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

X

- Details

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

X

- 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

X

- 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

X

- 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