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Taxation - Schedule of Movement of Valuation Allowance (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Beginning balance		$ (43)us-gaap_DeferredTaxAssetsValuationAllowance	$ (37)us-gaap_DeferredTaxAssetsValuationAllowance
Additions	(291)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount		(6)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Write-off		43xnet_ValuationAllowanceDeferredTaxAssetWriteOff
Ending balance	$ (291)us-gaap_DeferredTaxAssetsValuationAllowance		$ (43)us-gaap_DeferredTaxAssetsValuationAllowance

X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

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

X

- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 45

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e32123-109318

+ Details

Name:	us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of write-off in the valuation allowance for a specified deferred tax asset.

+ References

No definition available.

+ Details

Name:	xnet_ValuationAllowanceDeferredTaxAssetWriteOff
Namespace Prefix:	xnet_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration