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Prepayments and Other Assets - Schedule of Prepayments and Other Assets (Parenthetical) (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Low-interest employee loan repayable period | 10 years
Share repurchase program amount | $ 20,000,000 us-gaap_StockRepurchaseProgramAuthorizedAmount1
Prepaid amount to security broker | $ 1,000,000 xnet_PrepaymentForShareRepurchasePlan

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- Details
Name: | us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Employee loan repayable period. + References No definition available. + Details
Name: | xnet_EmployeeLoanRepayablePeriod
Namespace Prefix: | xnet_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Prepayment for share repurchase plan. + References No definition available. + Details
Name: | xnet_PrepaymentForShareRepurchasePlan
Namespace Prefix: | xnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant