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Deferred Revenue and Income - Schedule of Deferred Revenue and Income (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Deferred Revenue Arrangement [Line Items]    
Deferred revenue and income, Total $ 35,588us-gaap_DeferredRevenue $ 38,542us-gaap_DeferredRevenue
Less: non-current portion (7,294)us-gaap_DeferredRevenueNoncurrent (9,190)us-gaap_DeferredRevenueNoncurrent
Deferred revenue and income, current portion 28,294us-gaap_DeferredRevenueCurrent 29,352us-gaap_DeferredRevenueCurrent
Membership subscription revenues [Member]    
Deferred Revenue Arrangement [Line Items]    
Deferred revenue and income, Total 27,543us-gaap_DeferredRevenue
/ us-gaap_DeferredRevenueArrangementTypeAxis
= xnet_MembershipSubscriptionRevenuesMember
30,051us-gaap_DeferredRevenue
/ us-gaap_DeferredRevenueArrangementTypeAxis
= xnet_MembershipSubscriptionRevenuesMember
Less: non-current portion (1,121)us-gaap_DeferredRevenueNoncurrent
/ us-gaap_DeferredRevenueArrangementTypeAxis
= xnet_MembershipSubscriptionRevenuesMember
(2,610)us-gaap_DeferredRevenueNoncurrent
/ us-gaap_DeferredRevenueArrangementTypeAxis
= xnet_MembershipSubscriptionRevenuesMember
Online game revenues [Member]    
Deferred Revenue Arrangement [Line Items]    
Deferred revenue and income, Total 1,111us-gaap_DeferredRevenue
/ us-gaap_DeferredRevenueArrangementTypeAxis
= xnet_OnlineGameRevenuesMember
1,650us-gaap_DeferredRevenue
/ us-gaap_DeferredRevenueArrangementTypeAxis
= xnet_OnlineGameRevenuesMember
Pay per view subscription revenues [Member]    
Deferred Revenue Arrangement [Line Items]    
Deferred revenue and income, Total 550us-gaap_DeferredRevenue
/ us-gaap_DeferredRevenueArrangementTypeAxis
= xnet_PayPerViewSubscriptionRevenuesMember
261us-gaap_DeferredRevenue
/ us-gaap_DeferredRevenueArrangementTypeAxis
= xnet_PayPerViewSubscriptionRevenuesMember
Government grants [Member]    
Deferred Revenue Arrangement [Line Items]    
Deferred revenue and income, Total 5,331us-gaap_DeferredRevenue
/ us-gaap_DeferredRevenueArrangementTypeAxis
= xnet_GovernmentGrantMember
6,580us-gaap_DeferredRevenue
/ us-gaap_DeferredRevenueArrangementTypeAxis
= xnet_GovernmentGrantMember
Less: non-current portion (5,331)us-gaap_DeferredRevenueNoncurrent
/ us-gaap_DeferredRevenueArrangementTypeAxis
= xnet_GovernmentGrantMember
(6,580)us-gaap_DeferredRevenueNoncurrent
/ us-gaap_DeferredRevenueArrangementTypeAxis
= xnet_GovernmentGrantMember
Reimbursement from the depository [Member]    
Deferred Revenue Arrangement [Line Items]    
Deferred revenue and income, Total 1,053us-gaap_DeferredRevenue
/ us-gaap_DeferredRevenueArrangementTypeAxis
= xnet_ReimbursementFromDepositoryMember
 
Less: non-current portion $ (842)us-gaap_DeferredRevenueNoncurrent
/ us-gaap_DeferredRevenueArrangementTypeAxis
= xnet_ReimbursementFromDepositoryMember