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v2.4.1.9

Additional information: condensed financial statements of the Company - Schedule of Condensed Statements of Operations (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Condensed Income Statements, Captions [Line Items] |  |  |
Revenues | $ 179,529 us-gaap_SalesRevenueNet | $ 174,594 us-gaap_SalesRevenueNet | $ 140,521 us-gaap_SalesRevenueNet
Cost of revenues | (98,459)us-gaap_CostOfRevenue | (93,260)us-gaap_CostOfRevenue | (84,012)us-gaap_CostOfRevenue
Gross profit | 81,070 us-gaap_GrossProfit | 81,334 us-gaap_GrossProfit | 56,509 us-gaap_GrossProfit
Operating expenses |  |  |
Research and development expenses | (35,287)us-gaap_ResearchAndDevelopmentExpense | (28,832)us-gaap_ResearchAndDevelopmentExpense | (20,357)us-gaap_ResearchAndDevelopmentExpense
Sales and marketing expenses | (29,253)us-gaap_SellingAndMarketingExpense | (26,610)us-gaap_SellingAndMarketingExpense | (20,219)us-gaap_SellingAndMarketingExpense
General and administrative expenses | (29,960)us-gaap_GeneralAndAdministrativeExpense | (23,073)us-gaap_GeneralAndAdministrativeExpense | (18,474)us-gaap_GeneralAndAdministrativeExpense
Total operating expenses | (94,500)us-gaap_OperatingExpenses | (78,515)us-gaap_OperatingExpenses | (59,050)us-gaap_OperatingExpenses
Operating income / (loss) | (11,874)us-gaap_OperatingIncomeLoss | 3,839 us-gaap_OperatingIncomeLoss | 2,125 us-gaap_OperatingIncomeLoss
Interest income | 6,733 us-gaap_InterestIncomeOther | 1,189 us-gaap_InterestIncomeOther | 1,377 us-gaap_InterestIncomeOther
Interest expense | (163)us-gaap_InterestExpenseDebt |  | (1,400)us-gaap_InterestExpenseDebt
Other (loss) / income, net | 13,966 us-gaap_OtherNonoperatingIncomeExpense | 4,679 us-gaap_OtherNonoperatingIncomeExpense | 564 us-gaap_OtherNonoperatingIncomeExpense
Income before income tax | 8,403 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 9,732 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 2,621 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income tax | 1,459 us-gaap_IncomeTaxExpenseBenefit | 647 us-gaap_IncomeTaxExpenseBenefit | (2,239)us-gaap_IncomeTaxExpenseBenefit
Net income | 9,862 us-gaap_ProfitLoss | 10,379 us-gaap_ProfitLoss | 382 us-gaap_ProfitLoss
Net income attributable to the non-controlling interest | (950)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (283)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (121)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Net (loss) / income attributable to Xunlei Limited's common shareholders | (105,366)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 2,268 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | (313)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Xunlei Limited [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Revenues | 0 us-gaap_SalesRevenueNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_SalesRevenueNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_SalesRevenueNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cost of revenues | (1,673)us-gaap_CostOfRevenue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (2,264)us-gaap_CostOfRevenue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (3,075)us-gaap_CostOfRevenue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Gross profit | (1,673)us-gaap_GrossProfit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (2,264)us-gaap_GrossProfit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (3,075)us-gaap_GrossProfit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Operating expenses |  |  |
Research and development expenses |  |  | (1,369)us-gaap_ResearchAndDevelopmentExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Sales and marketing expenses |  | (241)us-gaap_SellingAndMarketingExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (489)us-gaap_SellingAndMarketingExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
General and administrative expenses | (996)us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (972)us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1,315)us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Total operating expenses | (996)us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1,213)us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (3,173)us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Operating income / (loss) | (2,669)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (3,477)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (6,248)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Interest income | 6,171 us-gaap_InterestIncomeOther / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 706 us-gaap_InterestIncomeOther / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,089 us-gaap_InterestIncomeOther / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Interest expense | (163)us-gaap_InterestExpenseDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Other (loss) / income, net | 7,602 us-gaap_OtherNonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,651 us-gaap_OtherNonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (885)us-gaap_OtherNonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Income from subsidiaries and consolidated VIEs | (129)xnet_IncomeLossFromSubsidiariesAndVariableInterestEntities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 11,782 xnet_IncomeLossFromSubsidiariesAndVariableInterestEntities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 6,547 xnet_IncomeLossFromSubsidiariesAndVariableInterestEntities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Income before income tax | 10,812 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 10,662 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 503 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Income tax | 0 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net income | 10,812 us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 10,662 us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 503 us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net income attributable to the non-controlling interest | 0 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net (loss) / income attributable to Xunlei Limited's common shareholders | $ 10,812 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 10,662 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 503 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_ParentCompanyMember

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