Document and Entity Information Entity Addresses [Table] Class of Stock [Axis] Class of Stock [Domain] ADR Common shares Entity Addresses, Address Type [Axis] Address Type [Domain] Business Contact Entity Addresses [Line Items] Document and Entity Information Document Type Document Registration Statement Document Annual Report Document Period End Date Document Transition Report Document Shell Company Report Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Address, Address Line One Entity Address, Address Line Two Entity Address, City or Town Entity Address, Postal Zip Code Entity Address, Country Contact Personnel Name Contact Personnel Email Address Title of 12(b) Security Security Exchange Name Trading Symbol Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Emerging Growth Company ICFR Auditor Attestation Flag Document Financial Statement Error Correction [Flag] Document Accounting Standard Entity Shell Company Auditor Firm ID Auditor Name Auditor Location Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Country Region City Area Code Local Phone Number Consolidated Balance Sheets Statement [Table] Statement [Table] Statement [Line Items] Statement Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of the year Cash and cash equivalents at beginning of the year Cash and cash equivalents Cash on hand and cash held at bank Short-term Investments. Short-term investments Accounts Receivable, Net, Current Accounts receivable, net Accounts receivable, net Accounts receivable, net (Allowance for current expected credit losses of US$1,258 and US$1,471 as of December 31, 2024 and 2025, respectively) Inventory, Net Inventories Other Receivables, Net, Current Due from related parties (Allowance for current expected credit losses of US$691 and US$334 as of December 31, 2024 and 2025, respectively) Amounts due from related parties - current Prepaid Expense and Other Assets, Current Prepayments and other current assets Total Prepayments and other current assets (Allowance for current expected credit losses and impairment of US$6,223 and US$5,516 as of December 31, 2024 and 2025, respectively) Assets, Current Total current assets Assets, Noncurrent [Abstract] Non-current assets: Long-term Investments. Long-term investments Long-term Investments, Total Deferred Income Tax Assets, Net Deferred tax assets Property, Plant and Equipment, Net Property and equipment, net Total Operating Lease, Right-of-Use Asset Net book amount, Ending balance Net book amount, Beginning balance Operating lease assets Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Total Goodwill Ending balance Beginning balance Goodwill Other Receivable, after Allowance for Credit Loss, Noncurrent Due from a related party (Allowance for current expected credit losses of nil and US$174 as of December 31, 2024 and 2025, respectively) Amounts due from a related party - non-current Prepaid Expense and Other Assets, Noncurrent Total Long-term prepayments and other assets Restricted Cash, Noncurrent Restricted cash Assets Total assets Liabilities [Abstract] Liabilities Liabilities, Current [Abstract] Current liabilities: Current liabilities (including amounts of the consolidated variable interest entity and its subsidiaries ("VIEs") without recourse to the Company of US$185,762 and US$256,407 as of December 31, 2024 and 2025, respectively) Accounts Payable, Current Accounts payable Accounts payable Other Liabilities, Current Amounts due to related parties Due to related parties Contract with Customer, Liability, Current Contract liabilities, current portion Total Current Taxes Payable, Current Income tax payable Income tax payable Accrued Liabilities and Other Liabilities Accrued liabilities and other payables Accrued liabilities and other payables Loans Payable to Bank, Current Short-term borrowings and current portion of long-term borrowings Operating Lease, Liability, Current Lease liabilities, current portion Lease liabilities Liabilities, Current Current liabilities Total current liabilities. Liabilities, Noncurrent [Abstract] Noncurrent liabilities: Non-current liabilities (including amounts of the consolidated VIEs without recourse to the Company of US$97,997 and US$119,707 as of December 31, 2024 and 2025, respectively) Contract with Customer, Liability, Noncurrent Contract liabilities Total Non-current Deferred Tax Liabilities, Net, Noncurrent Deferred tax liabilities Loans Payable to Bank, Noncurrent Long-term borrowings Other Accrued Liabilities, Noncurrent Other long-term payables Operating Lease, Liability, Noncurrent Lease liabilities Lease liabilities Liabilities Total liabilities Commitments and Contingencies. Commitments and contingencies Commitments and contingencies Stockholders' Equity Attributable to Parent [Abstract] Equity Shareholders' equity Common Stock, Value, Issued Common shares Common shares (375,001,940 shares issued and 307,351,196 shares outstanding as of December 31, 2024; 375,001,940 shares issued and 314,277,001 shares outstanding as of December 31, 2025) The amount allocated to treasury stock as presented in statement of financial position. Treasury Share Value Reverse Treasury shares Treasury shares (67,650,744 shares and 60,724,939 shares as of December 31, 2024 and 2025, respectively) Additional Paid in Capital Additional paid-in-capital Amount set aside as reserve under the statute for the purpose specified under the statute. Statutory Reserve Statutory reserves Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Retained Earnings (Accumulated Deficit) (Accumulated deficits)/retained earnings Stockholders' Equity Attributable to Parent Total Xunlei Limited's shareholders' equity Stockholders' Equity Attributable to Noncontrolling Interest Non-controlling interests Interest on equity Liabilities and Equity Total liabilities and shareholders' equity Consolidated Entities [Axis] Consolidated Entities [Domain] VIEs VIE Recourse Status [Axis] Recourse Status [Domain] Nonrecourse [Member] Nonrecourse Allowance for Doubtful Accounts Receivable, Current Less: Allowance for current expected credit losses Balance at end of the year Balance at beginning of the year Allowance for credit losses of accounts receivable Amount of allowance for credit loss on due from related parties, classified as current. Due from Related Parties, Allowance For Credit Loss, Current Allowance for current expected credit losses of due from related parties Amount of allowance for credit loss on prepayments and other current assets, classified as current. Prepayments And Other Current Assets, Allowance for Credit Loss, Current Less: Allowance for current expected credit losses and impairment Balance at end of the year Balance at beginning of the year Allowance for credit losses of prepayments and other current assets Amount of allowance for credit loss on due from related parties, classified as non-current. Due from Related Parties, Allowance For Credit Loss, Non-Current Allowance for current expected credit losses of Due from related parties Liabilities, Noncurrent Non-current liabilities Total non-current liabilities Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Treasury Stock, Shares Treasury Stock, Shares, Ending Balance Treasury Stock, Shares, Beginning Balance Treasury stock, shares Consolidated Statements of Comprehensive Income Revenues [Abstract] Net revenues Net revenues Total revenues, net of rebates and discounts (including transactions with related parties of US$17,270, US$15,963 and US$16,309 for the years ended December 31, 2023, 2024 and 2025, respectively) Segment total revenues Amount of business taxes and surcharges included in gross revenues, net of rebates. Business Taxes And Surcharges Taxes and surcharges Revenues Revenues Net revenues Total revenues, net of rebates and discounts (including transactions with related parties) Cost of Revenue Costs of revenues (including transactions with related parties of US$39, nil and nil for the years ended December 31, 2023, 2024 and 2025, respectively) Cost of revenues Total Costs of revenues (including transactions with related parties) Gross Profit Gross profit Operating Expenses [Abstract] Operating expenses Research and Development Expense Research and development expenses Selling and Marketing Expense Sales and marketing expenses Selling and Marketing Expense General and Administrative Expense General and administrative expenses General and administrative expenses Goodwill, Impairment Loss Impairment of goodwill Impairment of goodwill The amount of credit loss (expenses)/write-back, net. Credit Loss Expenses/Write-Back, Net Credit loss (expenses)/write-back, net Credit loss expenses/(write-back), net Operating Expenses Operating expenses Total operating expenses Operating Income (Loss) Operating (loss)/income Segment income from operations Interest Income, Other Interest income Interest income Interest Expense, Debt Interest expense Interest expense Other Nonoperating Income (Expense) Other income/(loss), net Total Other income, net Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income/(loss) before income taxes Income Tax Expense (Benefit) Income tax (expenses)/benefits Income tax (expenses)/benefits Income tax benefits Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Net income for the year Net Income (Loss) Attributable to Noncontrolling Interest Less: net income/(loss) attributable to the non-controlling interests Net income attributable to Xunlei Limited Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income for the year Net income Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Other comprehensive (loss)/income: Currency translation adjustments, net of tax Currency translation adjustments Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income/(loss) Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Less: comprehensive income/(loss) attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income/(loss) attributable to Xunlei Limited Basic and diluted net income per share Income per share for common shares Earnings Per Share, Basic Basic (in dollars per share) Basic net income per share (in dollars per share) Earnings Per Share, Diluted Diluted (in dollars per share) Diluted net income per share (in dollars per share) Weighted average number of common shares used in calculating Basic Weighted average number of common shares outstanding, basic (in shares) Basic (in shares) Diluted Weighted average number of common shares outstanding, diluted (in shares) Diluted (in shares) Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Domain] Related Party [Member] Related parties Related Party Transaction [Line Items] Related party transactions Consolidated Statements of Changes in Shareholders' Equity Equity Components [Axis] Equity Component [Domain] Treasury stock Additional paid-in capital [Member] Additional paid-in capital Statutory Reserve [Member] Statutory reserves [Member] Statutory reserves Accumulated other comprehensive income/(loss) [Member] Accumulated other comprehensive loss Retained earnings (Accumulated deficits) [Member] (Accumulated deficits)/ retained earnings Total Xunlei Limited's shareholders' equity [Member] Total Xunlei Limited's shareholders' equity Non-controlling interest [Member] Non-controlling interest Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Ending Balance, Amount Beginning Balance, Amount Shares, Outstanding Ending Balance, Shares Beginning Balance, Shares Stock Repurchased During Period, Value Repurchase of common shares Stock Repurchased During Period, Shares Repurchase of common shares (in shares) Number of shares repurchased under repurchase programs Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition Share-based compensation Stock Issued During Period Value For Restricted Shares Vested Restricted shares vested Stock Issued During Period, Shares, Restricted Stock Award, Gross Restricted shares vested (in shares) The amount of appropriation of statutory reserves. Appropriation of Statutory Reserves Appropriation of statutory reserves Noncontrolling Interest, Increase from Business Combination Acquisition of a subsidiary Consolidated Statements of Cash Flows Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash generated from operating activities Depreciation Total Depreciation of property and equipment Amortization of Intangible Assets Amortization expense Amortization of intangible assets Operating Lease Right Of Use Asset Amortization Amortization Amortization of operating lease assets Amortization Gain (Loss) on Disposition of Assets Losses/(gains) on disposal of property and equipment Amount of gain (loss) on modification of lease before expiration of lease term. Gain (Loss) on Modification of Lease Gains on modification of operating leases Share-based Compensation. Share-based compensation expenses Investment Income, Net Net unrealized investment income from short-term investments Impairment of Long-Lived Assets Held-for-use Impairment of property and equipment Impairment of Intangible Assets (Excluding Goodwill) Impairment of intangible assets Impairment charge Inventory Write-down Write-downs of inventories The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that long term investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. Impairment of Long Term Investments Impairment of long-term investments Impairment on long-term investments Unrealized Gain (Loss) on Investments Fair value changes on long-term investments Fair value changes on long-term investments Amount of realized gain (loss) on long-term investments sold and disposal of subsidiary during the period. Gain (Loss) From Disposal Of Long Term Investments And Subsidiaries Gains from disposal of long-term investments and subsidiaries Interest Expense, Long-term Debt Interest expense accrued on long-term payables Deferred Income Taxes and Tax Credits Deferred income taxes Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Prepaid Expenses, Other Prepayments and other assets Increase (Decrease) in Due from Related Parties, Current Due from/to related parties