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Long-Term Investments - Schedule of Equity Investments, Percentage of Ownership of Common Share (Parenthetical) (Detail)	12 Months Ended	1 Months Ended				1 Months Ended
	Dec. 31, 2014 USD ($) Companies	Apr. 30, 2014 Guangzhou Yuechuan [Member] USD ($)	Apr. 30, 2014 Guangzhou Yuechuan [Member] CNY	Dec. 31, 2014 Guangzhou Yuechuan [Member]	Dec. 31, 2013 Guangzhou Yuechuan [Member]	May 31, 2014 Chengdu Diting [Member] USD ($)	May 31, 2014 Chengdu Diting [Member] CNY	Dec. 31, 2014 Chengdu Diting [Member]	Dec. 31, 2013 Chengdu Diting [Member]
Schedule of Equity Method Investments [Line Items]
Number of equity investments	4xnet_NumberOfEquityMethodInvestees
Consideration received by equity method investee		$ 2,928,000us-gaap_SaleOfStockConsiderationReceivedPerTransaction / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_GuangzhouYuechuanMember	18,000,000us-gaap_SaleOfStockConsiderationReceivedPerTransaction / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_GuangzhouYuechuanMember			$ 1,627,000us-gaap_SaleOfStockConsiderationReceivedPerTransaction / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_ChengduDitingMember	10,000,000us-gaap_SaleOfStockConsiderationReceivedPerTransaction / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_ChengduDitingMember
Equity method investments, Percentage of ownership of common share				19.13%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_GuangzhouYuechuanMember	23.44%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_GuangzhouYuechuanMember			16.58%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_ChengduDitingMember	19.90%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_ChengduDitingMember
Diluted gain arising from sale of shares	$ 449,000us-gaap_EquityMethodInvestmentDeferredGainOnSale	$ 298,000us-gaap_EquityMethodInvestmentDeferredGainOnSale / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_GuangzhouYuechuanMember	1,800,000us-gaap_EquityMethodInvestmentDeferredGainOnSale / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_GuangzhouYuechuanMember			$ 151,000us-gaap_EquityMethodInvestmentDeferredGainOnSale / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_ChengduDitingMember	900,000us-gaap_EquityMethodInvestmentDeferredGainOnSale / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_ChengduDitingMember
Equity method investment application description	As of December 31, 2013, the investment in Chengdu Diting was accounted for under the cost method due to the fact that the Group did not have significant influence in this company. In May of 2014, the Group obtained the right to appoint a director to Chengdu Diting and thus had one out of five seats on the board of directors of this investee. Given the existence of significant influence; the Group started to apply equity method in May 2014. The investment, results of operations (current and prior periods presented), and retained earnings of the Group have been adjusted retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods in which the investment was held.

X

- Definition

This serves as a place to record data that is not required by accounting literature but is useful for readers of the financial statements as it relates to the details of an equity method investment in common stock. Such information may include the amount of change for a change in ownership (equity) percentage in a given period and the amount and type of the consideration given or received in relation to the change in ownership.

+ References

No definition available.

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- Definition

This element represents disclosure of the amount of gain which has been deferred as the result of the sale of a business or operating assets to a highly leveraged entity which deferred gain has been reflected in the accompanying statement of financial position as reduction from the related asset.

+ References

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section U



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 40

-Section S99

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6955272&loc=d3e221323-122791

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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- Definition

Amount of consideration received by subsidiary or equity investee in exchange for shares of stock issued or sold. Includes amount of cash received, fair value of noncash assets received, and fair value of liabilities assumed by the investor.

+ References

No definition available.

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- Definition

Number of equity method investees.

+ References

No definition available.

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