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Deferred Revenue and Income - Schedule of Deferred Revenue and Income (Parenthetical) (Detail) (USD $)	1 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Deferred Revenue Arrangement [Line Items]
Reimbursement received from depository	$ 1,200,000xnet_ProceedsFromReimbursementOfInitialPublicOfferingExpenses	$ 1,158,000xnet_ProceedsFromReimbursementOfInitialPublicOfferingExpenses
Deferred income withholding tax	300,000xnet_WithholdingTaxForReimbursementFromDepository
Deferred income amortized depositary service period	5 years
Deferred revenue and income, non-current	7,294,000us-gaap_DeferredRevenueNoncurrent	7,294,000us-gaap_DeferredRevenueNoncurrent	9,190,000us-gaap_DeferredRevenueNoncurrent
Membership subscription revenues [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue and income, non-current	1,121,000us-gaap_DeferredRevenueNoncurrent / us-gaap_DeferredRevenueArrangementTypeAxis = xnet_MembershipSubscriptionRevenuesMember	1,121,000us-gaap_DeferredRevenueNoncurrent / us-gaap_DeferredRevenueArrangementTypeAxis = xnet_MembershipSubscriptionRevenuesMember	2,610,000us-gaap_DeferredRevenueNoncurrent / us-gaap_DeferredRevenueArrangementTypeAxis = xnet_MembershipSubscriptionRevenuesMember
Government grants [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue and income, non-current	5,331,000us-gaap_DeferredRevenueNoncurrent / us-gaap_DeferredRevenueArrangementTypeAxis = xnet_GovernmentGrantMember	5,331,000us-gaap_DeferredRevenueNoncurrent / us-gaap_DeferredRevenueArrangementTypeAxis = xnet_GovernmentGrantMember	6,580,000us-gaap_DeferredRevenueNoncurrent / us-gaap_DeferredRevenueArrangementTypeAxis = xnet_GovernmentGrantMember
Reimbursement from the depository [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue and income, non-current	$ 842,000us-gaap_DeferredRevenueNoncurrent / us-gaap_DeferredRevenueArrangementTypeAxis = xnet_ReimbursementFromDepositoryMember	$ 842,000us-gaap_DeferredRevenueNoncurrent / us-gaap_DeferredRevenueArrangementTypeAxis = xnet_ReimbursementFromDepositoryMember

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- Details

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- Definition

The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 13.A.4(a).Q1)

-URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 8

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 13

-Section A

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- Definition

Deferred income amortization period for reimbursement from depository.

+ References

No definition available.

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- Definition

Proceeds from reimbursement of initial public offering expenses.

+ References

No definition available.

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- Definition

Withholding tax for reimbursement from depository.

+ References

No definition available.

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