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Related Party Transactions - Schedule of Amount Due to from Related Party (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Schedule of Other Related Party Transactions [Line Items]      
Accounts payable to related party $ 84us-gaap_DueToRelatedPartiesCurrent $ 225us-gaap_DueToRelatedPartiesCurrent  
Long-term payable to related party 4,137us-gaap_DueToRelatedPartiesNoncurrent    
Accounts and other receivable from related party 22us-gaap_DueFromRelatedPartiesCurrent 85us-gaap_DueFromRelatedPartiesCurrent  
Zhuhai Qianyou [Member]      
Schedule of Other Related Party Transactions [Line Items]      
Accounts payable to related party 84us-gaap_DueToRelatedPartiesCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= xnet_ZhuhaiQianyouMember
225us-gaap_DueToRelatedPartiesCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= xnet_ZhuhaiQianyouMember
313us-gaap_DueToRelatedPartiesCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= xnet_ZhuhaiQianyouMember
Aiden & Jasmine Limited [Member]      
Schedule of Other Related Party Transactions [Line Items]      
Long-term payable to related party 1,125us-gaap_DueToRelatedPartiesNoncurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= xnet_AidenAndJasmineLimitedMember
   
Vantage Point Global Limited [Member]      
Schedule of Other Related Party Transactions [Line Items]      
Long-term payable to related party 3,012us-gaap_DueToRelatedPartiesNoncurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= xnet_VantagePointGlobalLimitedMember
   
Beijing Millet Technology Co., LTD [Member]      
Schedule of Other Related Party Transactions [Line Items]      
Accounts and other receivable from related party 5us-gaap_DueFromRelatedPartiesCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= xnet_BeijingMilletTechnologyMember
   
Hao Cheng [Member]      
Schedule of Other Related Party Transactions [Line Items]      
Accounts and other receivable from related party   85us-gaap_DueFromRelatedPartiesCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= xnet_HaoChengMember
 
Shenglong Zou [Member]      
Schedule of Other Related Party Transactions [Line Items]      
Accounts and other receivable from related party 10us-gaap_DueFromRelatedPartiesCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= xnet_ShenglongZouMember
   
Chuan Wang [Member]      
Schedule of Other Related Party Transactions [Line Items]      
Accounts and other receivable from related party $ 7us-gaap_DueFromRelatedPartiesCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= xnet_ChuanWangMember