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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Accounting Policies and General Information [Line Items] |  |  |  |
Allowance for doubtful accounts | $ 9,352,000 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent | $ 12,111,000 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent | $ 7,875,000 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent | $ 4,150,000 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Impairment of long-term investments | 0 us-gaap_ImpairmentOfInvestments | 0 us-gaap_ImpairmentOfInvestments | 0 us-gaap_ImpairmentOfInvestments |
Fair value of a reporting unit less than carrying amount, including goodwill | 50.00%us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount |  |  |
Goodwill impairment losses | 0 us-gaap_GoodwillImpairmentLoss |  |  |
Sales rebates provided to the agencies and advertisers | 5,005,000 us-gaap_SalesDiscountsServices | 7,207,000 us-gaap_SalesDiscountsServices | 7,414,000 us-gaap_SalesDiscountsServices |
Content sub-licensing revenue | 9,218,000 us-gaap_LicenseAndServicesRevenue | 7,369,000 us-gaap_LicenseAndServicesRevenue | 15,234,000 us-gaap_LicenseAndServicesRevenue |
Net proceeds from barter transactions | 4,428,000 us-gaap_AdvertisingBarterTransactionsAdvertisingBarterRevenue | 2,059,000 us-gaap_AdvertisingBarterTransactionsAdvertisingBarterRevenue | 7,472,000 us-gaap_AdvertisingBarterTransactionsAdvertisingBarterRevenue |
Barter transaction cost | 4,030,000 us-gaap_AdvertisingBarterTransactionsAdvertisingBarterCosts | 4,058,000 us-gaap_AdvertisingBarterTransactionsAdvertisingBarterCosts | 6,650,000 us-gaap_AdvertisingBarterTransactionsAdvertisingBarterCosts |
Business tax and surcharge on barter transactions | 266,000 xnet_BusinessTaxAndSurcharges | 124,000 xnet_BusinessTaxAndSurcharges | 426,000 xnet_BusinessTaxAndSurcharges |
Net gains from barter transactions | 1,556,000 xnet_AdvertisingBarterTransactionsAdvertisingBarterNetGains | 1,020,000 xnet_AdvertisingBarterTransactionsAdvertisingBarterNetGains | 4,666,000 xnet_AdvertisingBarterTransactionsAdvertisingBarterNetGains |
External advertising and market promotion expenses | 13,957,000 us-gaap_MarketingAndAdvertisingExpense | 12,247,000 us-gaap_MarketingAndAdvertisingExpense | 7,951,000 us-gaap_MarketingAndAdvertisingExpense |
Capitalization of software development costs |  |  |  |
Interest and penalties net of tax recognized | 0 us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense | 0 us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense | 0 us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense |
Value added tax on revenues | 17.00%xnet_ValueAddedTaxRate |  |  |
Value added tax on sub-licensing revenues | 6.00%xnet_ValueAddedTaxInCertainServiceRevenues |  |  |
Employee benefits cost | 3,818,000 us-gaap_DefinedBenefitPlanServiceCost | 3,243,000 us-gaap_DefinedBenefitPlanServiceCost | 1,930,000 us-gaap_DefinedBenefitPlanServiceCost |
Statutory general reserve rate | 10.00%xnet_StatutoryGeneralReserveRatePercentageOnNetIncome |  |  |
Statutory general reserve rate of registered capital | 50.00%xnet_StatutoryGeneralReserveFundAsPercentageOfRegisteredCapital |  |  |
Dividends declared | $ 0 us-gaap_CommonStockDividendsPerShareDeclared | $ 0 us-gaap_CommonStockDividendsPerShareDeclared | $ 0 us-gaap_CommonStockDividendsPerShareDeclared |
Minimum [Member] |  |  |  |
Accounting Policies and General Information [Line Items] |  |  |  |
Amortization percentage of intangible assets | 70.00%xnet_PercentageOfAmortizedCost / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |
Income tax examination higher limit | 3.00%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |
Maximum [Member] |  |  |  |
Accounting Policies and General Information [Line Items] |  |  |  |
Amortization percentage of intangible assets | 90.00%xnet_PercentageOfAmortizedCost / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |
Income tax examination higher limit | 5.00%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |
Content Copyrights [Member] |  |  |  |
Accounting Policies and General Information [Line Items] |  |  |  |
Impairment of intangible assets | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CopyrightsMember | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CopyrightsMember | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CopyrightsMember |
Online game licenses [Member] |  |  |  |
Accounting Policies and General Information [Line Items] |  |  |  |
Other intangible assets, amortization period | 3 years |  |  |
Impairment of intangible assets | $ 808,000 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = xnet_OnlineGameLicensesMember | $ 808,000 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = xnet_OnlineGameLicensesMember |  |
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 |  |  |

X
- Definition Total expense recognized from advertising barter transactions for each income statement presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406959&loc=d3e49171-111630 + Details
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