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Redeemable Convertible Preferred Shares - Assumptions to Estimated Fair Value of Warrants (Parenthetical) (Detail)	0 Months Ended
	Apr. 24, 2014	Mar. 05, 2014	Mar. 31, 2014
Subscription Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event	100.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember	100.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember
Series E Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event		100.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember
Series E Warrants [Member] | Convertible Redeemable Preferred Shares [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event		100.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemableConvertiblePreferredStockMember
Initial Public Offering [Member] | Subscription Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event	80.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember	80.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
Initial Public Offering [Member] | Series E Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event		80.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember	80.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
Initial Public Offering [Member] | Series E Warrants [Member] | Convertible Redeemable Preferred Shares [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event		80.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemableConvertiblePreferredStockMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
Liquidation Event [Member] | Subscription Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event	10.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_SubsidiarySaleOfStockAxis = xnet_LiquidationEventMember	10.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_SubsidiarySaleOfStockAxis = xnet_LiquidationEventMember
Liquidation Event [Member] | Series E Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event		10.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_SubsidiarySaleOfStockAxis = xnet_LiquidationEventMember	10.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_SubsidiarySaleOfStockAxis = xnet_LiquidationEventMember
Liquidation Event [Member] | Series E Warrants [Member] | Convertible Redeemable Preferred Shares [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event		10.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemableConvertiblePreferredStockMember / us-gaap_SubsidiarySaleOfStockAxis = xnet_LiquidationEventMember
Redemption Event [Member] | Subscription Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event	10.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_SubsidiarySaleOfStockAxis = xnet_RedemptionEventMember	10.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_SubsidiarySaleOfStockAxis = xnet_RedemptionEventMember
Redemption Event [Member] | Series E Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event		10.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_SubsidiarySaleOfStockAxis = xnet_RedemptionEventMember	10.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_SubsidiarySaleOfStockAxis = xnet_RedemptionEventMember
Redemption Event [Member] | Series E Warrants [Member] | Convertible Redeemable Preferred Shares [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Probability of occurrence of event		10.00%xnet_FairValueInputsProbabilityOfOccurrence / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemableConvertiblePreferredStockMember / us-gaap_SubsidiarySaleOfStockAxis = xnet_RedemptionEventMember

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