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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 |  | 43 xnet_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
Name: | us-gaap_DeferredTaxAssetsValuationAllowance
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