and brought forward tax losses from 2009 onwards. In addition, following the approval by the relevant tax authority in July 2010, Shenzhen Xunlei was recognized as an enterprise engaged in software development activities. Accordingly, it is entitled to a tax holiday of 2-year Exemption and 3-year 50% Reduction from 2010 onwards. In December 2013, Shenzhen Xunlei obtained the certificate of the Key Software Enterprise for the years ended December 31, 2013 and 2014, which enables Shenzhen Xunlei to enjoy the preferential tax rate of 10% for the year of 2013 and 2014. As a result, the applicable tax rate of Shenzhen Xunlei for the years ended December 31, 2014, 2015 and 2016 were 10%, 15% and 15%, respectively.

Xunlei Computer was established in 2011 in the Shenzhen Special Economic Zone, the PRC. As approved by the relevant tax authority in June 2013, Xunlei Computer was further exempted from EIT for two years commencing from its first year of profitable operation after offsetting prior years’ tax losses, followed by a 50% reduction for the next three years (“2-year Exemption and 3-year 50% Reduction”). The first year of profit operation of Xunlei Computer is 2013.

Shenzhen Onething was established in 2013 in the Shenzhen Special Economic Zone, the PRC. In 2015, Shenzhen Onething filed for the Qianhai Enterprise, which enables Shenzhen Onething to enjoy the preferential tax rate of 15% as long as it continues to file for Qianhai Enterprise in subsequent years until December 31, 2020. As a result, the applicable tax rate of Shenzhen Onething for the year ended December 31, 2016 was 15%.

The Group’s other subsidiaries and VIE’s subsidiaries, which were established after January 1, 2008, are subject to EIT at a rate of 25%.

In addition, according to the EIT Law and its implementation rules, foreign enterprises, which have no establishment or place in the PRC but derive dividends, interest, rents, royalties and other income (including capital gains) from sources in the PRC are subject to PRC withholding tax, or WHT, at 10% (a further reduced WHT rate may be available according to the applicable double tax treaty or arrangement). The 10% WHT is generally applicable to any dividends to be distributed from Giganology Shenzhen and Xunlei Computer to the Company out of any profits of Giganology Shenzhen and Xunlei Computer derived after January 1, 2008. Up to December 31, 2016, both Giganology Shenzhen and Xunlei Computer did not declare any dividend to the parent company and have determined that it has no present plan to declare and pay any dividends. The Group currently plans to continue to reinvest its subsidiaries’ undistributed earnings, if any, in its operations in China indefinitely. Accordingly, no withholding income tax was accrued or required to be accrued as of December 31, 2015 and 2016. The undistributed earnings from the Group’s PRC entities as of December 31, 2015 and 2016 amounted to USD34,313 thousand and USD19,883 thousand, respectively. An estimated foreign withholding taxes of USD3,431 thousand and USD1,988 thousand would be due if these earnings were remitted as dividends as of December 31, 2015 and 2016, respectively.

Moreover, the current EIT Law treats enterprises established outside of China with “effective management and control” located in the PRC as PRC resident enterprises for tax purposes. The term “effective management and control” is generally defined as exercising overall management and control over the business, personnel, accounting, properties, etc. of an enterprise. The Company, if considered a PRC resident enterprise for tax purposes, would be subject to the PRC Enterprise Income Tax at the rate of 25% on its worldwide income for the period after January 1, 2008. As of December 31, 2016, the Company has not accrued for PRC tax on such basis. The Company will continue to monitor its tax status.

The current and deferred portions of income tax expense included in the consolidated statements of operations are as follows:

Continuing operations	Years ended December 31,
(In thousands)	2014		2015		2016
Current income tax expenses		397		289		71
Deferred income tax benefits		66		(1,175)		(1,335)
Taxation for the year		463		(886)		(1,264)

The aggregate amount and per share effect of the tax holiday are as follows:

	Years ended December 31,
	2014		2015		2016
Aggregate dollar effect (in thousands)		2,784		(830)		(1,430)
Per share effect—basic		0.01		0.00		0.00
Per share effect—diluted		0.01		0.00		0.00

The reconciliation of total tax expense/(benefit) computed by applying the respective statutory income tax rates to pre-tax income/(loss) is as follows:

Continuing operations	Years ended December 31,
(In thousands)	2014		2015		2016
Income tax expense/(benefit) at PRC statutory rate (based on statutory tax rate applicable to enterprises in Shenzhen, China)		7,211		(438)		(6,310)
Effects of differences in tax rates in different jurisdictions applicable to entities of the Group outside of the PRC		(838)		2,400		2,145
Non-deductible expenses		714		14		12
Effect of Super Deduction available to Shenzhen Xunlei		(1,365)		-		(901)
Effect of tax holiday		(4,613)		(369)		1,430
Change in valuation allowance of deferred tax assets		291		4,750		6,396
Effect on deferred tax assets due to change in tax rates		(103)		(8)		-
Outside basis difference arising from VIE and its subsidiaries in the PRC		478		(2,174)		(5,743)
Expiration of tax loss		51		290		90
Others		(1,363)		(5,351)		1,617
Income tax expense/ (benefit)		463		(886)		(1,264)

The tax effects of temporary differences that give rise to the deferred tax asset and liability balances at December 31, 2015 and 2016 are as follows:

	December 31,		December 31,
(In thousands)	2015		2016
Deferred tax assets, current portion:
Net operating loss carried forward (Note a)		417		1,276
Amortization of intangible assets arising from intragroup transactions (Note b)		95		51
Impairment of online game licenses		23		—
Impairment of long-term equity investment		115		—
Allowance for advance to suppliers		120		—
Valuation allowance		(81)		(106)
Deferred tax assets, current portion, net		689		1,221
Deferred tax assets, non-current portion:

Net operating loss carried forward(Note a)		13,016		12,093
Amortization of intangible assets arising from intragroup transactions (Note b)		54		—
Impairment of long-term equity investment		—		348
Allowance for advance to suppliers		—		576
Valuation allowance		(4,477)		(9,745)
Deferred tax assets, non-current portion, net		8,593		3,272

Deferred tax liabilities, non-current portion:
Outside basis difference (Note c)		(6,378)		(635)

Note a:

As of December 31, 2016, the Group had tax loss carryforwards of USD 17,363 thousand, which can be carried forward to offset future taxable income. The net operating tax loss carryforwards will begin to expire as follows:

(In thousands)
2017			775
2018			5,795
2019			3,414
2020			559
2021 and thereafter			6,820
			17,363

Note b:

Before 2008, Giganology Shenzhen sold several self-developed software at a market valuation of approximately RMB42 million to Shenzhen Xunlei. Shenzhen Xunlei was entitled to capitalize the amounts as intangible assets for tax purposes and the respective amortization charges could be entitled to claim tax deduction. As a result, this transaction had created a temporary difference between the accounting base (on a group basis) and the tax base (on Shenzhen Xunlei standalone basis) and led to origination of a deferred tax asset.

Note c:

The deferred tax liabilities arising from the aggregate retained earnings and reserves of the VIE and its subsidiaries that are expected to be recovered by Giganology Shenzhen and other affiliates of the Group in the future periods, amounted to USD 25,512 thousand and USD 2,541 thousand as of December 31, 2015 and 2016, respectively.

Movement of valuation allowance is as follows:

	Years ended December 31,
(In thousands)	2014		2015		2016
Beginning balance		—		(291)		(4,559)
Additions		(291)		(4,268)		(5,292)
Write-off		—		—		—
Ending balance		(291)		(4,559)		(9,851)

In 2014, valuation allowance was provided for net operating loss carryforwards because it was more likely than not that such deferred tax assets will not be realized based on the Group's estimate of Onething’s future taxable income. In 2015, valuation allowance was provided for net operating loss carry forward of Xunlei Beijing, Xunlei Games and Onething because it was more likely than not that such deferred tax assets will not be realized based on the Group's estimate of their future taxable income, and the fact that the three entities were not included in the tax strategy plan. In 2016, valuation allowance was provided for net operating loss carryforwards of Xunlei Beijing, Xunlei Games, Onething, Beijing Xunjing and Crystal Interactive because it was more likely than not that such deferred tax assets will not be realized based on the Group's estimate of their future taxable income, and the fact that the five entities were not included in the tax strategy plan.

As of December 31, 2016, the tax returns of the Group’s subsidiaries, VIE and its subsidiaries since their respective dates of incorporation are still open to examination.

Fair value measurements

12 Months Ended

Dec. 31, 2016

Fair value measurements [Abstract]

Fair value measurements

24.

Fair value measurements

Effective January 1, 2008, the Group adopted ASC 820-10, Fair Value Measurements and Disclosures, which defines fair value, establishes a framework for measuring fair value and expands financial statement disclosures about fair value measurements. Although adoption did not impact the Group’s consolidated financial statements, ASC 820-10 requires additional disclosures to be provided on fair value measurements.

ASC 820-10 establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:

Level1—Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets

Level 2—Include other inputs that are directly or indirectly observable in the marketplace or based on quoted price in markets that are not active

Level 3—Unobservable inputs which are supported by little or no market activity and are significant to the overall fair value measurement

ASC 820-10 describes three main approaches to measuring the fair value of assets and liabilities: (1) market approach; (2) income approach and (3) cost approach. The market approach uses prices and other relevant information generated from market transactions involving identical or comparable assets or liabilities. The income approach uses valuation techniques to convert future amounts to a single present value amount. The measurement is based on the value indicated by current market expectations about those future amounts. The cost approach is based on the amount that would currently be required to replace an asset.

The following table sets forth the financial instruments, measured at fair value, by level within the fair value hierarchy as of December 31, 2015 and 2016.

	Fair value measurements as at December 31, 2015
			Quoted prices		Significant
			in active market		other		Significant
			for identical assets		observable inputs		observable inputs
(In thousands)	Total		(Level 1)		(Level 2)		(Level 3)
Cash equivalent: time deposits with original maturities less than three months		314,357		—		314,357		—
Short term investments:
Investments in financial instruments		70,328		—		70,328		—
		384,685		—		384,685		—

	Fair value measurements as at December 31, 2016
			Quoted prices		Significant
			in active market		other		Significant
			for identical assets		observable inputs		observable inputs
(In thousands)	Total		(Level 1)		(Level 2)		(Level 3)
Cash equivalent: time deposits with original maturities less than three months		115,944		—		115,944		—
Short term investments:
Investments in financial instruments		143,131		—		143,131		—
		259,075		—		259,075		—

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

Commitments and contingencies [Abstract]

Commitments and contingencies

12 Months Ended

Dec. 31, 2016

Certain risks and concentration [Abstract]

26.

Commitments and contingencies

Rental commitments

The Group leases facilities in the PRC under non-cancellable operating leases expiring on different dates. Payments under operating leases are expensed on a straight-line basis over the periods of the respective leases, including any free rental periods.

Total office rental expenses under all operating leases were USD3,068 thousand, USD2,751 thousand and USD2,382 thousand for the years ended December 31, 2014, 2015 and 2016, respectively.

Future minimum payments under non-cancellable operating leases of office rental consist of the following as of December 31, 2016:

(In thousands)
2017			2,969
2018			2,573
2019			1,009
			6,551

Bandwidth lease commitments

The Group leases bandwidth in the PRC under non-cancellable operating leases expiring on different dates. Payments under bandwidth leases are expensed on a straight-line basis over the duration of the respective lease periods, including any lease free periods.

Total bandwidth leasing costs for continuing operations under all operating leases were USD 33,545 thousand, USD 37,218 thousand and USD 55,135 thousand for the years ended December 31, 2014, 2015 and 2016. Total bandwidth leasing costs for discontinued operations under all operating leases were USD 6,828 thousand, USD 2,983 thousand and nil for the years ended December 31, 2014, 2015 and 2016.

Future minimum payments under non-cancellable bandwidth leases consist of the following as of December 31, 2016:

(In thousands)
2017			18,651
2018			322
			18,973

Capital commitments

As at December 31, 2016, the Group has unconditional purchase obligations for switchboard, servers, office software and construction in process that had not been recognized in the amount of USD 7,527 thousand.

Litigation

The Group is involved in a number of cases pending in various courts. These cases are substantially related to alleged copyright infringement as well as routine and incidental matters to its business, among others. Adverse results in these lawsuits may include awards of damages and may also result in, or even compel, a change in the Group’s business practices, which could impact the Group’s future financial results. The Group had incurred USD 1,073 thousand, USD 3,307 thousand and USD 1,669 thousand legal and litigation related expenses for the years ended December 31, 2014, 2015 and 2016, respectively.

Up to April 20, 2017, which is the date when the consolidated financial statements were issued, the Group had 61 lawsuits pending against the Group with an aggregate amount of claimed damages of approximately RMB 89.27 million (USD 12.87 million) which occurred before December 31, 2016 (2015: USD 13.98 million). Of the 61 pending lawsuits, 56 lawsuits were relating to the alleged copyright infringement in the PRC. The Group had accrued for USD 2,062 thousand litigation related expenses in ‘‘Accrued expenses and other liabilities’’ in the consolidated balance sheet as of December 31, 2016 (2015: USD 2,601 thousand), which is the most probable and reasonably estimable outcome.

The Group estimated the litigation compensation based on judgments handed down by the court, out-of-court settlements of similar cases as well as advices from the Group’s legal counsel. The Group is in the process of appealing certain judgments for which the losses had been accrued. Although the results of unsettled litigation and claims cannot be predicted with certainty, the Group does not expect that the outcome of the 61 lawsuits will result in the amounts accrued materially different from the range of reasonably possible losses. In the opinion of management, there was not at least a reasonable possibility the Company may have incurred a material loss, or a material loss in excess of a recorded accrual, with respect to loss contingencies for asserted legal and other claims. However, the outcome of litigation is inherently uncertain. Therefore, although management considers the likelihood of such an outcome to be remote, if one or more of these legal matters were resolved against the Company in a reporting period for amounts in excess of management’s expectations, the Company’s consolidated financial statements for that reporting period could be materially adversely affected.

In May 2014, the Group entered into a content protection agreement with the Motion Picture Association of America, Inc., or MPAA, and six major U.S. entertainment content providers, which are the members of MPAA. In January 2015, a number of MPAA member studios filed copyright infringement lawsuits against the Group with an aggregate amount of claimed damages of RMB 8.40 million (USD 1.37 million), and the cases are awaiting decision of first instance as of April 20, 2017. As the litigations remain in their preliminary stages and without any further development during the year and up to April 20, 2017, the Group is unable to express any opinion on the likelihood of an unfavorable outcome or any estimate of the amount or range of any potential loss. Subsequent to December 31, 2016, there were additional claims mainly related to alleged copyright infringement made in the ordinary course of business against the Group. The Group has assessed that none of these claims that occurred between January 1, 2017 and April 20, 2017 will result in the amount accrued materially different from the range of reasonably possible losses in the consolidated financial statements of the Group.

Certain risks and concentration

12 Months Ended

Dec. 31, 2016

Certain risks and concentration

27.

Certain risks and concentration

PRC regulations

Current PRC laws and regulations place certain restrictions on foreign ownership of companies that engage in internet businesses, including the provision of online video and online advertising services. Specifically, foreign ownership in an internet content provider or other value-added telecommunication service providers may not exceed 50%. The Group conducts its operations in China principally through contractual arrangements among Giganology Shenzhen, its wholly-owned PRC subsidiary, and Shenzhen Xunlei and its shareholders. Shenzhen Xunlei holds the licenses and permits necessary to conduct its resource discovery network, online advertising, online games and related businesses in China and hold various operating subsidiaries that conduct a majority of its operations in China. The Company conducts all of its operations in China through, Shenzhen Xunlei, a variable interest entity, which it consolidates as a result of a series contractual arrangements enacted. If the Company had direct ownership of Shenzhen Xunlei, it would be able to exercise its rights as a shareholder to effect changes in the board of directors of Shenzhen Xunlei, which in turn could effect changes at the management level, subject to any applicable fiduciary obligations. However, under the current contractual arrangements, it relies on Shenzhen Xunlei and its shareholders’ performance of their contractual obligations to exercise effective control. In addition, its operating contract with Shenzhen Xunlei has a term of ten years, which is subject to Giganology Shenzhen’s unilateral termination right. None of Shenzhen Xunlei or its shareholders may terminate the contracts prior to the expiration date.

Further, the Group believes that the contractual arrangements among Giganology Shenzhen, Shenzhen Xunlei and its shareholders are in compliance with PRC law and are legally enforceable. However, the Chinese government may issue from time to time new laws or new interpretations on existing laws to regulate this industry. Regulatory risk also encompasses the interpretation by the tax authorities of current tax laws, and the Group’s legal structure and scope of operations in the PRC, which could be subject to further restrictions resulting in limitations on the Company’s ability to conduct business in the PRC. The PRC government may also require the Company to restructure the Group’s operations entirely if it finds that its contractual arrangements do not comply with applicable laws and regulations. Furthermore, it could revoke the Group’s business and operating licenses, require it to discontinue or restrict its operations, restrict its right to collect revenues, block its website, require it to restructure its operations, impose additional conditions or requirements with which the Group may not be able to comply, or take other regulatory or enforcement actions against the Group that could be harmful to its business. The imposition of any of these penalties may result in a material and adverse effect on the Group’s ability to conduct the Group’s business. In addition, if the imposition of any of these penalties causes the Group to lose the rights to direct the activities of the VIE and its subsidiaries or the right to receive their economic benefits, the Group would no longer be able to consolidate the VIE. The Group does not believe that any penalties imposed or actions taken by the PRC Government would result in the liquidation of the Company, Giganology Shenzhen or Shenzhen Xunlei.

As of December 31, 2016, the aggregate retained earnings and distributable reserves of VIE and VIE’s subsidiaries amounted to approximately USD 2,541 thousand (2015: USD 25,512 thousand), which has been included in the consolidated financial statements.

As stated above, Shenzhen Xunlei holds assets that are important to the operation of the Group’s business, including patents for proprietary technology, related domain names and trademarks. If Shenzhen Xunlei or its subsidiaries falls into bankruptcy and all or part of its assets become subject to liens or rights of third-party creditors, the Group may be unable to conduct its business activities in China, which could have a material adverse effect on the Group’s future financial position, results of operations or cash flows. However, the Group believes this is a normal business risk many companies face. The Group will continue to closely monitor the financial conditions of Shenzhen Xunlei and its subsidiaries.

Shenzhen Xunlei and its subsidiaries’ assets comprise both recognized and unrecognized revenue-producing assets. The recognized revenue-producing assets include intangible assets, purchased property and equipment. The balances of these assets held by the VIE and its subsidiaries are included in “property and equipment, net” and “intangible assets, net” in the consolidated balance sheet and specifically in the VIE table on the following page. The unrecognized revenue-producing assets mainly consist of license, patents, trademarks, and domain names which are not recorded in the financial statement as they didn’t meet the recognition criteria set in ASC 350-30-25. The licenses stated above primarily consist of licenses that grant the VIE and its subsidiaries the right to produce and broadcast internet, radio, and television programs. One of them is the ICP licenses as described in note 1.

As of December 31, 2016, Shenzhen Xunlei and its subsidiaries held patents granted in the PRC and in the United States. Presently, patent applications are being examined by the State Intellectual Property Office of the PRC and also patent application is being reviewed by the United States Patent and Trademark Office.

As of December 31, 2016, Shenzhen Xunlei and its subsidiaries have applied to register trademarks, of which the Company has received registered trademarks in different applicable trademark categories including trademark registered with the United States Patent and Trademark Office and trademark registered with World Intellectual Property Organization.

The following consolidated financial information of the Group’s VIE and its subsidiaries from continuing operations was included in the accompanying consolidated financial statements, before elimination of balances with the Company and its subsidiaries, as of and for the years ended:

	As of December 31,
(In thousands)	2015		2016
Current assets:
Cash and cash equivalents		32,461		40,393
Short-term investments		69,522		28,749
Accounts receivable, net		11,573		14,824
Due from related parties		30		1,083
Deferred tax assets		351		971
Inventories		480		374
Prepayments and other current assets		31,659		15,123
Total current assets		146,076		101,517
Non-current assets:
Equity method investments		9,884		25,479
Deferred tax assets		6,791		1,849
Property and equipment, net		17,991		20,059
Construction in progress		14		574
Intangible assets, net		14,297		11,083
Goodwill		21,896		20,497
Other long-term prepayments		7,430		1,187
Total non-current assets		78,303		80,728
Total assets		224,379		182,245
Current liabilities:
Accounts payable (note a)		33,262		44,162
Due to a related party		38		45
Deferred revenue and income, current portion		24,902		24,260
Income tax payable		2,407		2,253
Accrued liabilities and other payables (note b)		131,312		104,114
Total current liabilities		191,921		174,834
Non-current liabilities:
Deferred revenue and income, non-current portion		4,751		3,539
Total non-current liabilities		4,751		3,539
Total liabilities		196,672		178,373

Note a.

The balance included inter-companies balances with the Company and its subsidiaries of USD 11,626 thousand and USD 9,360 thousand as of December 31, 2015 and 2016, respectively.

Note b.

The balance included inter-companies balances with the Company and its subsidiaries of USD 105,872 thousand and USD 91,477 thousand as of December 31, 2015 and 2016, respectively.

	Years ended December 31,
(In thousands)	2014		2015		2016
Net revenue from continuing operations		132,515		129,198		156,192
Net income / (loss) attributable to Xunlei Limited		12,677		(6,408)		(32,402)

	Years ended December 31,
(In thousands)	2014		2015		2016
Net cash provided by operating activities		70,822		41,723		3,565
Net cash (used in)/provided by investing activities		(78,335)		(51,721)		1,859
Net cash provided by financing activities		856		1,055		2,508
		(6,657)		(8,943)		7,932

Foreign exchange risk

The Group’s financing activities are denominated mainly in the USD. The RMB is not freely convertible into foreign currencies. Remittances of foreign currencies into the PRC and exchange of foreign currencies into the RMB require approval by foreign exchange administrative authorities and certain supporting documentation. The State Administration for Foreign Exchange, under the authority of the People’s Bank of China, controls the conversion of the RMB into other currencies. The revenues and expenses of the Company’s subsidiaries, consolidated VIE and its subsidiaries are generally denominated in the RMB and their assets and liabilities are denominated in the RMB.

Concentration of customer risk

The top 10 customers accounted for 16%, 26% and 18% of the net revenues for the years ended December 31, 2014, 2015 and 2016, respectively. Prior to entering into sales agreements, the Group performs credit assessments of its customers to assess the credit history of its customers. Further, the Group has not experienced any significant bad debts with respect to its accounts receivable.

Credit risk

As of December 31, 2015 and 2016, substantially all of the Group’s cash and cash equivalents were held at reputable financial institutions in the jurisdictions where the Group and its subsidiaries are located. The Group believes that it is not exposed to unusual risks as these financial institutions have high credit quality. The Group has not experienced any losses on its deposits of cash and cash equivalents.

Prior to entering into sales agreements, the Group performs credit assessments of its customers to assess the credit history of its customers. Further, the Group has not experienced any significant bad debts with respect to its accounts receivable.

Subsequent events

12 Months Ended

Dec. 31, 2016

Subsequent events [Abstract]

Subsequent events

28.

Subsequent events

Restricted shares grant

In March 2017, 1,130,000 restricted shares had been granted to certain executive officers or employees of the Group under the 2010 share incentive plan.

Repurchase of shares

In the first quarter of 2017, 465,350 common shares had been repurchased from certain executive officers or employees of the Group.

Investments

In December 2016, the Group agreed to pay USD 3.5 million (RMB 24 million) as the consideration to acquired 80% equity interests in Henan Tourism Information Co., Ltd., a company in Henan, the PRC which engages in internet audio and visual services. This acquisition was not closed as of April 20, 2017.

Restricted net assets

12 Months Ended

Dec. 31, 2016

Restricted net assets [Abstract]

Restricted net assets

29.

Restricted net assets

Relevant PRC laws and regulations permit payments of dividends by the Company’s subsidiaries, VIE and VIE’s subsidiaries in China only out of their retained earnings, if any, as determined in accordance with PRC accounting standards and regulations. In addition, the Company’s subsidiaries, VIE and VIE’s subsidiaries in China are required to make certain appropriation of net after-tax profits or increase in net assets to the statutory surplus fund (see Note 2(dd)) prior to payment of any dividends. As a result of these and other restrictions under PRC laws and regulations, the Company’s subsidiaries, VIE and VIE’s subsidiaries in China are restricted in their ability to transfer their net assets to the Company in terms of cash dividends, loans or advances, which restricted portion amounted to USD 117,728 thousand and USD 124,026 thousand as of December 31, 2015 and 2016, respectively. Even though the Company currently does not require any such dividends, loans or advances from the PRC subsidiaries, VIE and VIE’s subsidiaries for working capital and other funding purposes, the Company may in the future require additional cash resources from the Company’s subsidiaries, VIE and a VIE’s subsidiaries in China due to changes in business conditions, to fund future acquisitions and development, or merely to declare and pay dividends to make distributions to shareholders.

Kingsoft acquisition in 2014

12 Months Ended

Dec. 31, 2016

Business Combinations [Abstract]

Business Combination Disclosure [Text Block]

30.

Kingsoft acquisition in 2014

In September 2014, the Group acquired assets relating to a personal cloud storage business from Kingsoft Corporation Limited, for cash consideration of USD 33 million plus the portion of the fair value of replacement share-based awards allocated to consideration for the acquisition of USD 0.3 million. As a result of the acquisition, the Group obtained the key intellectual property to develop and expand the personal cloud storage business. The assets acquired constitute a business and the acquisition was recorded as a business combination. The allocation of the purchase price at the date of acquisition is as follows:

(In thousands)
Property and equipment			255
Intangible assets
—Trademarks			6,120
—Technology (including right-to-use)			2,381
—Non-compete agreement			1,490
Goodwill			23,057
			33,303

The business combination was completed on September 5, 2014 and the Company has finalised the purchase price allocation. The excess of purchase price over tangible assets and identifiable intangible assets acquired was recorded as goodwill. There was no liability assumed arising from the acquisition. In connection with this acquisition, the Group is obligated to issue share options to replace the unvested awards owned by the employees who are transferred to the Group, the portion of the fair-value-based measure of the replacement award attribute to pre-combination service of USD 303 thousand was allocated to the consideration, while the portion attribute to post-combination service of USD44 thousand was recorded to as share based compensation expense over the remaining vesting period. The acquired goodwill is not deductible for tax purposes. Acquisition related costs were immaterial and were included in general and administrative expenses for the year ended December 31, 2014.

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Additional information: condensed financial statements of the Company [Abstract]

Additional information: condensed financial statements of the Company

12 Months Ended

Dec. 31, 2016

Additional information: condensed financial statements of the Company

31.

Additional information: condensed financial statements of the Company

Regulation S-X require condensed financial information as to financial position, statement of cash flows and results of operations of a parent company as of the same dates and for the same periods for which audited consolidated financial statements have been presented when the restricted net assets of consolidated and unconsolidated subsidiaries together exceed 25 percent of consolidated net assets as of the end of the most recently completed fiscal year.

The Company records its investment in its subsidiaries, VIE and VIE’s subsidiaries under the equity method of accounting.

Such investments are presented on the separate condensed balance sheets of the Company as “Long-term investments”.

The subsidiaries did not pay any dividends to the Company for the periods presented. Certain information and footnote disclosures generally included in financial statements prepared in accordance with U.S. GAAP have been condensed and omitted. The footnote disclosures represent supplemental information relating to the operations of the Company, as such, these statements should be read in conjunction with the notes to the consolidated financial statements of the Group.

The Company did not have significant other commitments, long-term obligations, or guarantees as of December 31, 2016.

Condensed balance sheets

	December 31,		December 31,
(In thousands)	2015		2016
Assets
Current assets:
Cash and cash equivalents		292,175		273,160
Due from subsidiaries and consolidated VIEs		92,864		101,130
Prepayments and other current assets		1,090		348
Total current assets		386,129		374,638
Non-current assets:
Property, equipment and software, net		—		3
Investments in subsidiaries and consolidated VIEs		68,481		43,447
Total assets		454,610		418,088
Liabilities
Current liabilities:
Accounts payable		55		55
Due to subsidiaries and consolidated VIEs		388		1,862
Deferred revenue and income, current portion		211		272
Accrued liabilities and other payables		1,393		1,695
Total current liabilities		2,047		3,884
Non-current liabilities:
Deferred revenue and income, non-current		632		543
Due to related parties, non-current portion		4,337		4,537
Other long-term payable		845		886
Total liabilities		7,861		9,850
Commitments and contingencies
Shareholders’ equity
Common shares		85		83
Treasury shares 29,558,094 shares as at December 31, 2015 and 38,332,209 shares as at December 31, 2016		7		9
Other shareholders’ equity		446,657		408,146
Total Xunlei Limited’s shareholders’ equity		446,749		408,238
Total liabilities and shareholders’ equity		454,610		418,088

Condensed statements of operations

	Years ended December 31,
(In thousands)	2014		2015		2016
Revenues	—		—		—
Cost of revenues		(1,673)		(131)		—
Gross loss		(1,673)		(131)		—
Operating expenses
Research and development expenses		—		—
Sales and marketing expenses		—		—		(10)
General and administrative expenses		(996)		(1,314)		(1,193)
Total operating expenses		(996)		(1,314)		(1,203)
Operating loss		(2,669)		(1,445)		(1,203)
Interest income		6,171		5,318		1,521
Interest expense		(163)		(239)		(239)
Other income, net		7,602		(3,261)		715
Loss from subsidiaries and consolidated VIEs		(129)		(13,540)		(24,905)
Income / (loss) before income tax		10,812		(13,167)		(24,111)
Income tax		—		—		—
Net income / (loss)		10,812		(13,167)		(24,111)
Net income attributable to the non-controlling interest		—		—		—
Net income / (loss) attributable to Xunlei Limited’s common shareholders		10,812		(13,167)		(24,111)

Condensed statement of cash flows

	Years ended December 31,
(In thousands)	2014		2015		2016
Cash flows from operating activities
Net cash used in operating activities		(41,485)		(26,069)		(20,312)
Cash flows from investing activities
Net cash (used in) / generated from investing activities		(10,333)		3,812		15,557
Cash flows from financing activities
Net cash generated from / (used in) financing activities		332,412		4,975		(14,260)
Net increase / (decrease) in cash and cash equivalents		280,594		(17,282)		(19,015)
Cash and cash equivalents at beginning of year		28,863		309,457		292,175
Effect of exchange rates on cash and cash equivalents		—		—		—
Cash and cash equivalents at end of year		309,457		292,175		273,160

The entire disclosure for condensed financial information, including the financial position, cash flows, and the results of operations of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document.

Summary of significant accounting policies [Abstract]

Summary of significant accounting policies (Policies)

12 Months Ended

Dec. 31, 2016

Basis of presentation and use of estimates

(a)

Basis of presentation and use of estimates

The Restructuring was accounted for at historical costs. The assets and liabilities of Shenzhen Xunlei are consolidated in the Company’s financial statements at carryover basis.

Consolidation

(b)

Consolidation

Discontinued operations

(c)

Discontinued operations

Foreign currency translation

(d)

Foreign currency translation

The exchange rate used is released by Chinese State Administration of Foreign Exchange.

(e)

Cash and cash equivalents

Fair value of financial instruments

(f)

Short-term investments

(g)

Fair value of financial instruments

(h)

Accounts receivable, net

Some of the factors that the Group considers in determining whether a bad debt allowance is recorded on an individual customer are:

1) the customer's past payment history and whether it fails to comply with its payment schedule;

2) whether the customer is in financial difficulty due to economic or legal factors;

3) a significant dispute with the customer has occurred;

4) the objective evidence which indicates non-collectability of the accounts receivable.

The allowances provided for Accounts Receivable from continuing operations as of December 31, 2015 and 2016 were USD 0.1 million and USD 0.1 million, respectively.

(i)

Inventories

An allowance is recorded for excess inventory and obsolescence based on the lower of cost or net realizable value.

Long-term investments

(j)

Long-term investments

Property and equipment

(k)

Property and equipment

	Estimated useful lives	Residual rate
Servers and network equipment	5 years		5	%
Computer equipment	5 years		5	%
Furniture, fittings and office equipment	5 years		5	%
Motor vehicles	5 years		5	%
Leasehold improvements	shorter of lease term or 3 years		—

Impairment of long-lived assets

(l)

Goodwill

Goodwill represents the excess of the purchase price over the amounts assigned to the fair value of the assets acquired and the liabilities assumed of an acquired business.

Impairment of goodwill

(m)

Impairment of goodwill

No goodwill impairment losses were recognized for the year ended December 31, 2016 based on the impairment test performed by the Group.

Intangible assets

(n)

Intangible assets

I)	Content copyrights

Content copyrights were disposed of in July 2015 as a result of the divestiture of the Company’s online video streaming platform (see note 3 for details).

II)	Other intangible assets

(o)

Impairment of long-lived assets

Sales and marketing expenses

(p)

Commitments and contingencies

Operating leases

(q)

Operating leases

Revenue recognition

(r)

Revenue recognition

I)	Subscription revenues

II)	Advertising revenues

Transactions with third party advertising agencies

—Price is fixed and determinable—prices charged to the advertising agencies are specified in the agreements, including relevant discount and rebate rates

—Services are rendered—the Group recognizes revenue ratably over the contract period of display

Transactions with third party advertising platforms

Transactions with advertisers

III)	Other internet value-added services

i)	Online game revenues

Non-exclusive game licensed contracts

Exclusive licensing game contracts

ii)	Content sub-licensing revenue

iii)	Pay per view subscription revenue

iv)	Live video revenue

v)	Revenues from traffic referral programs

vi)	Revenues from cloud computing

The Group sells ZQB through online e-commerce platforms. The revenue from ZQB is recognized when the item is dispatched to the end customers.

Barter transactions

(s)

Barter transactions

(t)

Sales and marketing expenses

General and administrative expenses

(u)

General and administrative expenses

General and administrative expenses consist primarily of salary and benefits, professional service fees, legal expenses and other administrative expenses.

Research and development costs

(v)

Research and development costs

Taxation and uncertain tax positions

(w)

Taxation and uncertain tax positions

Transition from PRC Business Tax to PRC Value Added Tax

Retirement benefits

(x)

Retirement benefits

Share-based compensation

(y)

Share-based compensation

Government subsidies

(z)

Government subsidies

Segment reporting

(aa)

Segment reporting

An analysis of the different types of revenues for the years ended December 31, 2014, 2015 and 2016 are summarized as follows:

Revenue from continuing operations	Years ended December 31,
(In thousands)	2014		2015		2016
Subscription revenue		98,189		82,435		90,163
Advertising revenue		5,834		4,802		16,874
Other internet value-added services (note a)		31,789		42,759		49,929
Total		135,812		129,996		156,966

note a:

Net income / (loss) per share

(bb)

Net income / (loss) per share

Comprehensive income

(cc)

Comprehensive income

Profit appropriation and statutory reserves

(dd)

Profit appropriation and statutory reserves

There are no legal requirements in the PRC to fund these reserves by transfer of cash to restricted accounts, and the Group does not do so.

	December 31,		December 31,
(In thousands)	2015		2016
Paid-in capital		112,435		118,733
Additional paid-in capital		161		161
Statutory reserves		5,132		5,132
Total		117,728		124,026

Dividends

(ee)

Dividends

Recent accounting pronouncements

(ff)

Recent accounting pronouncements

Organization and nature of operations (Tables)

12 Months Ended

Dec. 31, 2016

Organization and nature of operations [Abstract]

Accompanying Consolidated Financial Statements Include Financial Statements of Company, Subsidiaries, Variable Interest Entity ("VIE") and VIE's Subsidiaries

Name of entities	Place of incorporation	Date of incorporation	Relationship	% of direct or indirect economic ownership	Principal activities
Shenzhen Xunlei Networking Technologies, Co., Ltd. (“Shenzhen Xunlei”)	China	January 2003	VIE	100%	Development of software, provision of online and related advertising, membership subscription and online game services; as well as sales of software licenses

Giganology (Shenzhen) Co., Ltd. (“Giganology Shenzhen”)	China	June 2005	Subsidiary	100%	Development of computer software and provision of information technology services to related companies

Shenzhen Xunlei Wangwenhua Co., Ltd. (formerly known as “Shenzhen Fengdong Networking Technologies Co., Ltd.”) (“Wangwenhua”)	China	December 2005	VIE’s subsidiary	100%	Development of software for related companies

Xunlei Networking Technologies (Beijing) Co., Ltd. (“Beijing Xunlei”)	China	June 2009	VIE’s subsidiary	100%	Development of software for related companies

Shenzhen Zhuolian Software Co., Ltd. (formerly known as “Xunlei Software (Shenzhen) Co., Ltd.”) (“Zhuolian Software”)	China	January 2010	VIE’s subsidiary	100%	Provision of software technology development for related companies

Name of entities	Place of incorporation	Date of incorporation	Relationship	% of direct or indirect economic ownership		Principal activities
Xunlei Games Development (Shenzhen) Co., Ltd. (“Xunlei Games”)	China	February 2010	VIE’s subsidiary	70	%	Development of online game and computer software for related companies and provision of advertising services

Xunlei Network Technologies Limited (“Xunlei BVI”)	British Virgin Islands	February 2011	Subsidiary	100	%	Holding company

Xunlei Network Technologies Limited (“Xunlei HK”)	Hong Kong	March 2011	Subsidiary	100	%	Development computer software of related companies and provision of advertising services

Xunlei Computer (Shenzhen) Co., Ltd. (“Xunlei Computer”)	China	November 2011	Subsidiary	100	%	Development of computer software and provision of information technology services to related companies

Shenzhen Onething Technologies Co., Ltd. (“Onething”)	China	September 2013	VIE’s subsidiary	100	%	Development of computer software and provision of information technology services to related companies

Beijing Xunjing Technologies Co., Ltd. (formerly known as “Wangxin Century Technologies (Beijing) Co., Ltd.”) (“Beijing Xunjing”)	China	October 2015	VIE’s subsidiary	100	%	Development of computer software and provision of information technology services

Shenzhen Crystal Interactive Technologies Co., Ltd. (“Crystal Interactive”)	China	May 2016	VIE’s subsidiary	100	%	Development of computer software and provision of information technology services

Shenzhen Xunlei Venture Capital Partnership Enterprise (Limited Partnership) (“Xunlei Venture Capital”)	China	June 2016	VIE’s subsidiary	99	%	Investments in industries and consultation in investments

Shenzhen Xunlei Kankan Information Technologies Co., Ltd. (formerly known as “155 Networking (Shenzhen) Co., Ltd.”) (“Xunlei Kankan”)	China	August 2008	VIE’s subsidiary	100	%	Development of software for related companies(note a)

Note a: Xunlei Kankan was disposed in 2015. See note 3 for details.

Note b: The English names of the PRC companies represent management’s translation of their Chinese names of these companies as they have not adopted formal English names.

Summary of significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2016

Summary of significant accounting policies [Abstract]

Analysis of Different Types of Revenues

Revenue from continuing operations	Years ended December 31,
(In thousands)	2014		2015		2016
Subscription revenue		98,189		82,435		90,163
Advertising revenue		5,834		4,802		16,874
Other internet value-added services (note a)		31,789		42,759		49,929
Total		135,812		129,996		156,966

note a:

Schedule of Balances of Registered Capital, Additional Paid-in-Capital and Statutory Reserves

	December 31,		December 31,
(In thousands)	2015		2016
Paid-in capital		112,435		118,733
Additional paid-in capital		161		161
Statutory reserves		5,132		5,132
Total		117,728		124,026

Discontinued operations (Tables)

12 Months Ended

Dec. 31, 2016

Discontinued operations [Abstract]

Schedule of results of the discontinued operation, assets and liabilities of the discontinued operation and cash flows (used in) discontinued operations

Results of the discontinued operation

USD (In thousands)	2014		2015		2016
Revenues, net of rebates and discounts		47,075		15,677		—
Business taxes and surcharges		(1,480)		(447)		—
Net revenues		45,595		15,230		—
Cost of revenues		(42,704)		(13,240)		—
Gross profit		2,891		1,990		—
Operating expenses
Research and development expenses		(6,035)		(3,245)		5
Sales and marketing expenses		(15,726)		(7,384)		(27)
General and administrative expenses		(3,016)		(3,051)		(221)
Total operating expenses		(24,777)		(13,680)		(243)
Net gain from exchanges of content copyrights		1,556		137		—
Operating loss		(20,330)		(11,553)		(243)
Gain on disposal of Kankan		—		1,505		—
Income taxes benefits/(expenses)		1,923		(2,048)		36
Loss from discontinued operations		(18,407)		(12,096)		(207)

Assets and liabilities of the discontinued operation

USD (In thousands)	December 31, 2014
Assets
Accounts receivable, net		23,741
Prepayments and other current assets		670
Copyrights related to content-current portion		16,013
Property and equipment, net		1,111
Intangible assets		4,997
Prepayment for content		456
Other long-term prepayments and receivables		57
Total assets held for sale		47,045

Liabilities
Accounts payables		25,267
Deferred revenue, current portion		1,018
Accrued liabilities and other payables		1,082
Total liabilities held for sale		27,367

Cash flows generated from/ (used in) discontinued operations

USD (In thousands)	2014		2015		2016
Net cash generated from/(used in) operating activities		2,293		(1,554)		(215)
Net cash (used in)/generated from investing activities		(34,661)		9,135		—
Net cash used in financing activities		—		—		—
Net cash flow for the year		(32,368)		7,581		(215)

Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
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-URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721665-107760

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
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-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1474-107760

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
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-URI http://asc.fasb.org/extlink&oid=64862545&loc=SL51724579-110230

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
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-Paragraph 5C
-URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721675-107760

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 11: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 12: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Cash and cash equivalents [Abstract]

Cash and cash equivalents (Tables)

12 Months Ended

Dec. 31, 2016

Summary of Cash on Hand and Cash Held at Bank

	December 31, 2015				December 31, 2016
			USD				USD
(In thousands)	Amount		equivalent		Amount		equivalent
RMB		606,845		93,454		538,660		77,651
USD		268,198		268,198		121,726		121,726
HKD		969		125		987		127
Total				361,777				199,504

Summary of Time Deposits

	December 31, 2015				December 31, 2016
			USD				USD
(In thousands)	Amount		equivalent		Amount		equivalent
RMB		349,099		53,760		—		—
USD		260,597		260,597		115,944		115,944
Total				314,357				115,944

Accounts receivable, net (Tables)

12 Months Ended

Dec. 31, 2016

Accounts receivable, net [Abstract]

Schedule of Accounts Receivable

	December 31,		December 31,
(In thousands)	2015		2016
Accounts receivable		11,392		14,655
Less: Allowance for doubtful accounts		(126)		(119)
Accounts receivable, net		11,266		14,536

Schedule of Allowance for Doubtful Accounts

The following table presents movement in the allowance for doubtful accounts:

	December 31,		December 31,		December 31,
(In thousands)	2014		2015		2016
Balance at beginning of the year		—		131		126
Additions		523		4		—
Write-off		(393)		—		—
Exchange difference		1		(9)		(7)
Balance at end of the year		131		126		119

Prepayments and other assets (Tables)

12 Months Ended

Dec. 31, 2016

Prepayments and other assets [Abstract]

Schedule of Prepayments and Other Assets

	December 31,		December 31,
(In thousands)	2015		2016
Current portion:
Advance to suppliers		882		2,392
Interest-free loans to employees (note a)		3,200		3,964
Advance to employees for business purposes		957		351
Interest receivable		564		210
Rental and other deposits		224		1,014
Prepayment for share repurchase plan (note b)		712		—
Prepaid management insurance		209		145
Receivable from Nesound (note c)		4,004		3,748
Prepayment for taxation		2,041		1,392
Others		275		377
Total of prepayments and other current assets		13,068		13,593
Non-current portion:
Prepayments for online game licenses		4,786		490
Long term receivable		1,812		—
Low-interest loans to employees, non-current portion (note d)		833		697
Total of long-term prepayments and other assets		7,431		1,187

	Note a:	The Group had entered into loan contracts with certain employees as at December 31, 2015 and 2016, under which the Group provided interest-free loans to these employees. The loan amounts vary amongst different employees and are repayable on demand.

	Note b:	As of December 31, 2015, the prepayment for share repurchase plan represented prepayment made to a securities broker for a share repurchase program up to USD 20 million announced in December 2014. In January 2016, the Company announced another share repurchase program to purchase up to USD 20 million shares and prepaid USD 0.7 million to a securities broker. As of December 31, 2016, all the prepayment has been utilized.

	Note c:	The Group sold Kankan to Nesound in July 2015. As at December 31, 2016, there is a balance receivable amounted to USD 3,748 thousand which was past due. The Group have brought the claim against Nesound to the arbitration tribunal and considered that the balances can be collected in full.

	Note d:	The Group had entered into loan contracts with certain employees as at December 31, 2015 and 2016, under which the Group provided low-interest loans to these employees. The loan amounts vary amongst different employees and are repayable in equal instalments on a monthly basis over the term of 10 years.

Property and equipment (Tables)

12 Months Ended

Dec. 31, 2016

Property and equipment [Abstract]

Schedule of Property and Equipment

	December 31,		December 31,
(In thousands)	2015		2016
Servers and network equipment		37,332		42,641
Computer equipment		1,544		1,538
Furniture, fixtures and office equipment		856		845
Motor vehicles		320		299
Leasehold improvements		2,504		2,794
Total original costs		42,556		48,117
Less: Accumulated depreciation		(24,534)		(27,675)
Sub-total		18,022		20,442
Construction in progress		14		574
Total		18,036		21,016

Summary of Depreciation Expense

	December 31,		December 31,		December 31,
(In thousands)	2014		2015		2016
Cost of revenues		5,652		5,003		5,848
General and administrative expenses		715		628		306
Sales and marketing expenses		123		7		5
Research and development expenses		10		8		6
Total		6,500		5,646		6,165

Intangible assets, net (Tables)

12 Months Ended

Dec. 31, 2016

Intangible assets, net [Abstract]

Schedule of Intangible Assets

	December 31, 2015								December 31, 2016
							Net book								Net book
(In thousands)	Cost		Amortization		Impairment		value		Cost		Amortization		Impairment		value
Land use rights		5,123		(409)		—		4,714		4,796		(543)		—		4,253
Trademarks		5,812		(1,107)		—		4,705		5,441		(1,814)		—		3,627
Non-compete agreement		1,415		(472)		—		943		1,325		(773)		—		552
Technology (including right-to-use)		2,261		(377)		—		1,884		2,117		(617)		—		1,500
Acquired computer software		619		(255)		—		364		884		(420)		—		464
Internal use software development costs		675		(641)		—		34		631		(631)		—		—
Online game licenses (note)		5,827		(4,268)		(770)		789		5,454		(4,383)		(721)		350
		21,732		(7,529)		(770)		13,433		20,648		(9,181)		(721)		10,746

Note:

As of December 31, 2015 and 2016, full provision for impairment has been provided for an online game license due to significant under-performance in the past.

Schedule of Amortization Expense Recognized

	Years ended December 31
(In thousands)	2014		2015		2016
Cost of Revenues		1,141		693		403
General and administrative expenses		372		386		323
Research and development expenses		542		1,589		1,497
Total		2,055		2,668		2,223

Schedule of Estimated Aggregate Amortization Expense

(In thousands)	Intangible assets
2017		2,057
2018		1,623
2019		1,251
2020		1,233
2021 and thereafter		4,582

Schedule of Weighted Average Amortization Periods of Intangible Assets

	December 31,		December 31,
(In year)	2015		2016
Land use right		30		30
Trademarks		7		7
Non-compete agreement		4		4
Technology (including right-to-use)		8		8
Acquired computer software		5		5
Internal use software development costs		5		5
Online game licenses		3		3
Total weighted average amortization periods		11		11

Inventories (Tables)

12 Months Ended

Dec. 31, 2016

Inventories [Abstract]

Schedule of inventories

	December 31,		December 31,
(In thousands)	2015		2016
ZQB (note a)		92		31
XZB (note b)		76		152
Online shopping mall inventories (note c)		153		47
Others		159		144
Total		480		374

Note a:

ZQB, a proprietary hardware connected to users’ network routers, can allocate users’ idle uplink capacity to the Company for further allocation to internet content providers.

Note b:

XZB is a personal cloud hardware, which can remotely control downloading through mobile phones or computers, to expand storage of terminals unlimitedly and share data in cloud storage.

Note c:

online shopping mall inventories include Xiaomi TV box, gaming discs etc.

Long-term investments (Tables)

12 Months Ended

Dec. 31, 2016

Long-term investments [Abstract]

Schedule of Long-Term Investments

	December 31,		December 31,
(In thousands)	2015		2016
Equity method investments:
Balance at beginning of the year		2,965		2,162
Additions (i)		—		1,442
Disposal (iii)		—		(701)
Share of loss from equity investees		(12)		(195)
Dilution gains arising from deemed disposal of investments (iv)		702		—
Transfer to cost method investments		(1,349)		(786)
Exchange differences		(144)		(132)
Balance at end of the year		2,162		1,790
Cost method investments:
Balance at beginning of the year		2,533		9,157
Additions (i)(ii)		6,506		32,707
Disposal (iii)		—		(2,220)
Dilution gains arising from deemed disposal of investment (iii)(iv)		—		689
Transfer from equity method investments		1,349		786
Exchange difference		(429)		(463)
Less: impairment loss on long-term investments		(802)		(1,654)
Balance at end of the year		9,157		39,002

Total long-term investments		11,319		40,792

Schedule of Equity Investments, Percentage of Ownership of Common Share

	Percentage of ownership of shares
	as of December 31,
Investee	2015			2016
Equity method investments:
Zhuhai Qianyou Technology, Co., Ltd. (“Zhuhai Qianyou”),		19.00	%		19.00	%
Guangzhou Yuechuan Network Technology, Co., Ltd. (“Guangzhou Yuechuan”) (iii)		19.13	%		—
Shenzhen Xunlei Big Data Information Service Co., Ltd. (“Big Data”) (i)		—			43.16	%
Cost method investments:
Guangzhou Yuechuan Network Technology, Co., Ltd. (“Guangzhou Yuechuan”) (iii)		—			9.30	%
Shenzhen Kushiduo Network Science and Technology Co., Ltd. (“Shenzhen Kushiduo”)(ii)(iv)		12.5	%		10.00	%
Shanghai Guozhi Electronic Technology Co., Ltd. (“Shanghai Guozhi”)		21.00	%		16.80	%
Guangzhou Wucai Information Technology Co., Ltd.(“Guangzhou Wucai”) (v)		10.00	%		—
Guangzhou Hongsi Network Technology Co., Ltd.(“Guangzhou Hongsi”)		19.90	%		19.90	%
Tianjin Kunzhiyi Network Technology Co., Ltd.(“Tianjin Kunzhiyi”) (iv)		19.99	%		—
Chengdu Diting Technology, Co., Ltd. (“Chengdu Diting”) (iv)		13.27	%		12.74	%
Suzhou Heidisi Network Technology Co., Ltd.("Suzhou Heidisi") (ii) (v)		19.90	%		—
Xiamen Diensi Network Technology Co., Ltd.("Xiamen Diensi") (i)(ii)(iv)		15.00	%		14.25	%
Nanjing Qianyi Video Information Technology Co., Ltd.("Nanjing Qianyi") (ii)(iii)		20.00	%		—
11.2 Capital I, L.P. ("11.2 Capital") (ii)		2.24	%		2.05	%
Cloudtropy (i)(ii)		1.13	%		9.69	%
Shanghai Lexiang Technology Co., Ltd. ("Shanghai Lexiang") (i)		—			15.00	%
Hangzhou Feixiang Data Technology Co., Ltd. ("Hangzhou Feixiang") (i)		—			20.00	%
Shenzhen Meizhi Interactive Technology Co., Ltd. ("Meizhi Interactive") (i)(iv)		—			8.13	%
Beijing Yunhui Tianxia Technology Co., Ltd. ("Yunhui Tianxia") (i)		—			7.50	%
Arashi Vision Interative (Cayman) Inc. ("Insta 360") (i)		—			11.46	%

Cloudin Technology (Cayman) Limited ("Cloudin") (i)		—			4.47	%
Shenzhen RenJian RenAi Networking Technology Co., Ltd. (“RenJian RenAi”)		—			—

(i)	In 2016, the Group made an equity investment in a privately-held company, Big Data, of USD 1,442 thousand for 43.16% equity interest. The Group classified Big Data as an equity method investment as it had only significant influence instead of control over Big Data.

(ii)

(iii)

(iv)

(v)

Deferred revenue and income (Tables)

12 Months Ended

Dec. 31, 2016

Deferred revenue and income [Abstract]

Schedule of Deferred Revenue and Income

	December 31,		December 31,
(In thousands)	2015		2016
Deferred revenue
Membership subscription revenues		24,502		22,115
Online game revenues (i)		1,120		1,490
Deferred income
Government grants (ii)		4,032		4,195
Reimbursement from the depository (iii)		842		814
Total		30,496		28,614
Less: non-current portion (iv)		(5,383)		(4,082)
Deferred revenue and income, current portion		25,113		24,532

(i)

(ii)

(iii)

(iv)

Accrued liabilities and other payables (Tables)

12 Months Ended

Dec. 31, 2016

Accrued liabilities and other payables [Abstract]

Schedule of Accrued Liabilities and Other Payables

	December 31,		December 31,
(In thousands)	2015		2016
Payroll and welfare		10,570		11,322
Agency commissions and rebates—online advertising		2,443		2,297
Payables for advertisement on exclusive online games		1,643		1,521
Receipts in advance from customers (note a)		—		5,538
Tax levies		1,605		1,864
Payables for purchase of equipment		4,999		3,235
Legal and litigation related expenses (Note 26)		2,601		2,904
Professional fees		908		1,007
Staff reimbursements		611		452
Rental expense		4		5
Payables for proceeds from selling exercised stock options		177		352
Payables for gaming distribution		158		147
Payables to Nesound		622		807
Others		1,038		1,680
Total		27,379		33,131

note a: Receipts in advance from customers represents prepayment from a customer in respect of CDN and advertisements services.

Redeemable convertible preferred shares (Tables)

12 Months Ended

Dec. 31, 2016

Subscription Rights [Member]

Series E Preferred Shares [Member] | Convertible Redeemable Preferred Shares [Member]

The major assumptions used in calculating the fair value of the Series D warrants include:

	February 6,
	2014
Spot price⁽¹⁾		4.47
Risk-free interest rate⁽²⁾		0	%*
Volatility rate⁽³⁾		0	%*
Dividend yield⁽⁴⁾		—

Given that the maturity date of Series D warrant was February 6, 2014, the volatility rate and risk-free interest rate did not affect the valuation of the warrant on February 6, 2014.

Summary of Redeemable Convertible Preferred Shares

	December 31,
(In thousands)	2014
Beginning balance		—
Addition		275,314
Exercise of Series E subsequent sale rights		28,568
BCF upon Series E		(53,486)
Amortisation of BCF of Series E		4,139
Accretion of Series E to convertible redeemable preferred shares redemption value		12,754
Acceleration of amortization of BCF of Series E upon IPO		49,346
Deemed dividend to preferred shareholders upon IPO		27,396
Converted to common shares upon IPO		(344,031)
Ending balance		—

Series D Warrants [Member]

Series D Warrants [Member] | Convertible Redeemable Preferred Shares [Member]

The major assumptions used in calculating the fair value of the Subscription Rights include:

	March 5,			April 24,
	2014			2014
Spot price⁽¹⁾		3.31 - 4.65			3.39 - 4.64
Risk-free interest rate⁽²⁾		0.04	%		0.02	%
Volatility rate⁽³⁾		38.12	%		42.74	%
Dividend yield⁽⁴⁾		—			—

(1)

(2)

Risk-free interest rate – based on the US Treasury Bond & Notes BFV curve from Bloomberg as at the valuation date.

(3)

Volatility – based on the average historical volatility of the comparable companies from Bloomberg as at the valuation date.

(4)

The Company has no history or expectation of paying dividends on its common shares.

Summary of Redeemable Convertible Preferred Shares

	Year ended		Year ended
	December 31,2013		December 31,2014
Beginning balance		35,990		40,290
Deemed dividend to Series D shareholder from its modification		—		279
Accretion of Series D to convertible redeemable preferred shares redemption value		4,300		1,870
Repurchase of preferred shares		—		(15,003)
Deemed dividend to preferred shareholders upon IPO		—		4,008
Converted to common shares upon IPO		—		(31,444)
Ending balance		40,290		—

Series E Warrants [Member]

Series E Warrants [Member] | Convertible Redeemable Preferred Shares [Member]

The major assumptions used in calculating the fair value of the Series E warrants include:

	March 5,
	2014
Spot price⁽¹⁾		3.31 - 4.65
Risk-free interest rate⁽²⁾		0.04% - 0.12	%
Volatility rate⁽³⁾		38.39% - 38.81	%
Dividend yield⁽⁴⁾		—

(1)

(2)

Risk-free interest rate – based on the US Treasury Bond & Notes BFV curve from Bloomberg as at the valuation date.

(3)

Volatility – based on the average historical volatility of the comparable companies from Bloomberg as at the valuation date.

(4)

The Company has no history or expectation of paying dividends on its common shares.

Schedule of share repurchase activity

The major assumptions used in calculating the fair value of the Series E warrants include:

	March 5,
	2014
Spot price⁽¹⁾		4.50 - 4.65
Risk-free interest rate⁽²⁾		0.12	%
Volatility rate⁽³⁾		38.81	%
Dividend yield⁽⁴⁾		—

(1)

(2)

Risk-free interest rate – based on the US Treasury Bond & Notes BFV curve from Bloomberg as at the valuation date.

(3)

Volatility – based on the average historical volatility of the comparable companies from Bloomberg as at the valuation date.

(4)

The Company has no history or expectation of paying dividends on its common shares.

Repurchase of shares (Tables)

12 Months Ended

Dec. 31, 2016

Repurchase of shares [Abstract]

	Total Number of
	ADSs Purchased as
	Part of the Publicly		Average Price
Periods	Announced Plan		Paid Per ADS
March 15 – March 30		408,985		6.22
April 1– April 14		457,900		6.61
May 2 – May 31		449,696		6.28
June 9 – June 30		111,459		5.24
July 1 – July 29		555,357		5.33
August 1 – August 30		229,695		5.83
September 6 – September 30		15,467		5.33
October 13 - October 27		31,400		5.11
November 18 – November 30		21,229		4.61
December 2 – December 30		173,312		4.02
Total		2,454,500

Share-based compensation (Tables)

12 Months Ended

Dec. 31, 2016

Summary of Share Option Activity

The following table summarizes the share option activity for the years ended December 31, 2014, 2015 and 2016:

							Weighted
			Weighted		Weighted-		average		Aggregate
			average		average		remaining		intrinsic
	Number of		exercise		grant-date		contractual life		value (in
	share options		price (USD)		fair value (USD)		(years)		thousands)
Outstanding, December 31, 2014		9,940,285		1.88				1.95		3,067
Vested and expected to vest at December 31, 2014		9,642,307		1.86		0.49		1.87		3,057
Exercisable at December 31, 2014		9,129,958		1.81		0.41		1.49		3,042
Granted		561,705		0.88		0.76
Forfeited		(1,494,922)		3.22
Expired		(3,606,304)		1.78
Converted to restricted shares		(80,000)		2.40
Exercised		(3,189,944)		0.25				4.46		556
Outstanding, December 31, 2015		2,130,820		2.13
Vested and expected to vest at December 31, 2015		1,008,645		1.76		0.73		4.62		464
Exercisable at December 31, 2015		1,430,870		2.16		0.86		4.03		406
Granted		-		-		-
Forfeited		(14,375)		3.21
Expired		(182,510)		2.22
Converted to restricted shares		-		-
Exercised		(440,465)		1.81
Outstanding, December 31, 2016		1,493,470		2.65				3.39		6
Vested and expected to vest at December 31, 2016		1,440,923		2.67		0.85		3.24		6
Exercisable at December 31, 2016		1,217,050		2.70		0.84		3.20		6

Schedule of Fair Values of Stock Options Granted

The fair values of stock options granted during the years ended December 31, 2014 and 2015 were estimated using the following assumptions:

Options granted to employees

Years ended December 31,	2014		2015
Risk-free interest rate⁽¹⁾		0.77% to 1.76%		0.77% to 1.76%
Dividend yield⁽²⁾		—		—
Volatility rate⁽³⁾		40.07% to 43.3%		40.07% to 43.3%
Expected term (in years)⁽⁴⁾		4.13 to 4.58		4.07 to 5.57

(1)

The risk-free interest rate of periods within the contractual life of the share option is based on the USD denominated China Government Bond yield as at the valuation dates.

(2)

The Company has no history or expectation of paying dividends on its common shares.

(3)

Expected volatility is estimated based on the average of historical volatilities of the comparable companies in the same industry as at the valuation dates.

(4)

The expected term is developed by assuming the share options will be exercised in the middle point between the vesting dates and maturity dates.

Schedule of Recognized Compensation Costs

Total compensation costs recognized for the years ended December 31, 2014, 2015 and 2016 are as follows:

	Years ended December 31,
(In thousands)	2014		2015		2016
Sales and marketing expenses		66		131		98
General and administrative expenses		6,407		6,701		6,267
Research and development expenses		1,171		2,896		2,983
Total		7,644		9,728		9,348

2013 Plan [Member]

Summary of Restricted Shares Activities

A summary of the restricted shares activities under the 2013 Plan for the years ended December 31, 2014, 2015 and 2016 is presented below:

	Number of		Weighted-Average
	restricted		Grant-Date Fair
	shares		Value
Unvested at January 1, 2014		8,095,238
Granted		4,233,558		2.89
Vested		(1,563,222)
Forfeited		(3,564,796)
Unvested at December 31, 2014		7,200,778
Vested and expected to vest at December 31, 2014		6,120,662
Unvested at January 1, 2015		7,200,778
Vested		(2,627,815)
Forfeited		(776,565)
Unvested at December 31, 2015		3,796,398
Vested and expected to vest at December 31, 2015		3,226,939
Unvested at January 1, 2016		3,796,398
Vested		(1,520,760)
Forfeited		(561,103)
Unvested at December 31, 2016		1,714,535
Vested and expected to vest at December 31, 2016		1,457,355

2010 share incentive plan [Member]

Summary of Restricted Shares Activities

A summary of the restricted shares activities under the 2010 Plan for the years ended December 31, 2016 is presented below:

			Weighted-Average
	Number of		Grant-Date Fair
	restricted shares		Value
Unvested at January 1, 2015		1,505,787
Converted from share options		80,000		1.71
Vested		(390,560)
Forfeited		(763,010)
Unvested at December 31, 2015		432,217
Vested and expected to vest at December 31, 2015		367,384
Granted		1,170,000		—
Vested		(274,960)
Forfeited		(384,037)
Unvested at December 31, 2016		943,220
Vested and expected to vest at December 31, 2016		801,737

2014 Plan [Member]

Summary of Restricted Shares Activities

A summary of the restricted shares activities under the 2014 Plan for the years ended December 31, 2015 and 2016 is presented below:

	Number of		Weighted-Average
	restricted		Grant-Date Fair
	shares		Value
Unvested at January 1, 2015		3,896,500
Granted		3,890,500		1.53
Vested		(859,100)
Forfeited		(1,166,500)
Unvested at December 31, 2015		5,761,400
Vested and expected to vest at December 31, 2015		4,897,100
Unvested at January 1, 2016		5,761,400
Granted		6,749,000		—
Vested		(1,262,200)
Forfeited		(971,900)
Unvested at December 31, 2016		10,276,300
Vested and expected to vest at December 31, 2016		8,734,855

Basic and diluted net income / (loss) per share (Tables)

12 Months Ended

Dec. 31, 2016

Basic and diluted net (loss) / income per share [Abstract]

Schedule of Basic and Diluted Net (Loss) / Income Per Share

(Amounts expressed in thousands of United States
dollars (“USD”), except for number of shares and per
share data)	Years ended December 31,
	2014		2015		2016
Numerator:
Net income/(loss) from continuing operations		28,269		(2,370)		(23,976)
Net loss from discontinued operations		(18,407)		(12,096)		(207)
Net income/(loss)		9,862		(14,466)		(24,183)
Less: Net (loss) attributable to the non-controlling interest		(950)		(1,299)		(72)
Net income/(loss) attributable to Xunlei Limited		10,812		(13,167)		(24,111)
Accretion of Series D to convertible redeemable preferred shares redemption value		(1,870)		—		—
Contingent beneficial conversion feature of series C to one Series C shareholder		(57)		—		—
Deemed dividend to Series D shareholder from its modification		(279)		—		—
Accretion of Series E to convertible redeemable preferred shares redemption value		(12,754)		—		—
Amortization of beneficial conversion feature of Series E		(4,139)		—		—
Deemed dividend to certain shareholders from repurchase of shares		(14,926)		—		—
Acceleration of amortization of beneficial conversion feature of Series E upon initial public offering		(49,346)		—		—
Deemed dividend to preferred shareholders upon IPO		(32,807)		—		—
Net loss attributable to Xunlei Limited’s common shareholders		(105,366)		(13,167)		(24,111)
Numerator of basic net loss per share from continuing operations		(86,959)		(1,071)		(23,904)
Numerator of basic net loss per share from discontinued operations		(18,407)		(12,096)		(207)
Numerator for diluted loss per share from continuing operations		(86,959)		(1,071)		(23,904)
Numerator for diluted loss per share from discontinued operations		(18,407)		(12,096)		(207)
Denominator:
Denominator for basic net loss per share-weighted average shares outstanding		194,711,227		335,987,595		334,155,668
Denominator for diluted net loss per share		194,711,227		335,987,595		334,155,668
Basic net loss per share from continuing operations		(0.45)		(0.00)		(0.07)
Basic net loss per share from discontinued operations		(0.09)		(0.04)		(0.00)
Diluted net loss per share from continuing operations		(0.45)		(0.00)		(0.07)
Diluted net loss per share from discontinued operations		(0.09)		(0.04)		(0.00)

Schedule of Anti-dilutive Shares Excluded from Computation of Diluted Net Income per Common Share

	Years ended December 31,
	2014		2015		2016
Preferred shares—weighted average		93,213,683		—		—
Share options and restricted shares —weighted average		9,041,434		1,673,342		2,902,950

Related party transactions (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of Relationship Between Related Parties with their Groups

Related Party		Relationship with the Group
Zhuhai Qianyou		Equity investment of the Group
Hao Cheng		Co-founder and shareholder of the Group
Chuan Wang		Director of the Company
Shenglong Zou		Co-founder and shareholder of the Group
Beijing Millet Technology Co., Ltd. (“Beijing Xiaomi”)		Company owned by a shareholder of the Group
Leading Advice Holdings Limited		Company owned by a Co-founder and shareholder of the Group
Vantage Point Global Limited		Shareholder of the Company
Aiden & Jasmine Limited		Shareholder of the Company
Kingsoft Corporation Limited		Shareholder of the Company
King Venture Holdings Limited		Principal shareholder of the Group (shareholding >=10%)
Xiaomi Venture Limited		Principal shareholder of the Group
Morningside Technology Investments Limited		Principal shareholder of the Group
Shenzhen Xunlei Big Data Information Service Co., Ltd.		Equity investment of the Group
Shenzhen Xunlei Finance Information Service Co., Ltd.		Subsidiary of the Group’s equity investment
Shenzhen Crystal Technology Co., Ltd.		Company owned by a Co-founder and director of the Group
Millet Communication Technology Co., Ltd. (“Millet Communication Technology”)		Company owned by a shareholder of the Group
Beijing Millet Electronic Products Co., Ltd.		Company owned by a shareholder of the Group
Beijing Millet Digital Technology Co., Ltd.		Company owned by a shareholder of the Group
Millet Technology Co., Ltd.		Company owned by a shareholder of the Group
Beijing Millet Payment Technology Co., Ltd.		Company owned by a shareholder of the Group

Schedule of Significant Related Party Transactions

	Years ended December 31,
(In thousands)	2014		2015		2016
Game sharing costs paid and payable to Zhuhai Qianyou (note a)		402		127		154
Repayment from Hao Cheng		85		—		—
Bandwidth revenue from Millet Technology Co., Ltd.		—		—		316
Technology service revenue from Beijing Xiaomi		303		344		1,010
Bandwidth revenue from Millet Communication Technology Co., Ltd. (note b)		—		—		2,483
Marketing expense to Millet Communication Technology Co., Ltd.		—		—		20
Advertisement revenue from Beijing Xiaomi		871		—		—
Advance to Shenglong Zou		10		—		—
Advance to Chuan Wang		7		—		—
Accrued to Aiden & Jasmine Limited (note c)		1,125		54		54
Accrued to Vantage Point Global Limited (note c)		3,012		146		146

Schedule of Amount Due to from Related Party

	December 31,		December 31,		December 31,
(In thousands)	2014		2015		2016
Amounts due to related parties
Accounts payable to Zhuhai Qianyou		84		38		45
Long-term payable to Aiden & Jasmine Limited		1,125		1,179		1,233
Long-term payable to Vantage Point Global Limited		3,012		3,158		3,304

	December 31,		December 31,		December 31,
(In thousands)	2014		2015		2016
Amounts due from related parties
Accounts receivable from Beijing Xiaomi		5		30		95
Accounts receivable from Millet Communication Technology Co., Ltd.		—		—		939
Accounts receivable from Beijing Millet Payment Technologies Limited		—		—		38
Accounts receivable from Shenzhen Xunlei Finance Information Service Co., Ltd.		—		—		5
Other receivable from Shenzhen Crystal Technology Co., Ltd.		—		—		6
Other receivable from Shenglong Zou		10		9		9
Other receivable from Chuan Wang		7		6		5

Taxation (Tables)

12 Months Ended

Dec. 31, 2016

Taxation [Abstract]

Schedule of Current and Deferred Portions of Income Tax Expense

Continuing operations	Years ended December 31,
(In thousands)	2014		2015		2016
Current income tax expenses		397		289		71
Deferred income tax benefits		66		(1,175)		(1,335)
Taxation for the year		463		(886)		(1,264)

Summary of Aggregate Amount and Per Share Effect of Tax Holiday

	Years ended December 31,
	2014		2015		2016
Aggregate dollar effect (in thousands)		2,784		(830)		(1,430)
Per share effect—basic		0.01		0.00		0.00
Per share effect—diluted		0.01		0.00		0.00

Reconciliation of Total Tax Expense (Benefit)

Continuing operations	Years ended December 31,
(In thousands)	2014		2015		2016
Income tax expense/(benefit) at PRC statutory rate (based on statutory tax rate applicable to enterprises in Shenzhen, China)		7,211		(438)		(6,310)
Effects of differences in tax rates in different jurisdictions applicable to entities of the Group outside of the PRC		(838)		2,400		2,145
Non-deductible expenses		714		14		12
Effect of Super Deduction available to Shenzhen Xunlei		(1,365)		-		(901)
Effect of tax holiday		(4,613)		(369)		1,430
Change in valuation allowance of deferred tax assets		291		4,750		6,396
Effect on deferred tax assets due to change in tax rates		(103)		(8)		-
Outside basis difference arising from VIE and its subsidiaries in the PRC		478		(2,174)		(5,743)
Expiration of tax loss		51		290		90
Others		(1,363)		(5,351)		1,617
Income tax expense/ (benefit)		463		(886)		(1,264)

Summary of Changes in Deferred Tax Asset and Liability Balances

	December 31,		December 31,
(In thousands)	2015		2016
Deferred tax assets, current portion:
Net operating loss carried forward (Note a)		417		1,276
Amortization of intangible assets arising from intragroup transactions (Note b)		95		51
Impairment of online game licenses		23		—
Impairment of long-term equity investment		115		—
Allowance for advance to suppliers		120		—
Valuation allowance		(81)		(106)
Deferred tax assets, current portion, net		689		1,221
Deferred tax assets, non-current portion:

Net operating loss carried forward(Note a)		13,016		12,093
Amortization of intangible assets arising from intragroup transactions (Note b)		54		—
Impairment of long-term equity investment		—		348
Allowance for advance to suppliers		—		576
Valuation allowance		(4,477)		(9,745)
Deferred tax assets, non-current portion, net		8,593		3,272

Deferred tax liabilities, non-current portion:
Outside basis difference (Note c)		(6,378)		(635)

Summary of Net Operating Tax Loss Carryforwards

(In thousands)
2017			775
2018			5,795
2019			3,414
2020			559
2021 and thereafter			6,820
			17,363

Schedule of Movement of Valuation Allowance

	Years ended December 31,
(In thousands)	2014		2015		2016
Beginning balance		—		(291)		(4,559)
Additions		(291)		(4,268)		(5,292)
Write-off		—		—		—
Ending balance		(291)		(4,559)		(9,851)

Fair value measurements (Tables)

12 Months Ended

Dec. 31, 2016

Fair value measurements [Abstract]

Schedule of Financial Instruments Measured at Fair Value

	Fair value measurements as at December 31, 2015
			Quoted prices		Significant
			in active market		other		Significant
			for identical assets		observable inputs		observable inputs
(In thousands)	Total		(Level 1)		(Level 2)		(Level 3)
Cash equivalent: time deposits with original maturities less than three months		314,357		—		314,357		—
Short term investments:
Investments in financial instruments		70,328		—		70,328		—
		384,685		—		384,685		—

	Fair value measurements as at December 31, 2016
			Quoted prices		Significant
			in active market		other		Significant
			for identical assets		observable inputs		observable inputs
(In thousands)	Total		(Level 1)		(Level 2)		(Level 3)
Cash equivalent: time deposits with original maturities less than three months		115,944		—		115,944		—
Short term investments:
Investments in financial instruments		143,131		—		143,131		—
		259,075		—		259,075		—

Certain risks and concentration (Tables)

12 Months Ended

Dec. 31, 2016

Certain risks and concentration [Abstract]

Schedule of Consolidated Financial Information of VIEs and VIE's Subsidiaries

	As of December 31,
(In thousands)	2015		2016
Current assets:
Cash and cash equivalents		32,461		40,393
Short-term investments		69,522		28,749
Accounts receivable, net		11,573		14,824
Due from related parties		30		1,083
Deferred tax assets		351		971
Inventories		480		374
Prepayments and other current assets		31,659		15,123
Total current assets		146,076		101,517
Non-current assets:
Equity method investments		9,884		25,479
Deferred tax assets		6,791		1,849
Property and equipment, net		17,991		20,059
Construction in progress		14		574
Intangible assets, net		14,297		11,083
Goodwill		21,896		20,497
Other long-term prepayments		7,430		1,187
Total non-current assets		78,303		80,728
Total assets		224,379		182,245
Current liabilities:
Accounts payable (note a)		33,262		44,162
Due to a related party		38		45
Deferred revenue and income, current portion		24,902		24,260
Income tax payable		2,407		2,253
Accrued liabilities and other payables (note b)		131,312		104,114
Total current liabilities		191,921		174,834
Non-current liabilities:
Deferred revenue and income, non-current portion		4,751		3,539
Total non-current liabilities		4,751		3,539
Total liabilities		196,672		178,373

Note a.

The balance included inter-companies balances with the Company and its subsidiaries of USD 11,626 thousand and USD 9,360 thousand as of December 31, 2015 and 2016, respectively.

Note b.

The balance included inter-companies balances with the Company and its subsidiaries of USD 105,872 thousand and USD 91,477 thousand as of December 31, 2015 and 2016, respectively.

	Years ended December 31,
(In thousands)	2014		2015		2016
Net revenue from continuing operations		132,515		129,198		156,192
Net income / (loss) attributable to Xunlei Limited		12,677		(6,408)		(32,402)

	Years ended December 31,
(In thousands)	2014		2015		2016
Net cash provided by operating activities		70,822		41,723		3,565
Net cash (used in)/provided by investing activities		(78,335)		(51,721)		1,859
Net cash provided by financing activities		856		1,055		2,508
		(6,657)		(8,943)		7,932

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

Kingsoft acquisition in 2014 (Tables)

12 Months Ended

Dec. 31, 2016

Business Combinations [Abstract]

The allocation of the purchase price at the date of acquisition is as follows:

(In thousands)
Property and equipment			255
Intangible assets
—Trademarks			6,120
—Technology (including right-to-use)			2,381
—Non-compete agreement			1,490
Goodwill			23,057
			33,303

Additional information: condensed financial statements of the Company (Tables)

12 Months Ended

Dec. 31, 2016

Additional information: condensed financial statements of the Company [Abstract]

Schedule of Condensed Balance Sheets

Condensed balance sheets

	December 31,		December 31,
(In thousands)	2015		2016
Assets
Current assets:
Cash and cash equivalents		292,175		273,160
Due from subsidiaries and consolidated VIEs		92,864		101,130
Prepayments and other current assets		1,090		348
Total current assets		386,129		374,638
Non-current assets:
Property, equipment and software, net		—		3
Investments in subsidiaries and consolidated VIEs		68,481		43,447
Total assets		454,610		418,088
Liabilities
Current liabilities:
Accounts payable		55		55
Due to subsidiaries and consolidated VIEs		388		1,862
Deferred revenue and income, current portion		211		272
Accrued liabilities and other payables		1,393		1,695
Total current liabilities		2,047		3,884
Non-current liabilities:
Deferred revenue and income, non-current		632		543
Due to related parties, non-current portion		4,337		4,537
Other long-term payable		845		886
Total liabilities		7,861		9,850
Commitments and contingencies
Shareholders’ equity
Common shares		85		83
Treasury shares 29,558,094 shares as at December 31, 2015 and 38,332,209 shares as at December 31, 2016		7		9
Other shareholders’ equity		446,657		408,146
Total Xunlei Limited’s shareholders’ equity		446,749		408,238
Total liabilities and shareholders’ equity		454,610		418,088

Schedule of Condensed Statements of Operations

Condensed statements of operations

	Years ended December 31,
(In thousands)	2014		2015		2016
Revenues	—		—		—
Cost of revenues		(1,673)		(131)		—
Gross loss		(1,673)		(131)		—
Operating expenses
Research and development expenses		—		—
Sales and marketing expenses		—		—		(10)
General and administrative expenses		(996)		(1,314)		(1,193)
Total operating expenses		(996)		(1,314)		(1,203)
Operating loss		(2,669)		(1,445)		(1,203)
Interest income		6,171		5,318		1,521
Interest expense		(163)		(239)		(239)
Other income, net		7,602		(3,261)		715
Loss from subsidiaries and consolidated VIEs		(129)		(13,540)		(24,905)
Income / (loss) before income tax		10,812		(13,167)		(24,111)
Income tax		—		—		—
Net income / (loss)		10,812		(13,167)		(24,111)
Net income attributable to the non-controlling interest		—		—		—
Net income / (loss) attributable to Xunlei Limited’s common shareholders		10,812		(13,167)		(24,111)

Schedule of Condensed Statement of Cash Flows

Condensed statement of cash flows

	Years ended December 31,
(In thousands)	2014		2015		2016
Cash flows from operating activities
Net cash used in operating activities		(41,485)		(26,069)		(20,312)
Cash flows from investing activities
Net cash (used in) / generated from investing activities		(10,333)		3,812		15,557
Cash flows from financing activities
Net cash generated from / (used in) financing activities		332,412		4,975		(14,260)
Net increase / (decrease) in cash and cash equivalents		280,594		(17,282)		(19,015)
Cash and cash equivalents at beginning of year		28,863		309,457		292,175
Effect of exchange rates on cash and cash equivalents		—		—		—
Cash and cash equivalents at end of year		309,457		292,175		273,160

Organization and Nature of Operations - Additional Information (Detail) ¥ / shares in Units, $ in Thousands, ¥ in Millions		1 Months Ended		12 Months Ended
	Jun. 24, 2014 USD ($) shares	Nov. 30, 2014 shares	May 31, 2011 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥) ¥ / shares	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Variable Interest Entity [Line Items]
Date of incorporation				Feb. 03, 2005	Feb. 03, 2005
Number of year's power of attorney retained				10 years	10 years
Percentage of pre-tax operating profit				80.00%	80.00%
Service fees payable \| $				$ 1,088		$ 1,235	$ 1,228
Number of securities issued \| shares		10,000,000
Net proceeds received from IPO \| $							$ 93,881
American Depository Shares (ADSs) [Member]
Variable Interest Entity [Line Items]
Date of completion of IPO				Jun. 24, 2014	Jun. 24, 2014
Number of securities issued \| shares	8,412,250
Number of shares equivalent to each ADS	5
Net proceeds received from IPO \| $	$ 89,665
Exclusive Technology Support and Services Agreement [Member]
Variable Interest Entity [Line Items]
Percentage of pre-tax operating profit				20.00%	20.00%
Exclusive Technology Consulting and Training Agreement [Member]
Variable Interest Entity [Line Items]
Percentage of pre-tax operating profit				20.00%	20.00%
Software and Proprietary Technology License Contract [Member]
Variable Interest Entity [Line Items]
Percentage of pre-tax operating profit				40.00%	40.00%
Giganology (Shenzhen) Co. Ltd [Member]
Variable Interest Entity [Line Items]
Date of incorporation				Jun. 30, 2005	Jun. 30, 2005
Termination of agreement, notice period				30 days	30 days
Automated extended period of agreement				10 years	10 years
Agreement expiration date				2022	2022
Giganology (Shenzhen) Co. Ltd [Member] \| Exclusive Technology Support and Services Agreement [Member]
Variable Interest Entity [Line Items]
Term agreement expiration year				2025	2025
Giganology (Shenzhen) Co. Ltd [Member] \| Exclusive Technology Consulting and Training Agreement [Member]
Variable Interest Entity [Line Items]
Term agreement expiration year				2025	2025
Shenzhen Xunlei and Xunlei Computer [Member]
Variable Interest Entity [Line Items]
License agreement, term				2 years	2 years
Agreement between Giganology Shenzhen and Mr. Sean Shenglong Zou [Member]
Variable Interest Entity [Line Items]
Agreement term years				2 years	2 years
Loan agreements description				The term of this agreement last for two years from the date it was signed, and will be automatically extended afterwards on a yearly basis until Mr. Zou has repaid the loan in its entirety in accordance with the loan agreement	The term of this agreement last for two years from the date it was signed, and will be automatically extended afterwards on a yearly basis until Mr. Zou has repaid the loan in its entirety in accordance with the loan agreement
Additional interest-free loans					¥ 20
Increase in registered capital					30
Agreement between Giganology Shenzhen and Shareholders of Shenzhen Xunlei [Member]
Variable Interest Entity [Line Items]
Interest-free loans					¥ 9
Agreement term years				2 years	2 years
Loan agreements description				The term of these agreements last for two years from the date it was signed, and will be automatically extended afterwards on a yearly basis until each shareholder of Shenzhen Xunlei has repaid the loans in its entirety in accordance with the loan agreement	The term of these agreements last for two years from the date it was signed, and will be automatically extended afterwards on a yearly basis until each shareholder of Shenzhen Xunlei has repaid the loans in its entirety in accordance with the loan agreement
Agreement between Giganology Shenzhen and Shenzhen Xunlei [Member]
Variable Interest Entity [Line Items]
Increase in registered capital			¥ 20
Term agreement expiration year				2016	2016
Call Option Agreement [Member] \| Giganology (Shenzhen) Co. Ltd [Member]
Variable Interest Entity [Line Items]
Agreement expiration date				2022	2022
Outstanding share, purchase price per share \| ¥ / shares					¥ 1

Organization and Nature of Operations - Accompanying Consolidated Financial Statements Include Financial Statements of Company, Subsidiaries, Variable Interest Entity ("VIE") and VIE's Subsidiaries (Detail)	12 Months Ended
	Dec. 31, 2016
Variable Interest Entity [Line Items]
Date of incorporation	Feb. 03, 2005
Shenzhen Xunlei Networking Technologies, Co., Ltd [Member]
Variable Interest Entity [Line Items]
Place of incorporation	China
Date of incorporation	Jan. 31, 2003
Relationship	VIE
Percentage of direct or indirect economic ownership	100.00%
Principal activities	Development of software, provision of online and related advertising, membership subscription and online game services; as well as sales of software licenses
Giganology (Shenzhen) Co. Ltd [Member]
Variable Interest Entity [Line Items]
Place of incorporation	China
Date of incorporation	Jun. 30, 2005
Relationship	Subsidiary
Percentage of direct or indirect economic ownership	100.00%
Principal activities	Development of computer software and provision of information technology services to related companies
Shenzhen Xunlei Wangwenhua Co Ltd [Member]
Variable Interest Entity [Line Items]
Place of incorporation	China
Date of incorporation	Dec. 31, 2005
Relationship	VIEs subsidiary
Percentage of direct or indirect economic ownership	100.00%
Principal activities	Development of software for related companies
Xunlei Networking Technologies Beijing Co Ld [Member]
Variable Interest Entity [Line Items]
Place of incorporation	China
Date of incorporation	Jun. 30, 2009
Relationship	VIEs subsidiary
Percentage of direct or indirect economic ownership	100.00%
Principal activities	Development of software for related companies
Xunlei Zhuolian Software Co Ltd [Member]
Variable Interest Entity [Line Items]
Place of incorporation	China
Date of incorporation	Jan. 31, 2010
Relationship	VIEs subsidiary
Percentage of direct or indirect economic ownership	100.00%
Principal activities	Provision of software technology development for related companies
Xunlei Games Development (Shenzhen) Co., Ltd. [Member]
Variable Interest Entity [Line Items]
Place of incorporation	China
Date of incorporation	Feb. 28, 2010
Relationship	VIE’s subsidiary
Percentage of direct or indirect economic ownership	70.00%
Principal activities	Development of online game and computer software for related companies and provision of advertising services
Xunlei Network Technologies Limited BVI [Member]
Variable Interest Entity [Line Items]
Place of incorporation	British Virgin Islands
Date of incorporation	Feb. 28, 2011
Relationship	Subsidiary
Percentage of direct or indirect economic ownership	100.00%
Principal activities	Holding company
Xunlei Network Technologies Limited HK [Member]
Variable Interest Entity [Line Items]
Place of incorporation	Hong Kong
Date of incorporation	Mar. 31, 2011
Relationship	Subsidiary
Percentage of direct or indirect economic ownership	100.00%
Principal activities	Development computer software of related companies and provision of advertising services
Xunlei Computer (Shenzhen) Co., Ltd. [Member]
Variable Interest Entity [Line Items]
Place of incorporation	China
Date of incorporation	Nov. 30, 2011
Relationship	Subsidiary
Percentage of direct or indirect economic ownership	100.00%
Principal activities	Development of computer software and provision of information technology services to related companies
Shenzhen Onething Technologies Co Ltd [Member]
Variable Interest Entity [Line Items]
Place of incorporation	China
Date of incorporation	Sep. 30, 2013
Relationship	VIEs subsidiary
Percentage of direct or indirect economic ownership	100.00%
Principal activities	Development of computer software and provision of information technology services to related companies
Beijing Xunjing Technologies Co Ltd [Member]
Variable Interest Entity [Line Items]
Place of incorporation	China
Date of incorporation	Oct. 31, 2015
Relationship	VIEs subsidiary
Percentage of direct or indirect economic ownership	100.00%
Principal activities	Development of computer software and provision of information technology services
Shenzhen Crystal Interactive Technologies Co [Member]
Variable Interest Entity [Line Items]
Place of incorporation	China
Date of incorporation	May 31, 2016
Relationship	VIEs subsidiary
Percentage of direct or indirect economic ownership	100.00%
Principal activities	Development of computer software and provision of information technology services
Shenzhen Xunlei Venture Capital Partnership Enterprise [Member]
Variable Interest Entity [Line Items]
Place of incorporation	China
Date of incorporation	Jun. 30, 2016
Relationship	VIEs subsidiary
Percentage of direct or indirect economic ownership	99.00%
Principal activities	Investments in industries and consultation in investments
Shenzhen Xunlei Kankan Information Technologies Co., Ltd. [Member]
Variable Interest Entity [Line Items]
Place of incorporation	China
Date of incorporation	Aug. 31, 2008
Relationship	VIEs subsidiary
Percentage of direct or indirect economic ownership	100.00%
Principal activities	Development of software for related companies (note a)

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies and General Information [Line Items]
Allowance for doubtful accounts	$ 119	$ 126	$ 131
Impairment of long-term investments	$ 1,660	800
Fair value of a reporting unit less than carrying amount, including goodwill	50.00%
Goodwill impairment losses	$ 0
Sales rebates provided to the agencies and advertisers	15	1,179	5,005
Content sub-licensing revenue from discontinued operations		2,929	9,218
Net gains from barter transactions		137	1,556
Net proceeds from barter transactions		409	4,428
Barter transaction cost		247	2,606
Business tax and surcharge on barter transactions		25	266
External advertising and market promotion expenses from continuing operations	10,008	8,089	5,978
Capitalization of software development costs
Interest and penalties net of tax recognized	$ 0	0	0
Value added tax on revenues	17.00%
Value added tax on sub-licensing revenues	6.00%
Employee benefit costs	$ 9,237	$ 5,481	$ 3,818
Statutory general reserve rate	10.00%
Statutory general reserve rate of registered capital	50.00%
Dividends declared	$ 0	$ 0	$ 0
Fair Value Inputs, Discount Rate	18.20%
Minimum [Member]
Accounting Policies and General Information [Line Items]
Amortization percentage of intangible assets	70.00%
Maximum [Member]
Accounting Policies and General Information [Line Items]
Amortization percentage of intangible assets	90.00%
Fair Value Discounted Cash Flow, Estimated Annual Growth Rate	2.00%
Online game licenses [Member]
Accounting Policies and General Information [Line Items]
Other intangible assets, amortization period	3 years
Impairment of intangible assets	$ 721	$ 770	$ 808
Acquired computer software [Member]
Accounting Policies and General Information [Line Items]
Other intangible assets, amortization period	5 years
Internal use software development costs [Member]
Accounting Policies and General Information [Line Items]
Other intangible assets, amortization period	5 years
Domain name [Member]
Accounting Policies and General Information [Line Items]
Other intangible assets, amortization period	5 years
Land use right [Member]
Accounting Policies and General Information [Line Items]
Other intangible assets, amortization period	30 years

Summary of Significant Accounting Policies - Schedule of Property and Equipment Estimated Useful Life (Detail)	12 Months Ended
	Dec. 31, 2016
Servers and network equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Residual rate	5.00%
Computer equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Residual rate	5.00%
Furniture, fittings and office equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Residual rate	5.00%
Motor vehicles [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Residual rate	5.00%
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	shorter of lease term or 3 years
Estimated useful lives	3 years

Summary of Significant Accounting Policies - Analysis of Different Types of Revenues (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Revenue from continuing operations

Subscription revenue

$ 90,163

$ 82,435

$ 98,189

Advertising revenue

16,874

4,802

5,834

Other internet value-added services

^[1]

49,929

42,759

31,789

Total

$ 156,966

$ 129,996

$ 135,812

[1]

Summary of Significant Accounting Policies - Schedule of Balances of Registered Capital, Additional Paid-in-Capital and Statutory Reserves (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies and General Information [Line Items]
Additional paid-in capital	$ 453,347	$ 458,270
Statutory reserves	5,132	5,132
China [Member]
Accounting Policies and General Information [Line Items]
Paid-in capital	118,733	112,435
Additional paid-in capital	161	161
Statutory reserves	5,132	5,132
Total	$ 124,026	$ 117,728

Discontinued operations (Narrative) (Details) ¥ in Thousands, $ in Thousands	Jul. 15, 2015 USD ($)	Jul. 31, 2015 USD ($)	Jul. 31, 2015 CNY (¥)
Discontinued operations [Line Items]
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	$ 1,505
Xunlei Kankan [Member]
Discontinued operations [Line Items]
Sales price		$ 21,183	¥ 130,000

Discontinued operations (Schedule of Discontinued Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Results of the discontinued operation
Income taxes benefits/(expenses)	$ 36	$ (2,048)	$ 1,923
Xunlei Kankan [Member]
Results of the discontinued operation
Revenues, net of rebates and discounts		15,677	47,075
Business taxes and surcharges		(447)	(1,480)
Net revenues		15,230	45,595
Cost of revenues		(13,240)	(42,704)
Gross profit		1,990	2,891
Research and development expenses	5	(3,245)	(6,035)
Sales and marketing expenses	(27)	(7,384)	(15,726)
General and administrative expenses	(221)	(3,051)	(3,016)
Total operating expenses	(243)	(13,680)	(24,777)
Net gain from exchanges of content copyrights		137	1,556
Operating loss	(243)	(11,553)	(20,330)
Gain on disposal of Kankan		1,505
Income taxes benefits/(expenses)	36	(2,048)	1,923
Loss from discontinued operations	(207)	(12,096)	(18,407)
Assets
Accounts receivable, net			23,741
Prepayments and other current assets			670
Copyrights related to content-current portion			16,013
Property and equipment, net			1,111
Intangible assets			4,997
Prepayment for content			456
Other long-term prepayments and receivables			57
Total assets held for sale			47,045
Current liabilities
Accounts payables			25,267
Deferred revenue, current portion			1,018
Accrued liabilities and other payables			1,082
Total liabilities held for sale			27,367
Cash flows generated from/ (used in) discontinued operations
Net cash generated from/(used in) operating activities	(215)	(1,554)	2,293
Net cash (used in)/generated from investing activities		9,135	(34,661)
Net cash used in financing activities
Net cash flow for the year	$ (215)	$ 7,581	$ (32,368)

Cash and Cash Equivalents - Summary of Cash on Hand and Cash Held at Bank (Detail) ¥ in Thousands, HKD in Thousands, $ in Thousands	Dec. 31, 2016 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 HKD	Dec. 31, 2015 CNY (¥)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 HKD	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Cash and Cash Equivalents [Line Items]
Cash on hand and cash held at bank		$ 199,504			$ 361,777		$ 404,275	$ 93,906
RMB [Member]
Cash and Cash Equivalents [Line Items]
Cash on hand and cash held at bank	¥ 538,660	77,651		¥ 606,845	93,454
USD [Member]
Cash and Cash Equivalents [Line Items]
Cash on hand and cash held at bank		121,726			268,198
HKD [Member]
Cash and Cash Equivalents [Line Items]
Cash on hand and cash held at bank		$ 127	HKD 987		$ 125	HKD 969

Cash and Cash Equivalents - Summary of Time Deposits (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2016 USD ($)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2015 USD ($)
Cash and Cash Equivalents [Line Items]
Time deposits	$ 115,944		$ 314,357
RMB [Member]
Cash and Cash Equivalents [Line Items]
Time deposits		¥ 349,099	53,760
USD [Member]
Cash and Cash Equivalents [Line Items]
Time deposits	$ 115,944		$ 260,597

Short-Term Investments - Schedule of Short-Term Investments (Detail) - USD ($)
$ in Thousands

Dec. 31, 2016

Dec. 31, 2015

Schedule of Investments [Line Items]

Schedule of Investments [Line Items]

$ 181,960

$ 70,328

Time deposits [Member]

Investments in financial instruments [Member]

38,829

Schedule of Investments [Line Items]

Interest-free loans to employees

^[1]

$ 143,131

$ 70,328

[1]	the investments were issued by commercial banks in PRC with a variable interest rate indexed to performance of underlying assets. Since these investments’ maturity dates are within one year, they are classified as short-term investments.

Accounts Receivable, Net - Schedule of Accounts Receivable (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets held for sale
Accounts receivable	$ 14,655	$ 11,392
Less: Allowance for doubtful accounts	(119)	(126)	$ (131)
Accounts receivable, net	$ 14,536	$ 11,266

Accounts Receivable, Net - Schedule of Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the year	$ 126	$ 131
Additions		4	523
Write-off			(393)
Exchange difference	(7)	(9)	1
Balance at end of the year	$ 119	$ 126	$ 131

Accounts Receivable, Net - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) Customer	Dec. 31, 2015 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable reserved \| $	$ 0.1	$ 0.1
Number of top customers \| Customer	10
Credit concentration risk [Member] \| Accounts receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, percentage	76.00%	39.00%

Prepayments and other assets - Schedule of Prepayments and Other Assets (Detail) - USD ($)
$ in Thousands

Dec. 31, 2016

Jan. 31, 2016

Dec. 31, 2015

Current portion:

Advance to suppliers

$ 2,392

$ 882

^[1]

3,964

3,200

Advance to employees for business purposes

351

957

Interest receivable

210

564

Rental and other deposits

1,014

224

Prepayment for share repurchase plan

^[2]

$ 700

712

^[2]

Prepaid management insurance

145

209

Receivable from Nesound

^[3]

3,748

4,004

Prepayment for taxation

1,392

2,041

Others

377

275

Total of prepayments and other current assets

13,593

13,068

Non-current portion:

Long term receivable

1,812

Low-interest loans to employees, non-current portion

^[4]

697

833

Total of long-term prepayments and other assets

1,187

7,431

Online game licenses [Member]

Non-current portion:

Prepayments for intangible assets

$ 490

$ 4,786

[1]	The Group had entered into loan contracts with certain employees as at December 31, 2015 and 2016, under which the Group provided interest-free loans to these employees. The loan amounts vary amongst different employees and are repayable on demand.
[2]	As of December 31, 2015, the prepayment for share repurchase plan represented prepayment made to a securities broker for a share repurchase program up to USD 20 million announced in December 2014. In January 2016, the Company announced another share repurchase program to purchase up to USD 20 million shares and prepaid USD 0.7 million to a securities broker. As of December 31, 2016, all the prepayment has been utilized.
[3]	The Group sold Kankan to Nesound in July 2015. As at December 31, 2016, there is a balance receivable amounted to USD 3,748 thousand which was past due. The Group have brought the claim against Nesound to the arbitration tribunal and considered that the balances can be collected in full.
[4]	The Group had entered into loan contracts with certain employees as at December 31, 2015 and 2016, under which the Group provided low-interest loans to these employees. The loan amounts vary amongst different employees and are repayable in equal instalments on a monthly basis over the term of 10 years.

Prepayments and other assets - Schedule of Prepayments and Other Assets (Parenthetical) (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2016

Jan. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Low-interest employee loan repayable period

10 years

Share repurchase program amount

$ 20,000

Prepaid amount to security broker

^[1]

$ 700

$ 712

^[1]

Stock Repurchase Program, Prepayment to Broker

$ 20,000

[1]

As of December 31, 2015, the prepayment for share repurchase plan represented prepayment made to a securities broker for a share repurchase program up to USD 20 million announced in December 2014. In January 2016, the Company announced another share repurchase program to purchase up to USD 20 million shares and prepaid USD 0.7 million to a securities broker. As of December 31, 2016, all the prepayment has been utilized.

Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	$ 48,117	$ 42,556
Less: Accumulated depreciation	(27,675)	(24,534)
Sub-total	20,442	18,022
Construction in progress	574	14
Total	21,016	18,036
Servers and network equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	42,641	37,332
Computer equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	1,538	1,544
Furniture, fittings and office equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	845	856
Motor vehicles [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	299	320
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	$ 2,794	$ 2,504

Property and Equipment - Summary of Depreciation Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 6,165	$ 5,646	$ 6,500
Cost of Revenue [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	5,848	5,003	5,652
General and administrative expenses [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	306	628	715
Sales and marketing expenses [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	5	7	123
Research and Development Expense [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 6	$ 8	$ 10

Intangible assets, net - Schedule of Intangible Assets (Detail) - USD ($)
$ in Thousands

Dec. 31, 2016

Dec. 31, 2015

$ 20,648

$ 21,732

(9,181)

(7,529)

(721)

(770)

10,746

13,433

Land use right [Member]

4,796

5,123

(543)

(409)

4,253

4,714

Trademarks [Member]

5,441

5,812

(1,814)

(1,107)

Non-compete agreement [Member]

3,627

4,705

1,325

1,415

(773)

(472)

Technology (including right-to-use) [Member]

552

943

2,117

2,261

(617)

(377)

Acquired computer software [Member]

1,500

1,884

884

619

(420)

(255)

Internal use software development costs [Member]

464

364

631

675

(631)

(641)

Online game licenses [Member]

^[1]

5,454

5,827

^[1]

(4,383)

(4,268)

^[1]

(721)

(770)

^[1]

$ 350

$ 789

[1]	As of December 31, 2015 and 2016, full provision for impairment has been provided for an online game license due to significant under-performance in the past.

Intangible assets, net - Schedule of Amortization Expense Recognized (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 2,223	$ 2,668	$ 2,055
Cost of Revenues [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	403	693	1,141
General and administrative expenses [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	323	386	372
Research and development expenses [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 1,497	$ 1,589

Intangible assets, net - Schedule of Estimated Aggregate Amortization Expense (Detail) $ in Thousands	Dec. 31, 2016 USD ($)
Finite-Lived Intangible Assets [Line Items]
2017	$ 2,057
2018	1,623
2019	1,251
2020	1,233
2021 and thereafter	$ 4,582

Intangible assets, net - Schedule of Weighted Average Amortization Periods of Intangible Assets (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization periods of intangible assets	11 years	11 years
Land use right [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization periods of intangible assets	30 years	30 years
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization periods of intangible assets	7 years	7 years
Non-compete agreement [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization periods of intangible assets	4 years	4 years
Technology (including right-to-use) [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization periods of intangible assets	8 years	8 years
Acquired computer software [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization periods of intangible assets	5 years	5 years
Internal use software development costs [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization periods of intangible assets	5 years	5 years
Online game licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization periods of intangible assets	3 years	3 years

Inventories (Details) - USD ($)
$ in Thousands

Dec. 31, 2016

Dec. 31, 2015

$ 374

$ 480

ZQB [Member]

^[1]

XZB [Member]

Online Shopping Mall Inventories [Member]

^[2]

152

^[3]

153

Others [Member]

$ 144

$ 159

[1]	ZQB, a proprietary hardware connected to users’ network routers, can allocate users’ idle uplink capacity to the Company for further allocation to internet content providers.
[2]	XZB is a personal cloud hardware, which can remotely control downloading through mobile phones or computers, to expand storage of terminals unlimitedly and share data in cloud storage.
[3]	online shopping mall inventories include Xiaomi TV box, gaming discs etc.

Long-term investments - Schedule of Long-Term Investments (Detail)
$ in Thousands, ¥ in Millions

12 Months Ended

Dec. 31, 2016

USD ($)

Dec. 31, 2015

USD ($)

Dec. 31, 2015

CNY (¥)

Dec. 31, 2014

USD ($)

Balance at beginning of the year

$ 2,162

$ 2,965

Additions

^[1]

1,442

Disposal

^[2]

(701)

Share of loss from equity investees

(195)

(12)

$ (259)

Dilution gains arising from deemed disposal of investments

689

^[3]

702

^[3]

449

Transfer to cost method investments

(786)

(1,349)

Exchange differences

(132)

(144)

Balance at end of the year

1,790

2,162

2,965

Balance at beginning of the year

9,157

2,533

Additions

^[1],[4]

32,707

6,506

Disposal

^[2]

(2,220)

Dilution gains arising from deemed disposal of investment

^[2],[3]

689

Transfer from equity method investments

786

1,349

Exchange difference

(463)

(429)

Less: impairment loss on long-term investments

(1,654)

(802)

¥ (5)

Balance at end of the year

39,002

9,157

$ 2,533

Total long-term investments

$ 40,792

$ 11,319

[1]	In 2016, the Group made an equity investment in a privately-held company, Big Data, of USD 1,442 thousand for 43.16% equity interest. The Group classified Big Data as an equity method investment as it had only significant influence instead of control over Big Data. In 2016, the Group also made equity investments in seven unrelated privately-held companies for aggregate consideration of USD 28,242 thousand. The shares held by the Group are not in-substance common stock and therefore the Group accounted for these investments according to ASC 320 as equity activities using the cost method. In addition, the Group increased its investment in Cloudtropy from 1.13% to 9.69% equity interest at a consideration of USD 3,780 thousand. The Group also participated in a new round of financing of Xiamen Diensi to the extent of USD 700 thousand while the Group’s equity interest in Xiamen Diensi diluted from 15% to 14.25% by other investors.
[2]	In January 2016, the Group disposed of 9% interest in Guangzhou Yuechuan with a carrying value of USD 701 thousand at a consideration of approximately USD 1.3 million. As a result of the disposal, the Group’s interest in Guangzhou Yuechuan decreased from 19.13% to 10.13% and transferred this investment from equity method to cost method as the Group no longer has significant influence over this investee. At the same time, Guangzhou Yuechuan also issued certain new shares to a third party and the Group’s interest in Guangzhou Yuechuan diluted from 10.13% to 9.3% with a dilution gain of USD 69 thousand arising from the deemed disposal. In addition, the Group also disposed of its entire interest in Nanjing Qianyi with a carrying value of USD2.16 million and RenJianRenAi with a carrying value of USD58 thousand (after an impairment of USD230 thousand made during 2016 against its carrying value). These disposals resulted in a disposal gain of USD 626 thousand recognized in the other income, net (note 25).
[3]	In May 2014, the Group obtained the right to appoint a director to Chengdu Diting and thus had one out of five seats on the board of directors of this investee. Given the existence of significant influence, the Group started to apply equity method in May 2014 although the Group's ownership interest in Chengdu Diting decreased from 19.9% to 16.58% because Chengdu Diting issued new shares to a third party for a total consideration of RMB 10 million (USD 1,627 thousand). In April of 2015, the new investor of Chengdu Diting injected capital of RMB 39.07 million (USD 6.39 million). As a result of the transaction, the Group 's ownership interest in Chengdu Diting was diluted from 16.58% to 13.27%. So the recognition of Chengdu Diting's ownership for the Group transferred from equity method to cost method. The Group recorded a dilution gain of RMB 4.38 million (USD 702 thousand) arising from the sale of shares by the investee to third parties at a price in excess of the per share carrying value of the shares owned by the Group in 2015.
[4]	In 2015, the Group made equity investments in five more unrelated privately-held companies. The shares held by the Group are not in-substance common stock and therefore the Group accounted for these investments according to ASC 320 as equity activities using the cost method. In August 2015, the Group increased investment of USD 39 thousand to purchase 25 thousand shares of Shenzhen Kushiduo. As a result, the Group's ownership interest in Shenzhen Kushiduo increased from 10% to 12.5%.

Long-term investments - Schedule of Equity Investments, Percentage of Ownership of Common Share (Detail)

Dec. 31, 2016

Dec. 31, 2015

Zhuhai Qianyou [Member]

Equity method investments, Percentage of ownership of common share

19.00%

Guangzhou Yuechuan [Member]

Equity method investments, Percentage of ownership of common share

^[1]

10.13%

19.13%

Cost method investments, Percentage of ownership of common share

^[1]

9.30%

10.13%

Chengdu Diting [Member]

Equity method investments, Percentage of ownership of common share

^[2]

12.74%

13.27%

Cost method investments, Percentage of ownership of common share

13.27%

16.58%

Shenzhen Kushiduo [Member]

Cost method investments, Percentage of ownership of common share

^[2],[3]

10.00%

12.50%

Shanghai Guozhi [Member]

Cost method investments, Percentage of ownership of common share

16.80%

21.00%

Guangzhou Wucai [Member]

Cost method investments, Percentage of ownership of common share

^[4]

10.00%

Guangzhou Hongsi [Member]

Cost method investments, Percentage of ownership of common share

19.90%

Tianjin Kunzhiyi [Member]

Cost method investments, Percentage of ownership of common share

^[2]

19.99%

Suzhou Heidisi [Member]

Cost method investments, Percentage of ownership of common share

^[3],[4]

19.90%

Xiamen Diensi [Member]

Cost method investments, Percentage of ownership of common share

^[2],[3],[5]

14.25%

15.00%

Nanjing Qianyi [Member]

Cost method investments, Percentage of ownership of common share

^[1],[3]

20.00%

11.2 Capital [Member]

Cost method investments, Percentage of ownership of common share

^[3]

2.05%

2.24%

Cloudtropy [Member]

Cost method investments, Percentage of ownership of common share

^[3],[5]

9.69%

1.13%

Shenzhen Xunlei [Member]

Equity method investments, Percentage of ownership of common share

^[5]

43.16%

Shanghai Lexiang [Member]

Cost method investments, Percentage of ownership of common share

^[5]

15.00%

Hangzhou Feixiang [Member]

Cost method investments, Percentage of ownership of common share

^[5]

20.00%

Shenzhen Meizhi Interactive Technology Co Ltd [Member]

Cost method investments, Percentage of ownership of common share

^[2],[5]

8.13%

Beijing Yunhui [Member]

Cost method investments, Percentage of ownership of common share

^[5]

7.50%

Arashi Vision [Member]

Cost method investments, Percentage of ownership of common share

^[5]

11.46%

Cloudin Technology [Member]

Cost method investments, Percentage of ownership of common share

^[5]

4.47%

Shenzhen RenJian RenAi Networking Technology Co Ltd [Member]

Cost method investments, Percentage of ownership of common share

[1]	In January 2016, the Group disposed of 9% interest in Guangzhou Yuechuan with a carrying value of USD 701 thousand at a consideration of approximately USD 1.3 million. As a result of the disposal, the Group’s interest in Guangzhou Yuechuan decreased from 19.13% to 10.13% and transferred this investment from equity method to cost method as the Group no longer has significant influence over this investee. At the same time, Guangzhou Yuechuan also issued certain new shares to a third party and the Group’s interest in Guangzhou Yuechuan diluted from 10.13% to 9.3% with a dilution gain of USD 69 thousand arising from the deemed disposal. In addition, the Group also disposed of its entire interest in Nanjing Qianyi with a carrying value of USD2.16 million and RenJianRenAi with a carrying value of USD58 thousand (after an impairment of USD230 thousand made during 2016 against its carrying value). These disposals resulted in a disposal gain of USD 626 thousand recognized in the other income, net (note 25).
[2]	In May 2014, the Group obtained the right to appoint a director to Chengdu Diting and thus had one out of five seats on the board of directors of this investee. Given the existence of significant influence, the Group started to apply equity method in May 2014 although the Group's ownership interest in Chengdu Diting decreased from 19.9% to 16.58% because Chengdu Diting issued new shares to a third party for a total consideration of RMB 10 million (USD 1,627 thousand). In April of 2015, the new investor of Chengdu Diting injected capital of RMB 39.07 million (USD 6.39 million). As a result of the transaction, the Group 's ownership interest in Chengdu Diting was diluted from 16.58% to 13.27%. So the recognition of Chengdu Diting's ownership for the Group transferred from equity method to cost method. The Group recorded a dilution gain of RMB 4.38 million (USD 702 thousand) arising from the sale of shares by the investee to third parties at a price in excess of the per share carrying value of the shares owned by the Group in 2015.
[3]	In 2015, the Group made equity investments in five more unrelated privately-held companies. The shares held by the Group are not in-substance common stock and therefore the Group accounted for these investments according to ASC 320 as equity activities using the cost method. In August 2015, the Group increased investment of USD 39 thousand to purchase 25 thousand shares of Shenzhen Kushiduo. As a result, the Group's ownership interest in Shenzhen Kushiduo increased from 10% to 12.5%.
[4]	In September of 2015, Tianjin Kunzhiyi suffered from financial difficulties and lost most of its core R&D staff. As a result, new games couldn't be promoted as committed in investment agreement with the Group. The Group recognized impairment of RMB 5 million (USD 802 thousand) for its interest in Tianjin Kunzhiyi as considered necessary. In 2016, in addition to impairment of RenJian RenAi (note 11 (iii)), the Group also recognized impairment against its investments in Guangzhou Wucai, Suzhou Heidisi, and Shanghai Guozhi of USD 301 thousand, USD 597 thousand and USD 526 thousand, respectively after considering the latest operation status and financial and liquidity position.
[5]	In 2016, the Group made an equity investment in a privately-held company, Big Data, of USD 1,442 thousand for 43.16% equity interest. The Group classified Big Data as an equity method investment as it had only significant influence instead of control over Big Data. In 2016, the Group also made equity investments in seven unrelated privately-held companies for aggregate consideration of USD 28,242 thousand. The shares held by the Group are not in-substance common stock and therefore the Group accounted for these investments according to ASC 320 as equity activities using the cost method. In addition, the Group increased its investment in Cloudtropy from 1.13% to 9.69% equity interest at a consideration of USD 3,780 thousand. The Group also participated in a new round of financing of Xiamen Diensi to the extent of USD 700 thousand while the Group’s equity interest in Xiamen Diensi diluted from 15% to 14.25% by other investors.

Long-term investments - Schedule of Equity Investments, Percentage of Ownership of Common Share (Parenthetical) (Detail)
¥ in Thousands, shares in Thousands, $ in Thousands

1 Months Ended

12 Months Ended

Aug. 31, 2015

USD ($)

Apr. 30, 2015

USD ($)

Apr. 30, 2015

CNY (¥)

May 31, 2014

USD ($)

May 31, 2014

CNY (¥)

Dec. 31, 2016

USD ($)

Dec. 31, 2016

CNY (¥)

Dec. 31, 2015

USD ($)

Dec. 31, 2015

CNY (¥)

Dec. 31, 2014

USD ($)

Schedule of Equity Method Investments [Line Items]

Number of equity investments

Diluted gain arising from sale of shares

$ 689

^[1]

$ 702

^[1]

$ 449

Disposal Of Cost Method Investments

^[2]

(2,220)

Cost-method Investments, Other than Temporary Impairment

^[1],[2]

689

1,654

802

¥ 5,000

Equity Method Investments

1,790

2,162

2,965

Cost Method Investments Additions

^[3],[4]

32,707

6,506

Payments to Acquire Equity Method Investments

28,242

Other Long-term Investments [Member]

Schedule of Equity Method Investments [Line Items]

Investment Income, Interest and Dividend

626

Guangzhou Yuechuan [Member]

Schedule of Equity Method Investments [Line Items]

Consideration received by equity method investee

$ 1,300

Equity method investments, Percentage of ownership of common share

^[2]

10.13%

19.13%

Diluted gain arising from sale of shares

$ 69

$ 701

Equity Method Investment, Decrease In Ownership Percentage

^[2]

9.30%

10.13%

9.00%

Chengdu Diting [Member]

Schedule of Equity Method Investments [Line Items]

Consideration received by equity method investee

$ 1,627

¥ 10,000

Equity method investments, Percentage of ownership of common share

^[1]

12.74%

13.27%

Diluted gain arising from sale of shares

$ 702

¥ 4,380

$ 6,390

¥ 39,070

Number of board of directors seats of investee to be appointed by Group

13.27%

16.58%

Number of board of directors seats of investee

Shenzhen Kushiduo [Member]

$ 248

Schedule of Equity Method Investments [Line Items]

Number of shares acquired of cost method investee | shares

$ 39

Nanjing Qianyi Video Information Technology Co Ltd [Member]

^[1],[3]

10.00%

12.50%

Schedule of Equity Method Investments [Line Items]

Disposal Of Cost Method Investments

^[2],[3]

20.00%

$ 2,160

Shenzhen RenJian RenAi Networking Technology Co Ltd [Member]

Schedule of Equity Method Investments [Line Items]

Cost-method Investments, Other than Temporary Impairment

$ 230

Xiamen Diensi Network Technology Company Limited [Member]

Schedule of Equity Method Investments [Line Items]

^[1],[3],[4]

14.25%

15.00%

Schedule of Equity Method Investments [Line Items]

$ 100

Guangzhou Wucai [Member]

Cost-method Investments, Other than Temporary Impairment

^[5]

10.00%

$ 301

Suzhou Heidisi Network Technology Company Ltd [Member]

Schedule of Equity Method Investments [Line Items]

Cost-method Investments, Other than Temporary Impairment

^[3],[5]

19.90%

$ 597

Shanghai Guozhi [Member]

Schedule of Equity Method Investments [Line Items]

Cost-method Investments, Other than Temporary Impairment

16.80%

21.00%

$ 526

Shenzhen Xunlei Big Data Information Service Co., Ltd. [Member]

Schedule of Equity Method Investments [Line Items]

Equity method investments, Percentage of ownership of common share

43.16%

Payments to Acquire Equity Method Investments

$ 1,442

Cloudtropy [Member]

Schedule of Equity Method Investments [Line Items]

Cost Method Investments Additions

^[3],[4]

9.69%

1.13%

$ 3,780

Xiamen Diensi Technology Co., Ltd [Member]

Schedule of Equity Method Investments [Line Items]

Equity method investments, Percentage of ownership of common share

14.25%

15.00%

Equity Method Investments

$ 700

Meizhi Interactive [Member]

Schedule of Equity Method Investments [Line Items]

Schedule of Equity Method Investments [Line Items]

Kushiduo [Member]

Schedule of Equity Method Investments [Line Items]

188

RenJianRenAi [Member]

$ 58

[1]	In May 2014, the Group obtained the right to appoint a director to Chengdu Diting and thus had one out of five seats on the board of directors of this investee. Given the existence of significant influence, the Group started to apply equity method in May 2014 although the Group's ownership interest in Chengdu Diting decreased from 19.9% to 16.58% because Chengdu Diting issued new shares to a third party for a total consideration of RMB 10 million (USD 1,627 thousand). In April of 2015, the new investor of Chengdu Diting injected capital of RMB 39.07 million (USD 6.39 million). As a result of the transaction, the Group 's ownership interest in Chengdu Diting was diluted from 16.58% to 13.27%. So the recognition of Chengdu Diting's ownership for the Group transferred from equity method to cost method. The Group recorded a dilution gain of RMB 4.38 million (USD 702 thousand) arising from the sale of shares by the investee to third parties at a price in excess of the per share carrying value of the shares owned by the Group in 2015.
[2]	In January 2016, the Group disposed of 9% interest in Guangzhou Yuechuan with a carrying value of USD 701 thousand at a consideration of approximately USD 1.3 million. As a result of the disposal, the Group’s interest in Guangzhou Yuechuan decreased from 19.13% to 10.13% and transferred this investment from equity method to cost method as the Group no longer has significant influence over this investee. At the same time, Guangzhou Yuechuan also issued certain new shares to a third party and the Group’s interest in Guangzhou Yuechuan diluted from 10.13% to 9.3% with a dilution gain of USD 69 thousand arising from the deemed disposal. In addition, the Group also disposed of its entire interest in Nanjing Qianyi with a carrying value of USD2.16 million and RenJianRenAi with a carrying value of USD58 thousand (after an impairment of USD230 thousand made during 2016 against its carrying value). These disposals resulted in a disposal gain of USD 626 thousand recognized in the other income, net (note 25).
[3]	In 2015, the Group made equity investments in five more unrelated privately-held companies. The shares held by the Group are not in-substance common stock and therefore the Group accounted for these investments according to ASC 320 as equity activities using the cost method. In August 2015, the Group increased investment of USD 39 thousand to purchase 25 thousand shares of Shenzhen Kushiduo. As a result, the Group's ownership interest in Shenzhen Kushiduo increased from 10% to 12.5%.
[4]	In 2016, the Group made an equity investment in a privately-held company, Big Data, of USD 1,442 thousand for 43.16% equity interest. The Group classified Big Data as an equity method investment as it had only significant influence instead of control over Big Data. In 2016, the Group also made equity investments in seven unrelated privately-held companies for aggregate consideration of USD 28,242 thousand. The shares held by the Group are not in-substance common stock and therefore the Group accounted for these investments according to ASC 320 as equity activities using the cost method. In addition, the Group increased its investment in Cloudtropy from 1.13% to 9.69% equity interest at a consideration of USD 3,780 thousand. The Group also participated in a new round of financing of Xiamen Diensi to the extent of USD 700 thousand while the Group’s equity interest in Xiamen Diensi diluted from 15% to 14.25% by other investors.
[5]	In September of 2015, Tianjin Kunzhiyi suffered from financial difficulties and lost most of its core R&D staff. As a result, new games couldn't be promoted as committed in investment agreement with the Group. The Group recognized impairment of RMB 5 million (USD 802 thousand) for its interest in Tianjin Kunzhiyi as considered necessary. In 2016, in addition to impairment of RenJian RenAi (note 11 (iii)), the Group also recognized impairment against its investments in Guangzhou Wucai, Suzhou Heidisi, and Shanghai Guozhi of USD 301 thousand, USD 597 thousand and USD 526 thousand, respectively after considering the latest operation status and financial and liquidity position.

Deferred revenue and income - Schedule of Deferred Revenue and Income (Detail) - USD ($)
$ in Thousands

Dec. 31, 2016

Dec. 31, 2015

$ 28,614

$ 30,496

^[1]

(4,082)

(5,383)

Membership subscription revenues [Member]

24,532

25,113

22,115

24,502

Online game revenues [Member]

(820)

(719)

Government grants [Member]

1,490

^[2]

1,120

^[3]

4,195

4,032

Reimbursement from the depository [Member]

(2,719)

(4,032)

^[4]

814

842

$ (543)

$ (632)

[1]	As of December 31, 2016, the non-current portion included membership subscription revenue of USD 820 thousand (2015: USD719 th0usand), government grants of USD2,719 thousand (2015: USD4,032 thousand), and reimbursement from the depositary of USD543 thousand (2015: USD632 thousand).
[2]	The estimated lives of the user relationship extended, as result of change in accounting estimate of the lives of online game. Accordingly, the portion recognized as deferred revenue of online game increased.
[3]	In March and June of 2016, the Group received government grant of USD 2.5 million. This government grant was recognized as deferred income and amortized in 5 years under the property, plant and equipment depreciation policy.
[4]	In August 2016, the Company received from its depositary bank a reimbursement of USD 0.27 million, net of withholding tax of USD 0.6 million. This reimbursement was recognized as deferred income and amortized over the depositary service period of 5 years.

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

Deferred revenue and income - Schedule of Deferred Revenue and Income (Parenthetical) (Detail) - USD ($)
$ in Thousands

1 Months Ended

4 Months Ended

12 Months Ended

Aug. 31, 2016

Jun. 30, 2016

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Reimbursement received from depository

$ 270

$ 1,158

Deferred income withholding tax

$ 600

Deferred income amortized depositary service period

5 years

Increase Decrease In Deferred Government Grants

^[1]

4,082

5,383

$ 2,500

(3,473)

(1,969)

$ (2,059)

Deferred Income Amortization Period For Government Grant

5 years

Membership subscription revenues [Member]

Government grants [Member]

820

719

Reimbursement from the depository [Member]

2,719

4,032

Agency commissions and rebates—online advertising

$ 543

$ 632

[1]	As of December 31, 2016, the non-current portion included membership subscription revenue of USD 820 thousand (2015: USD719 th0usand), government grants of USD2,719 thousand (2015: USD4,032 thousand), and reimbursement from the depositary of USD543 thousand (2015: USD632 thousand).

Accrued liabilities and other payables - Schedule of Accrued Liabilities and Other Payables (Detail) - USD ($)
$ in Thousands

Dec. 31, 2016

Dec. 31, 2015

Payroll and welfare

$ 11,322

$ 10,570

2,297

2,443

Payables for advertisement on exclusive online games

1,521

1,643

Receipts in advance from customers

^[1]

5,538

Tax levies

1,864

1,605

Payables for purchase of equipment

3,235

4,999

Legal and litigation related expenses

2,904

2,601

Professional fees

1,007

908

Staff reimbursements

452

611

Rental expense

Payables for proceeds from selling exercised stock options

352

177

Payables for gaming distribution

147

158

Payables to Nesound

807

622

Others

1,680

1,038

Total

$ 33,131

$ 27,379

[1]	Receipts in advance from customers represents prepayment from a customer in respect of CDN and advertisements services.

Cost of revenues - Schedule of Cost of Revenues (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

$ 80,319

$ 60,034

$ 55,755

Bandwidth costs [Member]

Content costs, including amortization [Member]

55,135

37,218

33,545

Payment handling fees [Member]

692

338

Depreciation of servers and other equipment [Member]

6,967

9,087

11,305

Games revenue sharing costs and others [Member]

5,848

4,873

5,102

^[1]

$ 11,677

$ 8,518

$ 5,803

[1]	gaming revenue sharing costs and others mainly include gaming sharing costs, cost of ZQB and cost of live video.

Redeemable Convertible Preferred Shares - Series D Convertible Redeemable Preferred Shares - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands

1 Months Ended

12 Months Ended

Jan. 31, 2012

Dec. 31, 2016

Feb. 06, 2014

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Jun. 24, 2014

Apr. 30, 2014

Mar. 31, 2014

Mar. 05, 2014

Mar. 01, 2014

Total consideration from issuance of Series D preferred shares and warrants

$ 37,500

Loss on exchange of warrants

$ (405)

Retained earnings

$ (36,704)

(36,704)

$ (12,593)

Fair value of gain recognized in other income

$ 2,922

Initial Public Offering [Member]

Equity Method Investment, Ownership Percentage

80.00%

Minimum [Member]

55.36%

Maximum [Member]

Series D Preferred Stock [Member]

59.91%

Warrants to purchase preferred shares

1,952,663

266,272

Warrants to purchase preferred per shares

$ 3.38

Conversion, description

Loss on exchange of warrants

8,391,850

Fair value of warrants

$ 2,414

$ 405

Initial conversion price

$ 3.5

Adjusted conversion price

$ 2.86

Preferred Stock, Shares Outstanding

6,771,454

Remaining shares held by investor

3,808,943

Beneficial conversion feature for preferred shares anti-diluted

$ 4,008

Number of shares redeemed under rights

6,771,454

Retained earnings

$ 279

Series D Preferred Stock [Member] | Initial Public Offering [Member]

Adjusted conversion price

10,581,726

Initial conversion price

$ 2.86

2.27

Preferred Stock, Shares Outstanding

6,771,454

Series D Preferred Stock [Member] | Minimum [Member]

Series D Preferred Stock [Member] | Maximum [Member]

38.39%

Series D Warrants [Member]

43.40%

Warrants, exercisable period description

Initial fair value of warrants

$ 3,007

Fair value of warrants

$ 2,186

Fair value of (loss)/gain of warrants

$ 1,531

$ 710

Series E Preferred Shares [Member]

^[1],[2]

0.00%

Warrants to purchase preferred shares

3,406,824

Warrants to purchase preferred per shares

$ 2.82

Initial fair value of warrants

129,166,667

$ 2,819

Initial conversion price

2.82

Adjusted conversion price

$ 2.4

Remaining shares held by investor

110,014,440

Convertible Redeemable Preferred Shares [Member]

Equity Method Investment, Ownership Percentage

10.00%

Convertible Redeemable Preferred Shares [Member] | Series D Preferred Stock [Member]

Preferred stock, price per share

Preferred stock, issued

10,580,397

$ 3.544

Warrants to purchase preferred shares

2,218,935

Warrants to purchase preferred per shares

$ 3.38

Number of shares issued from existing shareholders to third-party investors

5,036,367

Preferred shares, redemption rights

The Series D preferred shares were redeemable at any time after the 4th anniversary of the initial closing of February 6, 2012 to request the Company to purchase all Series D preferred shares and shares issuable upon the conversion or exercise of the Series D warrants if an initial public offering is not consummated. This redemption right expires after the 5th anniversary of the initial closing of the transaction. The redemption price shall be equal to the aggregate amount of price paid at USD3.544, plus all declared but unpaid dividends up to the date of redemption plus interest of 8% per annum compounded annually from the closing of the Series D preferred shares investment(Initial Closing) up to and including the date of redemption.

Preferred shares redemption price per share, minimum

$ 3.544

Compound interest rate per annum on unpaid dividends

8.00%

Preferred shares, carrying value

$ 32,481

Capitalized expense

$ 2,012

Convertible Redeemable Preferred Shares [Member] | Series E Preferred Shares [Member]

Conversion, description

Series E Warrants [Member]

[1]	Given that the maturity date of Series D warrant was February 6, 2014, the volatility rate and risk-free interest rate did not affect the valuation of the warrant on February 6, 2014.
[2]	Volatility – based on the average historical volatility of the comparable companies from Bloomberg as at the valuation date.

Redeemable Convertible Preferred Shares - Assumptions to Estimated Fair Value of Warrants (Detail) - $ / shares

1 Months Ended

12 Months Ended

Apr. 24, 2014

Mar. 05, 2014

Feb. 06, 2014

Dec. 31, 2016

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]

Series D Warrants [Member]

^[1]

0.00%

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]

^[2]

$ 4.47

^[3],[4]

0.00%

^[3],[5]

0.00%

Convertible Redeemable Preferred Shares [Member] | Series E Warrants [Member]

^[1]

0.00%

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]

^[4]

0.12%

Subscription Rights [Member]

^[5]

38.81%

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]

^[4]

0.02%

0.04%

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]

^[5]

42.74%

38.12%

Minimum [Member]

Minimum [Member] | Series E Warrants [Member]

55.36%

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]

^[2]

$ 3.31

^[4]

0.04%

^[5]

38.39%

Minimum [Member] | Convertible Redeemable Preferred Shares [Member] | Series E Warrants [Member]

^[1]

0.00%

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]

Minimum [Member] | Subscription Rights [Member]

^[6]

$ 4.50

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]

^[6]

$ 3.39

$ 3.31

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]

^[1]

0.00%

Maximum [Member]

Maximum [Member] | Series E Warrants [Member]

59.91%

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]

$ 4.65

^[4]

0.12%

Maximum [Member] | Convertible Redeemable Preferred Shares [Member] | Series E Warrants [Member]

^[5]

38.81%

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]

Maximum [Member] | Subscription Rights [Member]

^[6]

$ 4.65

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]

^[6]

$ 4.64

$ 4.65

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

0.00%

^[1]

[1]	The Company has no history or expectation of paying dividends on its common shares.
[2]	Spot price – based on the fair value of 100 percent equity interest of the Company which was allocated to preferred shares and common shares of the Company as at the valuation date under different scenarios. For the valuation on March 5, 2014 and March 31, 2014, the probability of the occurrence of an IPO is assumed to be 80%, the probability of the occurrence of a liquidation event is assumed to be 10% and the probability of the occurrence of a redemption event is assumed to be 10%.
[3]	Given that the maturity date of Series D warrant was February 6, 2014, the volatility rate and risk-free interest rate did not affect the valuation of the warrant on February 6, 2014.
[4]	Risk-free interest rate – based on the US Treasury Bond & Notes BFV curve from Bloomberg as at the valuation date.
[5]	Volatility – based on the average historical volatility of the comparable companies from Bloomberg as at the valuation date.
[6]	Spot price – based on the fair value of 100 percent equity interest of the Company which is allocated to preferred shares and common shares of the Company as at the valuation date under different scenarios. The probability of the occurrence of an IPO is assumed to be 80%, the probability of the occurrence of a liquidation event is assumed to be 10% and the probability of the occurrence of a redemption event is assumed to be 10%.

Redeemable Convertible Preferred Shares - Assumptions to Estimated Fair Value of Warrants - (Parenthetical) (Detail)	Apr. 24, 2014	Mar. 05, 2014
Subscription Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event	100.00%
Series E Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event		100.00%
Initial Public Offering [Member] \| Subscription Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event	80.00%
Initial Public Offering [Member] \| Series E Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event		80.00%
Liquidation Event [Member] \| Subscription Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event	10.00%
Liquidation Event [Member] \| Series E Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event		10.00%
Redemption Event [Member] \| Subscription Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event	10.00%
Redemption Event [Member] \| Series E Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event		10.00%

Redeemable Convertible Preferred Shares - Summary of Redeemable Convertible Preferred Shares (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Temporary Equity [Line Items]
Repurchase of preferred shares	$ (14,319)	$ (1,287)	$ (59,082)
Converted to common shares upon IPO
Initial Public Offering [Member]
Temporary Equity [Line Items]
Converted to common shares upon IPO			470,759
Series E Tranche 1 Preferred Shares [Member]
Temporary Equity [Line Items]
BCF upon Series E	52,377
Series D Preferred Stock [Member]
Temporary Equity [Line Items]
Accretion of Series D to convertible redeemable preferred shares redemption value			1,870
Accretion of Series E to convertible redeemable preferred shares redemption value			(1,870)
Convertible Redeemable Preferred Shares [Member] \| Series E Tranche 1 Preferred Shares [Member]
Temporary Equity [Line Items]
Beginning balance
Addition			275,314
Exercise of Series E subsequent sale rights			28,568
BCF upon Series E			(53,486)
Amortisation of BCF of Series E			4,139
Accretion of Series E to convertible redeemable preferred shares redemption value			12,754
Acceleration of amortization of BCF of Series E upon IPO			49,346
Converted to common shares upon IPO			(344,031)
Ending balance
Convertible Redeemable Preferred Shares [Member] \| Series E Tranche 1 Preferred Shares [Member] \| Initial Public Offering [Member]
Temporary Equity [Line Items]
Deemed dividend to preferred shareholders upon IPO			27,396
Convertible Redeemable Preferred Shares [Member] \| Series D Preferred Stock [Member]
Temporary Equity [Line Items]
Beginning balance			40,290	35,990
Deemed dividend to preferred shareholders upon IPO			279
Accretion of Series D to convertible redeemable preferred shares redemption value			1,870	4,300
Repurchase of preferred shares			(15,003)
Ending balance				40,290
Convertible Redeemable Preferred Shares [Member] \| Series D Preferred Stock [Member] \| Initial Public Offering [Member]
Temporary Equity [Line Items]
Deemed dividend to preferred shareholders upon IPO			4,008
Converted to common shares upon IPO			$ (31,444)

Redeemable Convertible Preferred Shares - Series E Convertible Redeemable Preferred Shares - Additional Information (Detail) $ / shares in Units, $ in Thousands				3 Months Ended	12 Months Ended
	Jun. 24, 2014 USD ($) $ / shares shares	Apr. 24, 2014 USD ($) shares	Mar. 05, 2014 USD ($) $ / shares shares	Jun. 04, 2014 $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Aug. 31, 2013 USD ($)
Conversion of Stock [Line Items]
Fair value of warrant liability							$ (8,054)
First Two Investors [Member]
Conversion of Stock [Line Items]
Total consideration		$ 100,000
Third Investor [Member]
Conversion of Stock [Line Items]
Total consideration		10,000
Unvested restricted stock [Member]
Conversion of Stock [Line Items]
Number of shares imposed transfer restrictions \| shares					3,394,564
Unvested options [Member]
Conversion of Stock [Line Items]
Number of shares imposed transfer restrictions \| shares					180,000
Vested options [Member]
Conversion of Stock [Line Items]
Number of shares imposed transfer restrictions \| shares					180,000
Common shares [Member]
Conversion of Stock [Line Items]
Shares subscribed \| shares					39,934,162
Subscription Rights [Member]
Conversion of Stock [Line Items]
Initial fair value of subscription rights		28,208
Fair value of subscription rights		$ 29,223
Series E Tranche 1 Investor [Member]
Conversion of Stock [Line Items]
Warrants to purchase preferred shares \| shares			17,743,873
Warrants exercise price \| $ / shares			$ 2.82
Series E Tranche 1 Investor [Member] \| Subscription Rights [Member]
Conversion of Stock [Line Items]
Shares subscribed \| shares				35,487,746
Series E Preferred Shares [Member]
Conversion of Stock [Line Items]
Total consideration from issuance of Series E preferred shares and warrants			$ 20,000
Preferred stock, shares issued \| shares			70,975,491
Preferred stock issued price \| $ / shares			$ 2.82
Warrants to purchase preferred shares \| shares			3,406,824
Warrants exercise price \| $ / shares			$ 2.82
Percentage of issue price					100.00%
Converted into common share \| shares					129,166,667
Interest rate for delayed period					15.00%
Initial conversion price \| $ / shares	$ 2.82
Adjusted conversion price \| $ / shares	$ 2.4
Initial fair value of warrants					$ 2,819
Fair value of warrant liability	$ 6,381
Beneficial conversion feature					27,396
Shares held by investors \| shares	110,014,440
Unamortized beneficial conversion feature for preferred shares anti-diluted					$ 49,346
Series E Preferred Shares [Member] \| Subscription Rights [Member]
Conversion of Stock [Line Items]
Right to purchase additional number of preferred shares by investor \| shares					35,487,746
Series E Tranche 1 Preferred Shares [Member]
Conversion of Stock [Line Items]
Amount of beneficial conversion feature					$ 52,377
Common stock fair value per share \| $ / shares					$ 3.05
Initial conversion price \| $ / shares					2.82
Adjusted conversion price \| $ / shares					$ 2.31
Series E Tranche 1 Investor Options [Member]
Conversion of Stock [Line Items]
Valuation based on subscription price			$ 30,000,000		$ 10,000,000			$ 10,000,000
Percentage of approval for transfer of preferred shares					75.00%
Valuation of transfer restriction					$ 43,300
Percentage increase in valuation					200.00%
Series E Warrants [Member]
Conversion of Stock [Line Items]
Initial fair value of warrants					$ 6,477
Preferred stock, price per share repurchased \| $ / shares				$ 2.82
Series E Tranche 2 Investor [Member]
Conversion of Stock [Line Items]
Number of investors		2
Number of investors exercised the Subscription Rights		3
Series E Tranche 2 Preferred Shares [Member]
Conversion of Stock [Line Items]
Shares subscribed \| shares		39,037,382
Total consideration		$ 110
Fair value of warrant liability		29,223
Series E Tranche 2 Preferred Shares [Member] \| First Two Investors [Member]
Conversion of Stock [Line Items]
Total consideration		100,000
Beneficial conversion feature		1,109
Series E Tranche 2 Preferred Shares [Member] \| Third Investor [Member]
Conversion of Stock [Line Items]
Total consideration		$ 10,000

Convertible Preferred Shares - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2014	Dec. 31, 2016	Dec. 31, 2012	Dec. 31, 2015	Jun. 24, 2014	Apr. 30, 2014	Mar. 31, 2014	Jan. 31, 2014	Jan. 31, 2012	Apr. 30, 2011
Conversion of Stock [Line Items]
Threshold removed, amount										$ 50,000
Additional paid-in-capital		$ 453,347		$ 458,270
Common shares issued	10,000,000
Conversion after anti-dilution		$ 5.13
Minimum [Member]
Conversion of Stock [Line Items]
Volatility rate		55.36%
Maximum [Member]
Conversion of Stock [Line Items]
Volatility rate		59.91%
Series A [Member]
Conversion of Stock [Line Items]
Beneficial conversion feature for preferred shares		$ 54
Series C [Member]
Conversion of Stock [Line Items]
Beneficial conversion feature for preferred shares anti-diluted			$ 286
Initial conversion price									$ 5.24
Adjusted conversion price									4.14
Preferred shares at purchase price per common share									$ 4.607
Purchase option exercise period		12 months
Conversion , description		Upon issuance of Series D preferred shares in January 2012 as discussed in note 15, the Company adjusted the Series C conversion price from USD5.24 to USD4.14 per share; and obtained an exclusive option to purchase at any time within 12 months after the date of the conversion for all, but not less than all, of Series C preferred shares at the purchase price of USD4.607 per common share.
Converted into common share		7,248,293
Preferred shares outstanding		5,728,264
Additional paid-in-capital		$ 2,905
Common shares issued		96,024,567
Series C [Member] \| Anti-dilution clause 1 [Member]
Conversion of Stock [Line Items]
Beneficial conversion feature for preferred shares anti-diluted		$ 58
Conversion , description		Upon issuance of Series E preferred shares in March and April 2014, the Company adjusted the Series C conversion price from USD4.14 to USD3.64 and from USD3.64 to USD3.63 per share relating to 114,565 Series C preferred shares held by one investor (‘‘Series C Investor 2''), respectively. The Company concluded that the downward conversion price adjustment is in accordance with the anti-dilution clause in the original Series C financing agreement.
Converted into common share		5,728,264
Preferred shares outstanding		114,565
Series C [Member] \| Anti-dilution clause 2 [Member]
Conversion of Stock [Line Items]
Beneficial conversion feature for preferred shares anti-diluted		$ 1,403
Conversion , description		Upon the completion of the IPO on 24 June 2014, the Company adjusted the Series C conversion price from USD4.14 to USD3.89 and from USD3.63 to USD3.45 per share relating to 5,613,699 Series C preferred shares held by Series C Investor 1 and 114,565 Series C preferred shares held by Series C Investor 2, respectively. The Company concluded that the downward conversion price adjustment is in accordance with the anti-dilution clause in the latest shareholders agreement.
Converted into common share		7,724,419
Preferred shares outstanding		114,565
Series C [Member] \| Series C Investor 1 [Member]
Conversion of Stock [Line Items]
Initial conversion price					$ 4.14			$ 4.14
Adjusted conversion price					$ 3.89
Conversion after anti-dilution								$ 2.81
Shares held by investors					5,613,699			5,613,699
Series C [Member] \| Series C Investor 2 [Member]
Conversion of Stock [Line Items]
Initial conversion price					$ 3.63	$ 3.64	$ 4.14
Adjusted conversion price					$ 3.45	$ 3.63	$ 3.64
Shares held by investors					114,565	114,565	114,565

Common shares - Additional Information (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, par value	$ 0.00025	$ 0.00025
Common stock, shares outstanding	330,545,000	339,319,115
Common stock voting rights, description	Each common share is entitled to one vote. The holders of common shares are also entitled to receive dividends whenever funds are legally available and when declared by the Board of Directors, which is subject to the approval by the holders of the common shares representing a majority of the aggregate voting power of all outstanding shares.

Repurchase of shares - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended										12 Months Ended
	Apr. 14, 2016	Dec. 31, 2016	Dec. 30, 2016	Nov. 30, 2016	Oct. 27, 2016	Sep. 30, 2016	Aug. 30, 2016	Jul. 29, 2016	Jun. 30, 2016	May 31, 2016	Mar. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Equity, Class of Treasury Stock [Line Items]
Total Number of ADS Purchased												2,454,500
Approximate Dollar Value of ADSs that May Yet Be Purchased Under the Plan		$ 5,700										$ 5,700
Share repurchase program amount														$ 20,000
Payments for Repurchase of Preferred Stock and Preference Stock												14,319	$ 1,287	$ 69,303
Share Repurchase Program, 2016 [Member]
Equity, Class of Treasury Stock [Line Items]
Total Number of ADS Purchased	457,900	2,454,500	173,312	21,229	31,400	15,467	229,695	555,357	111,459	449,696	408,985
Average Price Paid Per Share	$ 6.61		$ 4.02	$ 4.61	$ 5.11	$ 5.33	$ 5.83	$ 5.33	$ 5.24	$ 6.28	$ 6.22
Share repurchase program amount		$ 20,000										$ 20,000

Non-controlling interest - Additional Information (Detail) - Xunlei Games Development (Shenzhen) Co., Ltd. [Member] ¥ in Thousands, $ in Thousands	Feb. 28, 2010 USD ($)	Feb. 28, 2010 CNY (¥)
Noncontrolling Interest [Line Items]
Percentage of equity interest owned by parent	70.00%	70.00%
Minority interest owned by shareholder, percent	30.00%	30.00%
Minority interest owned by shareholder, amount	$ 439	¥ 3,000

Share-based compensation - Additional Information (Detail) - USD ($) $ in Thousands				1 Months Ended			12 Months Ended
	Dec. 01, 2014	Sep. 05, 2014	Jun. 11, 2014	Nov. 30, 2014	Apr. 30, 2014	Nov. 30, 2013	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares expected to vest							1,440,923	1,008,645	9,642,307
Incremental share-based compensation to be recognized	$ 2,214
Share options cancelled	3,776,711						0	80,000
Common shares issued				10,000,000
Total fair value, share options vested							$ 6,831	$ 6,297
Unrecognized share-based compensation costs							$ 1,358	$ 1,147
Weighted-average vesting period expected to be recognized							3 years 2 months 12 days	4 years 11 days
Leading Advice Holdings Limited [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares issued					14,195,412	9,073,732
Restricted shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted	1,505,787
Kingsoft Cloud Storage Business [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Replacement award attributable to pre-combination service		$ 303
Business acquisition date							Sep. 05, 2014
Replacement award attributable to post-combination service		$ 44
2010 share incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period, description							Stock options granted to employees and officers vest over a four-year schedule as stated below: (1) One-fourth of the options shall be vested upon the first anniversary of the grant date; (2) The remaining three quarters of the options shall be vested on monthly basis over the next thirty-six months. ( 1/48 of options shall be vested per month subsequently)
Number of shares available for grant							4,677,465
Extended maturity date of share options							Jun. 11, 2015
Lock-up period for shares from IPO closing date							6 months
Incremental share-based compensation to be recognized			$ 768
2010 share incentive plan [Member] \| Employee and officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period							4 years
2010 share incentive plan [Member] \| Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period							32 months
2010 share incentive plan [Member] \| Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated forfeiture rate							20.00%
2010 share incentive plan [Member] \| Restricted shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted								80,000
Restricted stock granted							1,170,000
2010 share incentive plan [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option term							7 years
Stock option vesting period	2 years
2010 share incentive plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option term							10 years
Stock option vesting period	4 years 6 months
Number of shares available for grant										26,822,828
2013 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted							8,664,980	7,987,435
2013 Plan [Member] \| Restricted shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant							9,073,732
Restricted stock granted									4,233,558
2013 Plan [Member] \| Restricted shares [Member] \| Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares expected to vest							5,098,345
Stock option vesting period							4 years
Stock option vesting period, description							one-fourth of the restricted shares shall be vested upon the first, second, third, and fourth anniversary of the grant date, respectively.
2013 Plan [Member] \| Restricted shares [Member] \| Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares expected to vest							1,102,430
Stock option vesting period							5 years
Stock option vesting period, description							one-fifth of the restricted shares shall be vested upon the first, second, third, fourth and fifth anniversary of the grant date, respectively.
2013 Plan [Member] \| Restricted shares [Member] \| Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares expected to vest							854,405
Stock option vesting period							44 months
Stock option vesting period, description							one-fourth of the restricted shares shall be vested upon the eighth month, and three-fourth of the restricted shares shall be vested during the remaining thirty six months.
2013 Plan [Member] \| Restricted shares [Member] \| Tranche Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares expected to vest							689,700
Stock option vesting period							4 years
Stock option vesting period, description							one-fourth, and one-fourth of the restricted shares shall be vested upon the second, third and fourth anniversary of the grant date, respectively.
2013 Plan [Member] \| Restricted shares [Member] \| Tranche Five [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares expected to vest							640,100
Stock option vesting period							2 years
Stock option vesting period, description							half of the restricted shares shall be vested upon the first and second anniversary of the grant date, respectively.
2013 Plan [Member] \| Restricted shares [Member] \| Tranche Six [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares expected to vest							160,000
Stock option vesting period							1 year
Stock option vesting period, description							one-year schedule in which all of the restricted shares shall be vested upon the first anniversary of the grant date.
2013 Plan [Member] \| Restricted shares [Member] \| Tranche Seven [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares expected to vest							120,000
2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant					14,195,412
Unrecognized compensation expense relating to the restricted shares							$ 12,416
Restricted shares issued to non-employees							60,000
2014 Plan [Member] \| Senior Officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense relating to the restricted shares							$ 10,138
Restricted shares issued to non-employees							60,000
2014 Plan [Member] \| Restricted shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted							6,749,000	3,890,500
2014 Plan [Member] \| Restricted shares [Member] \| Certain Officers and Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted							14,536,000
2014 Plan [Member] \| Restricted shares [Member] \| Tranche One [Member] \| Certain Officers and Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares expected to vest							9,040,500
Stock option vesting period							5 years
Stock option vesting period, description							one-fifth of the restricted shares shall be vested upon the first, second, third, fourth and fifth anniversary of the grant date, respectively.
2014 Plan [Member] \| Restricted shares [Member] \| Tranche Two [Member] \| Certain Officers and Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares expected to vest							5,400,000
Stock option vesting period							4 years
Stock option vesting period, description							one-fourth of the restricted shares shall be vested upon the first, second, third and fourth anniversary of the grant date, respectively.
2014 Plan [Member] \| Restricted shares [Member] \| Tranche Three [Member] \| Certain Officers and Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares expected to vest							9,000
Stock option vesting period							2 years
2014 Plan [Member] \| Restricted shares [Member] \| Tranche Four [Member] \| Certain Officers and Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares expected to vest							86,500
Stock option vesting period, description							half of the restricted shares shall be vested upon the first and second anniversary of the grant date, respectively.

Share-based compensation - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Dec. 01, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based compensation [Abstract]
Number of share options, Granted		0	561,705
Number of share options, Forfeited		(14,375)	(1,494,922)
Number of share options, Expired		(182,510)	(3,606,304)
Number of share options, Converted to restricted shares	(3,776,711)	0	(80,000)
Number of share options, Exercised		(440,465)	(3,189,944)
Number of share options, Outstanding, Ending balance		1,493,470	2,130,820	9,940,285
Number of share options, Vested and expected to vest, Ending balance		1,440,923	1,008,645	9,642,307
Number of share options, Exercisable, Ending balance		1,217,050	1,430,870	9,129,958
Weighted average exercise price, Granted		$ 0	$ 0.88
Weighted average exercise price, Forfeited		3.21	3.22
Weighted average exercise price, Expired		2.22	1.78
Weighted average exercise price, Converted to restricted shares		0	2.4
Weighted average exercise price, Exercised		1.81	0.25
Weighted average exercise price, Ending balance		2.65	2.13	$ 1.88
Weighted average exercise price, Vested and expected to vest at end of period		2.67	1.76	1.86
Weighted average exercise price, Exercisable at end of period		2.7	2.16	1.81
Weighted-average grant date fair value, Granted		0	0.76
Weighted-average grant date fair value, Vested and expected to vest, Ending balance		0.85	0.73	0.49
Weighted-average grant date fair value, Exercisable, Ending balance		$ 0.84	$ 0.86	$ 0.41
Weighted-average remaining contractual life, Ending balance		3 years 4 months 20 days	4 years 5 months 16 days	1 year 11 months 12 days
Weighted-average remaining contractual life, Vested and expected to vest, Ending balance		3 years 2 months 26 days	4 years 7 months 13 days	1 year 10 months 13 days
Weighted-average remaining contractual life, Exercisable, Ending balance		3 years 2 months 12 days	4 years 11 days	1 year 5 months 26 days
Aggregate intrinsic value, Outstanding		$ 6	$ 556	$ 3,067
Aggregate intrinsic value, Vested and expected to vest, Ending balance		6	464	3,057
Aggregate intrinsic value, Exercisable, Ending balance		$ 6	$ 406	$ 3,042

Share-based compensation - Summary of Restricted Shares Activities (Detail) - $ / shares		12 Months Ended
	Dec. 01, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restricted shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted shares, Converted from share options	1,505,787
2010 share incentive plan [Member] \| Restricted shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted shares, Unvested, beginning balance		432,217	1,505,787
Number of restricted shares, Converted from share options			80,000
Number of restricted shares, Granted		1,170,000
Number of restricted shares, Vested		(274,960)	(390,560)
Number of restricted shares, Forfeited		(384,037)	(763,010)
Number of restricted shares, Unvested, Ending balance		943,220	432,217	1,505,787
Number of restricted shares, Vested and expected to vest, Ending balance		801,737	367,384
Weighted-Average Grant-Date Fair Value, Converted from share options			$ 1.71
Weighted-Average Grant Date Fair Value, Granted		$ 0
2013 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted shares, Granted		8,664,980	7,987,435
2013 Plan [Member] \| Restricted shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted shares, Unvested, beginning balance		3,796,398	7,200,778	8,095,238
Number of restricted shares, Granted				4,233,558
Number of restricted shares, Vested		(1,520,760)	(2,627,815)	(1,563,222)
Number of restricted shares, Forfeited		(561,103)	(776,565)	(3,564,796)
Number of restricted shares, Unvested, Ending balance		1,714,535	3,796,398	7,200,778
Number of restricted shares, Vested and expected to vest, Ending balance		1,457,355	3,226,939	6,120,662
Weighted-Average Grant Date Fair Value, Granted				$ 2.89
2014 Plan [Member] \| Restricted shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted shares, Unvested, beginning balance		5,761,400	3,896,500
Number of restricted shares, Granted		6,749,000	3,890,500
Number of restricted shares, Vested		(1,262,200)	(859,100)
Number of restricted shares, Forfeited		(971,900)	(1,166,500)
Number of restricted shares, Unvested, Ending balance		10,276,300	5,761,400	3,896,500
Number of restricted shares, Vested and expected to vest, Ending balance		8,734,855	4,897,100
Weighted-Average Grant Date Fair Value, Granted		$ 0	$ 1.53

Share-based compensation - Schedule of Fair Values of Stock Options Granted (Detail)

12 Months Ended

Dec. 31, 2015

Dec. 31, 2014

Risk-free interest rate, Minimum

^[1]

0.77%

Risk-free interest rate, Maximum

^[1]

1.76%

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

^[2]

Volatility rate, Minimum

^[3]

40.07%

Volatility rate, Maximum

^[3]

43.30%

Minimum [Member]

Expected term (in years)

^[4]

4 years 25 days

4 years 1 month 17 days

Maximum [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Expected term (in years)

^[4]

5 years 6 months 25 days

4 years 6 months 29 days

[1]	The risk-free interest rate of periods within the contractual life of the share option is based on the USD denominated China Government Bond yield as at the valuation dates.
[2]	The Company has no history or expectation of paying dividends on its common shares.
[3]	Expected volatility is estimated based on the average of historical volatilities of the comparable companies in the same industry as at the valuation dates.
[4]	The expected term is developed by assuming the share options will be exercised in the middle point between the vesting dates and maturity dates.

Share-based compensation - Schedule of Recognized Compensation Costs (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total compensation costs	$ 9,348	$ 9,728	$ 7,644
Sales and marketing expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total compensation costs	98	131	66
General and administrative expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total compensation costs	6,267	6,701	6,407
Research and development expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total compensation costs	$ 2,983	$ 2,896	$ 1,171

Basic and Diluted Net income / (loss) Per Share (Schedule of Basic and Diluted Net income / (loss) Per Share) (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Numerator:
Net income/(loss) from continuing operations	$ (23,976)	$ (2,370)	$ 28,269
Net loss from discontinued operations	(207)	(12,096)	(18,407)
Net income/(loss)	(24,183)	(14,466)	9,862
Less: Net (loss) attributable to the non-controlling interest	(72)	(1,299)	(950)
Net income/(loss) attributable to Xunlei Limited	(24,111)	(13,167)	10,812
Deemed dividend to certain shareholders from repurchase of shares			(14,926)
Acceleration of amortization of beneficial conversion feature of Series E upon initial public offering			(49,346)
Deemed dividend to preferred shareholders upon IPO			(32,807)
Net loss attributable to Xunlei Limited’s common shareholders	(24,111)	(13,167)	(105,366)
Numerator of basic net loss per share from continuing operations	(23,904)	(1,071)	(86,959)
Net loss from discontinued operations	(207)	(12,096)	(18,407)
Numerator for diluted loss per share from continuing operations	(23,904)	(1,071)	(86,959)
Numerator for diluted loss per share from discontinued operations	$ (207)	$ (12,096)	$ (18,407)
Denominator:
Denominator for basic net loss per share-weighted average shares outstanding	334,155,668	335,987,595	194,711,227
Denominator for diluted net loss per share	334,155,668	335,987,595	194,711,227
Basic net loss per share from continuing operations	$ (0.07)	$ (0.00)	$ (0.45)
Basic net loss per share from discontinued operations	(0.00)	(0.04)	(0.09)
Diluted net loss per share from continuing operations	(0.07)	(0.00)	(0.45)
Diluted net loss per share from discontinued operations	$ (0.00)	$ (0.04)	$ (0.09)
Series D Preferred Stock [Member]
Numerator:
Accretion to convertible redeemable preferred shares redemption value			$ (1,870)
Deemed dividend to preferred shareholders			(279)
Series C To One Series C [Member]
Numerator:
Contingent beneficial conversion feature			(57)
Series E Preferred Shares [Member]
Numerator:
Accretion to convertible redeemable preferred shares redemption value			(12,754)
Amortization of beneficial conversion feature			(4,139)
Acceleration of amortization of beneficial conversion feature of Series E upon initial public offering			$ (49,346)

Basic and diluted net income / (loss) per share (Schedule of Anti-dilutive Shares Excluded from Computation of Diluted Net Income per Common Share) (Detail) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Stock options and restricted shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from computation of diluted net income per common share	2,902,950	1,673,342	9,041,434
Preferred shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from computation of diluted net income per common share			93,213,683

Related Party Transactions - Schedule of Relationship Between Related Parties with their Groups (Detail)	12 Months Ended
	Dec. 31, 2016
Zhuhai Qianyou [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Equity investment of the Group
Hao Cheng [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Co-founder and shareholder of the Group
Chuan Wang [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Director of the Company
Shenglong Zou [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Co-founder and shareholder of the Group
Beijing Millet technology Co., LTD ("Beijing Xiaomi") [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Company owned by a shareholder of the Group
Leading Advice Holdings Limited [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Company owned by a Co-founder and shareholder of the Group
Vantage Point Global Limited [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Shareholder of the Company
Aiden & Jasmine Limited [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Shareholder of the Company
Kingsoft Corporation Limited [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Shareholder of the Company
King Venture Holdings Limited [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Principal shareholder of the Group (shareholding >=10%)
Xiaomi Venture Limited [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Principal shareholder of the Group
Morningside Technology Investments Limited [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Principal shareholder of the Group
Shenzhen Xunlei Big Data Information Service Co., Ltd. [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Equity investment of the Group
Shenzhen Xunlei Finance Information Service Co., Ltd. [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Subsidiary of the Group’s equity investment
Millet Communication Technology Co., Ltd. (“Millet Communication Technology”) [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Company owned by a shareholder of the Group
Beijing Millet Electronic Products Co., Ltd. [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Company owned by a shareholder of the Group
Beijing Millet Digital Technology Co., Ltd. [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Company owned by a shareholder of the Group
Millet Technology Co., Ltd. [Member]
Schedule of Other Related Party Transactions [Line Items]
Related parties relationship	Company owned by a shareholder of the Group

Related Party Transactions - Schedule of Significant Related Party Transactions (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Schedule of Other Related Party Transactions [Line Items]

Revenue, Net

$ 156,162

$ 129,635

$ 133,934

Advertisement revenue

16,874

4,802

5,834

Zhuhai Qianyou [Member]

Schedule of Other Related Party Transactions [Line Items]

Game sharing costs paid and payable to Zhuhai Qianyou

^[1]

154

127

402

Hao Cheng [Member]

Schedule of Other Related Party Transactions [Line Items]

Repayment from related party

Millet Technology Co., Ltd. [Member]

Schedule of Other Related Party Transactions [Line Items]

Revenue, Net

316

Beijing Millet Technology Co., LTD [Member]

Schedule of Other Related Party Transactions [Line Items]

Technology service revenue related party

1,010

344

303

Advertisement revenue

871

Millet Communication Technology Co., Ltd. [Member]

Schedule of Other Related Party Transactions [Line Items]

Revenue, Net

^[2]

2,483

Marketing Expense

Shenglong Zou [Member]

Schedule of Other Related Party Transactions [Line Items]

Advance to related party

Chuan Wang [Member]

Schedule of Other Related Party Transactions [Line Items]

Advance to related party

Aiden & Jasmine Limited [Member]

Schedule of Other Related Party Transactions [Line Items]

Accrued to related party

^[3]

1,125

Vantage Point Global Limited [Member]

Schedule of Other Related Party Transactions [Line Items]

Accrued to related party

^[3]

$ 146

$ 3,012

[1]	The Company obtained an exclusive game operation right from Zhuhai Qianyou, which is specialized in developing online games. According to the agreement, the Company will share revenues derived by the licensed games with Zhuhai Qianyou.
[2]	In 2016, Shenzhen Onething Technology entered into a contract with Millet Communication Technology for the provision of bandwidth to Millet Communication Technology at a mutually agreed price.
[3]	In 2014, the Group repurchased 3,860,733 common shares from Aiden & Jasmine Limited (Co founder’s company) for USD10,879 thousand and 10,334,679 common shares from Vantage Point Global Limited (Founder’s company) for USD29,121 thousand. According to the repurchase contract, the Company was entitled to an amount (the “Withheld Price”) to withhold any taxes with respect to this repurchase as required under the applicable laws. If the Sellers (Aiden & Jasmine Limited and Vantage Point Global Limited) have not been specifically required by the applicable governmental or regulatory authority to pay any taxes as required under the applicable laws in connection with the repurchase, after the fifth anniversary of the Closing Date, the Company will pay to the Sellers the Withheld Price with a simple interest thereon at the rate of five percent (5%) per annum (the “repayment price”) from the Closing Date. Therefore, the Withheld Price for Aiden & Jasmine Limited and Vantage Point Global Limited was USD 1,125 thousand (including interest of USD 37 thousand) and USD 3,012 thousand (including interest of USD 100 thousand) respectively. The interest accrued in 2016 was USD 54 thousand and 146 thousand for Aiden & Jasmine Limited and Vantage Point Global Limited respectively.

Related Party Transactions - Additional Information (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2016

Dec. 31, 2014

Dec. 31, 2015

Treasury stock [Member]

Schedule of Other Related Party Transactions [Line Items]

Interest on withheld tax price

5.00%

Aiden & Jasmine Limited [Member]

Schedule of Other Related Party Transactions [Line Items]

Aiden & Jasmine Limited [Member] | Treasury stock [Member]

^[1]

$ 54

$ 1,125

$ 54

Schedule of Other Related Party Transactions [Line Items]

Shares repurchased

3,860,733

Shares repurchased, value

$ 10,879

Interest on withheld tax

Vantage Point Global Limited [Member]

1,125

Schedule of Other Related Party Transactions [Line Items]

Vantage Point Global Limited [Member] | Treasury stock [Member]

^[1]

146

$ 3,012

146

Schedule of Other Related Party Transactions [Line Items]

Shares repurchased

10,334,679

Shares repurchased, value

$ 29,121

Interest on withheld tax

$ 100

Fair value changes of warrants liabilities

$ 3,012

$ 146

[1]

In 2014, the Group repurchased 3,860,733 common shares from Aiden & Jasmine Limited (Co founder’s company) for USD10,879 thousand and 10,334,679 common shares from Vantage Point Global Limited (Founder’s company) for USD29,121 thousand. According to the repurchase contract, the Company was entitled to an amount (the “Withheld Price”) to withhold any taxes with respect to this repurchase as required under the applicable laws. If the Sellers (Aiden & Jasmine Limited and Vantage Point Global Limited) have not been specifically required by the applicable governmental or regulatory authority to pay any taxes as required under the applicable laws in connection with the repurchase, after the fifth anniversary of the Closing Date, the Company will pay to the Sellers the Withheld Price with a simple interest thereon at the rate of five percent (5%) per annum (the “repayment price”) from the Closing Date. Therefore, the Withheld Price for Aiden & Jasmine Limited and Vantage Point Global Limited was USD 1,125 thousand (including interest of USD 37 thousand) and USD 3,012 thousand (including interest of USD 100 thousand) respectively. The interest accrued in 2016 was USD 54 thousand and 146 thousand for Aiden & Jasmine Limited and Vantage Point Global Limited respectively.

Related Party Transactions - Schedule of Amount Due to from Related Party (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Other Related Party Transactions [Line Items]
Accounts payable to related party	$ 45	$ 38
Long-term payable to related party	4,537	4,337
Accounts and other receivable from related party	1,097	45
Zhuhai Qianyou [Member]
Schedule of Other Related Party Transactions [Line Items]
Accounts payable to related party	45	38	$ 84
Aiden & Jasmine Limited [Member]
Schedule of Other Related Party Transactions [Line Items]
Long-term payable to related party	1,233	1,179	1,125
Vantage Point Global Limited [Member]
Schedule of Other Related Party Transactions [Line Items]
Long-term payable to related party	3,304	3,158	3,012
Beijing Millet Technology Co., LTD [Member]
Schedule of Other Related Party Transactions [Line Items]
Accounts and other receivable from related party	95	30	5
Shenglong Zou [Member]
Schedule of Other Related Party Transactions [Line Items]
Accounts and other receivable from related party	9	9	10
Chuan Wang [Member]
Schedule of Other Related Party Transactions [Line Items]
Accounts and other receivable from related party	5	6	7
Millet Communication Technology Co., Ltd. [Member]
Schedule of Other Related Party Transactions [Line Items]
Accounts and other receivable from related party	939
Beijing Millet Payment Technologies Limited [Member]
Schedule of Other Related Party Transactions [Line Items]
Accounts and other receivable from related party	38
Shenzhen Xunlei Finance Information Service Co., Ltd. [Member]
Schedule of Other Related Party Transactions [Line Items]
Accounts and other receivable from related party	5
Shenzhen Crystal Technology Co., Ltd. [Member]
Schedule of Other Related Party Transactions [Line Items]
Accounts and other receivable from related party	$ 6

Taxation - Additional Information (Detail) - USD ($) $ in Thousands		12 Months Ended
	Apr. 14, 2008	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Income Tax [Line Items]
Effective income tax rate			15.00%	15.00%	10.00%
Tax rate percent			15.00%
Research and development expense percentage			150.00%
Preferential tax rate					10.00%	10.00%
Undistributed earnings of foreign subsidiaries			$ 19,883	$ 34,313
Foreign withholding taxes			1,988	$ 3,431
Tax Credit Carryforward, Amount			$ 17,363
PRC Enterprise [Member]
Income Tax [Line Items]
Effective income tax rate			25.00%
Shenzhen Xunlei [Member]
Income Tax [Line Items]
Income tax holiday description			Shenzhen Xunlei has been claiming this Super Deduction in ascertaining its tax assessable profits and brought forward tax losses from 2009 onwards. In addition, following the approval by the relevant tax authority in July 2010, Shenzhen Xunlei was recognized as an enterprise engaged in software development activities. Accordingly, it is entitled to a tax holiday of 2-year Exemption and 3-year 50% Reduction from 2010 onwards.
Preferential tax rate			15.00%	15.00%
Shenzhen Xunlei [Member] \| Scenario, Forecast [Member]
Income Tax [Line Items]
Preferential tax rate		15.00%
Shenzhen Onething [Member]
Income Tax [Line Items]
Effective income tax rate			15.00%
Preferential tax rate			15.00%
New Enterprise Income Tax Rate [Member]
Income Tax [Line Items]
Favorable statutory tax rate	15.00%
New Enterprise Income Tax Rate [Member] \| Subsidiaries And VIE's Subsidiaries [Member]
Income Tax [Line Items]
Effective income tax rate			25.00%
Enterprise Income Tax Rate [Member]
Income Tax [Line Items]
Effective income tax rate			15.00%
Shenzhen Special Economic Zone [Member]
Income Tax [Line Items]
Effective income tax rate			25.00%	25.00%	25.00%
Transitional income tax rates							24.00%	22.00%	20.00%	18.00%

Taxation - Schedule of Current and Deferred Portions of Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current income tax expenses	$ 71	$ 289	$ 397
Deferred income tax benefits	(1,335)	(1,175)	66
Income tax expense/ (benefit)	$ (1,264)	$ (886)	$ 463

Taxation - Summary of Aggregate Amount and Per Share Effect of Tax Holiday (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Aggregate dollar effect	$ (1,430)	$ (830)	$ 2,784
Per share effect—basic	$ 0	$ 0	$ 0.01
Per share effect—diluted	$ 0	$ 0	$ 0.01

Taxation - Reconciliation of Total Tax (Benefit) Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Continuing operations
Income tax expense/(benefit) at PRC statutory rate (based on statutory tax rate applicable to enterprises in Shenzhen, China)	$ (6,310)	$ (438)	$ 7,211
Effects of differences in tax rates in different jurisdictions applicable to entities of the Group outside of the PRC	2,145	2,400	(838)
Non-deductible expenses	12	14	714
Effect of Super Deduction available to Shenzhen Xunlei	(901)		(1,365)
Effect of tax holiday	1,430	(369)	(4,613)
Change in valuation allowance of deferred tax assets	6,396	4,750	291
Effect on deferred tax assets due to change in tax rates		(8)	(103)
Outside basis difference arising from VIE and its subsidiaries in the PRC	(5,743)	(2,174)	478
Expiration of tax loss	90	290	51
Others	1,617	(5,351)	(1,363)
Income tax expense/ (benefit)	$ (1,264)	$ (886)	$ 463

Taxation - Summary of Changes in Deferred Tax Asset and Liability Balances (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets, current portion:
Net operating loss carried forward	$ 1,276	$ 417
Amortization of intangible assets arising from intragroup transactions	51	95
Impairment of long-term equity investment		115
Allowance for advance to suppliers		120
Valuation allowance	(106)	(81)
Deferred tax assets, current portion, net	1,221	689
Deferred tax assets, non-current portion:
Net operating loss carried forward	12,093	13,016
Amortization of intangible assets arising from intragroup transactions		54
Impairment of long-term equity investment	348
Allowance for advance to suppliers	576
Valuation allowance	(9,745)	(4,477)
Deferred tax assets, non-current portion, net	3,272	8,593
Deferred tax liabilities, non-current portion:
Outside basis difference	(635)	(6,378)
Online game licenses [Member]
Deferred tax assets, current portion:
Impairment of online game licenses		$ 23

Taxation - Summary of Changes in Deferred Tax Asset and Liability Balances (Parenthetical) (Detail) $ in Thousands, ¥ in Millions	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 USD ($)
Income Tax [Line Items]
Net operating tax loss carryforwards	$ 17,363
Deferred tax liabilities	$ 25,512		$ 2,541
Shenzhen Xunlei [Member]
Income Tax [Line Items]
Capitalized software sold at market valuation \| ¥		¥ 42

Taxation - Summary of Net Operating Loss Carryforwards (Detail) $ in Thousands	Dec. 31, 2016 USD ($)
Net operating tax loss carryforwards [Line Items]
Net operating tax loss carryforwards	$ 17,363
2017 [Member]
Net operating tax loss carryforwards [Line Items]
Net operating tax loss carryforwards	775
2018 [Member]
Net operating tax loss carryforwards [Line Items]
Net operating tax loss carryforwards	5,795
2019 [Member]
Net operating tax loss carryforwards [Line Items]
Net operating tax loss carryforwards	3,414
2020 [Member]
Net operating tax loss carryforwards [Line Items]
Net operating tax loss carryforwards	559
2021 and thereafter [Member]
Net operating tax loss carryforwards [Line Items]
Net operating tax loss carryforwards	$ 6,820

Taxation - Schedule of Movement of Valuation Allowance (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Beginning balance	$ (4,559)	$ (291)
Additions	(5,292)	(4,268)	(291)
Write-off
Ending balance	$ (9,851)	$ (4,559)	$ (291)

Fair Value Measurements - Schedule of Financial Instruments Measured at Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fair value measurements, Short term investments	$ 181,960	$ 70,328
Fair value measurements, Total	259,075	384,685
Time deposits [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fair value measurements, Cash equivalent, time deposits with original maturities less than three months	115,944	314,357
Investments in financial instruments [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fair value measurements, Short term investments	143,131	70,328
Significant other observable inputs (Level 2) [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fair value measurements, Total	259,075	384,685
Significant other observable inputs (Level 2) [Member] \| Time deposits [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fair value measurements, Cash equivalent, time deposits with original maturities less than three months	115,944	314,357
Significant other observable inputs (Level 2) [Member] \| Investments in financial instruments [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fair value measurements, Short term investments	$ 143,131	$ 70,328

Other Income, Net - Schedule of Other Income, Net (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Subsidy income

$ 2,358

$ 1,902

$ 2,236

8,054

Dilution gains arising from deemed disposal of investment (note 11)

689

^[1]

702

^[1]

449

Investment loss-impairment of long-term investment (note 11)

(1,654)

(802)

Exchange losses

(354)

(2,771)

(176)

Settlement income

326

755

489

Others

458

175

(557)

Other income, net

6,503

3,627

13,966

Short-term Investments [Member]

Investment income from short-term investments

4,054

3,666

3,471

Other Long-term Investments [Member]

Investment income from short-term investments

$ 626

[1]

Commitments and Contingencies - Additional Information (Detail) ¥ in Thousands, $ in Thousands	1 Months Ended		12 Months Ended
	Jan. 31, 2015 USD ($)	Jan. 31, 2015 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Apr. 20, 2017
Loss Contingencies [Line Items]
Legal and litigation related expenses			$ 1,669		$ 3,307	$ 1,073
Aggregate amount of claimed damages	$ 1,370	¥ 8,400
Legal and litigation related expenses			2,904		2,601
Scenario, Forecast [Member] \| Copyright infringement [Member]
Loss Contingencies [Line Items]
Number of lawsuits pending							56
Pending Litigation [Member]
Loss Contingencies [Line Items]
Aggregate amount of claimed damages			12,870	¥ 89,270	13,980
Pending Litigation [Member] \| Scenario, Forecast [Member]
Loss Contingencies [Line Items]
Number of lawsuits pending							61
Switchboard, Servers, Office Software And Construction In Process [Member]
Loss Contingencies [Line Items]
Irrevocable purchase obligations			7,527
Rental commitments [Member]
Loss Contingencies [Line Items]
Total lease expenses			2,382		2,751	3,068
Bandwidth Lease Commitments [Member]
Loss Contingencies [Line Items]
Total lease expenses for continuing operations			$ 55,135		37,218	33,545
Total lease expenses for discontinued operations					$ 2,983	$ 6,828

Commitments and Contingencies - Future Minimum Payments under Non-Cancellable Leases (Detail) $ in Thousands	Dec. 31, 2016 USD ($)
Rental commitments [Member]
Operating Leased Assets [Line Items]
2017	$ 2,993
2018	2,761
2019	1,182
Future minimum payments, Total	6,936
Bandwidth Lease Commitments [Member]
Operating Leased Assets [Line Items]
2017	18,651
2018	322
2019	$ 18,973

Certain Risks and Concentration - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) Customer	Dec. 31, 2015 USD ($)	Dec. 31, 2014
Concentration Risk [Line Items]
Maximum foreign ownership in internet information provider or other value-added telecommunication service provider's business allowed under PRC laws and regulations	50.00%
Retained earnings and distributable reserves	$ (36,704)	$ (12,593)
Number of top customers accounted for net revenues	10	10	10
Accounts Payable,Inter-companies Balance, Current	$ 9,360	$ 11,626
Accrued Liabilities and Other Liabilities, Inter-companies Balance	$ 91,477	$ 105,872
Net revenues [Member] \| Customer concentration risk [Member]
Concentration Risk [Line Items]
Percentage of net revenues accounted from customers	18.00%	26.00%	16.00%
Shenzhen Xunlei Networking Technologies, Co., Ltd [Member]
Concentration Risk [Line Items]
operating contract term	10 years
Variable Interest Entity, Primary Beneficiary [Member]
Concentration Risk [Line Items]
Retained earnings and distributable reserves	$ 2,541
Variable Interest Entity, Not Primary Beneficiary [Member]
Concentration Risk [Line Items]
Retained earnings and distributable reserves		$ 25,512

Certain Risks and Concentration - Schedule of Consolidated Financial Information of VIEs and VIE's Subsidiaries - Balance sheet (Detail) - USD ($)
$ in Thousands

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

$ 199,504

$ 361,777

$ 404,275

$ 93,906

181,960

70,328

14,536

11,266

Due from related parties

1,097

1,221

689

374

480

13,593

13,068

412,285

457,653

Property and equipment, net

3,272

8,593

21,016

18,036

Construction in progress

574

10,746

13,433

Other long-term prepayments

20,497

21,896

1,187

7,431

509,795

538,361

Accounts payable (note a)

33,376

21,736

Due to a related party

Accrued liabilities and other payables (note b)

24,532

25,113

33,131

27,379

93,405

76,736

Deferred revenue and income, non-current portion

^[1]

4,082

5,383

Variable Interest Entity, Primary Beneficiary [Member]

103,545

93,680

40,393

32,461

28,749

69,522

14,824

11,573

Due from related parties

1,083

971

351

374

480

15,123

31,659

101,517

146,076

Equity method investments

25,479

9,884

Property and equipment, net

1,849

6,791

20,059

17,991

Construction in progress

574

11,083

14,297

Other long-term prepayments

20,497

21,896

1,187

7,430

Total non-current assets

80,728

78,303

182,245

224,379

Accounts payable (note a)

^[2]

44,162

33,262

Due to a related party

Accrued liabilities and other payables (note b)

24,260

24,902

Income tax payable

2,253

2,407

^[3]

104,114

131,312

174,834

191,921

Deferred revenue and income, non-current portion

3,539

4,751

Total non-current liabilities

3,539

4,751

$ 178,373

$ 196,672

[1]	As of December 31, 2016, the non-current portion included membership subscription revenue of USD 820 thousand (2015: USD719 th0usand), government grants of USD2,719 thousand (2015: USD4,032 thousand), and reimbursement from the depositary of USD543 thousand (2015: USD632 thousand).
[2]	The balance included inter-companies balances with the Company and its subsidiaries of USD 11,626 thousand and USD 9,360 thousand as of December 31, 2015 and 2016, respectively.
[3]	The balance included inter-companies balances with the Company and its subsidiaries of USD 105,872 thousand and USD 91,477 thousand as of December 31, 2015 and 2016, respectively.

Certain Risks and Concentration - Schedule of Consolidated Financial Information of VIEs and VIE's Subsidiaries - Income Statement (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net revenue from continuing operations	$ 156,162	$ 129,635	$ 133,934
Net income / (loss) attributable to Xunlei Limited	(24,111)	(13,167)	10,812
Variable Interest Entity, Primary Beneficiary [Member]
Net revenue from continuing operations	156,192	129,198	132,515
Net income / (loss) attributable to Xunlei Limited	$ (32,402)	$ (6,408)	$ 12,677

Certain Risks and Concentration - Schedule of Consolidated Financial Information of VIEs and VIE's Subsidiaries - Cash Flow (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net cash provided by operating activities	$ 16,970	$ 13,764	$ 48,202
Net cash (used in)/provided by investing activities	(158,335)	(54,982)	(70,546)
Net cash provided by financing activities	(11,041)	5,030	333,268
Net increase in cash and cash equivalents	(152,406)	(36,188)	310,924
Variable Interest Entity, Primary Beneficiary [Member]
Net cash provided by operating activities	3,565	41,723	70,822
Net cash (used in)/provided by investing activities	1,859	(51,721)	(78,335)
Net cash provided by financing activities	2,508	1,055	856
Net increase in cash and cash equivalents	$ 7,932	$ (8,943)	$ (6,657)

Subsequent Events - Additional Information (Detail) ¥ in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2017 shares	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)
Henan Tourism Information Co., Ltd., [Member]
Subsequent Event [Line Items]
Business Combination, Consideration Payable		$ 3.5	¥ 24
Business Acquisition, Percentage of Voting Interests Acquired		80.00%	80.00%
Subsequent Event [Member] \| Treasury Stock [Member]
Subsequent Event [Line Items]
Treasury Stock, Shares, Acquired	465,350
Subsequent Event [Member] \| Restricted shares [Member]
Subsequent Event [Line Items]
Restricted stock granted	1,130,000

Kingsoft acquisition in 2014 Additional Information (Detail) - Kingsoft Corporation Limited [Member] $ in Thousands	Sep. 05, 2014 USD ($)
Business Combination, Consideration Transferred, Fair value of share based award	$ 300
Business Combination, Consideration Transferred, Fair value of share based award attribute to Serives by Employess Before combination	303
Business Combination, Consideration Transferred, Fair value of share based award attribute to Serives by Employess After combination	44
Payments to Acquire Businesses, Gross	$ 33,000

Kingsoft acquisition in 2014 (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property and equipment	$ 255
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Goodwill	20,497	$ 21,896
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	33,303
Trademarks [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	6,120
Noncompete Agreements [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	1,490
Technology [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 2,381

Additional information: condensed financial statements of the Company - Schedule of Condensed Balance Sheets (Detail) - USD ($)
$ in Thousands

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

$ 199,504

$ 361,777

$ 404,275

$ 93,906

13,593

13,068

412,285

457,653

Property, equipment and software, net

21,016

18,036

509,795

538,361

Accounts payable

33,376

21,736

24,532

25,113

93,405

76,736

^[1]

4,082

5,383

4,537

4,337

Other long-term payable

886

846

103,545

93,680

Treasury shares 29,558,094 shares as at December 31, 2015 and 38,332,209 shares as at December 31, 2016

Shareholders' equity

Common shares

Total Xunlei Limited’s shareholders’ equity

408,238

446,749

457,891

79,194

Total liabilities and shareholders’ equity

509,795

538,361

Xunlei Limited [Member]

Due from subsidiaries and consolidated VIEs

273,160

292,175

$ 309,457

$ 28,863

101,130

92,864

348

1,090

374,638

386,129

Property, equipment and software, net

Investments in subsidiaries and consolidated VIEs

43,447

68,481

418,088

454,610

Due to subsidiaries and consolidated VIEs

Accounts payable

1,862

388

Accrued liabilities and other payables

272

211

1,695

1,393

3,884

2,047

543

632

4,537

4,337

Other long-term payable

886

845

9,850

7,861