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Redeemable Convertible Preferred Shares - Assumptions to Estimated Fair Value of Warrants (Detail) (USD $)	0 Months Ended		12 Months Ended	0 Months Ended	12 Months Ended
	Mar. 05, 2014	Feb. 06, 2014	Dec. 31, 2013	Apr. 24, 2014	Dec. 31, 2014
Series E Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Dividend yield	0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember
Series D Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Spot price		$ 4.47us-gaap_FairValueAssumptionsExercisePrice / us-gaap_StatementClassOfStockAxis = xnet_SeriesDWarrantsMember	$ 4.36us-gaap_FairValueAssumptionsExercisePrice / us-gaap_StatementClassOfStockAxis = xnet_SeriesDWarrantsMember
Risk-free interest rate		0.00%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_StatementClassOfStockAxis = xnet_SeriesDWarrantsMember	0.05%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_StatementClassOfStockAxis = xnet_SeriesDWarrantsMember
Volatility rate		0.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_StatementClassOfStockAxis = xnet_SeriesDWarrantsMember	30.33%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_StatementClassOfStockAxis = xnet_SeriesDWarrantsMember
Dividend yield		0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_StatementClassOfStockAxis = xnet_SeriesDWarrantsMember	0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_StatementClassOfStockAxis = xnet_SeriesDWarrantsMember
Convertible Redeemable Preferred Shares [Member] | Series E Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Risk-free interest rate	0.12%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemableConvertiblePreferredStockMember
Volatility rate	38.81%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemableConvertiblePreferredStockMember
Dividend yield	0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemableConvertiblePreferredStockMember
Subscription Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Risk-free interest rate	0.04%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember			0.02%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember
Volatility rate	38.12%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember			42.74%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember
Dividend yield	0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember			0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember
Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Volatility rate					55.36%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_RangeAxis = us-gaap_MinimumMember
Minimum [Member] | Series E Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Spot price	3.31us-gaap_FairValueAssumptionsExercisePrice / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember
Risk-free interest rate	0.04%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember
Volatility rate	38.39%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember
Dividend yield	0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember
Minimum [Member] | Convertible Redeemable Preferred Shares [Member] | Series E Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Spot price	4.50us-gaap_FairValueAssumptionsExercisePrice / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemableConvertiblePreferredStockMember
Dividend yield	0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemableConvertiblePreferredStockMember
Minimum [Member] | Subscription Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Spot price	3.31us-gaap_FairValueAssumptionsExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_RangeAxis = us-gaap_MinimumMember			3.39us-gaap_FairValueAssumptionsExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Dividend yield	0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_RangeAxis = us-gaap_MinimumMember			0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Volatility rate					59.91%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_RangeAxis = us-gaap_MaximumMember
Maximum [Member] | Series E Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Spot price	4.65us-gaap_FairValueAssumptionsExercisePrice / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember
Risk-free interest rate	0.12%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember
Volatility rate	38.81%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember
Dividend yield	0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember
Maximum [Member] | Convertible Redeemable Preferred Shares [Member] | Series E Warrants [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Spot price	4.65us-gaap_FairValueAssumptionsExercisePrice / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemableConvertiblePreferredStockMember
Dividend yield	0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementClassOfStockAxis = xnet_SeriesEWarrantsMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RedeemableConvertiblePreferredStockMember
Maximum [Member] | Subscription Rights [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Spot price	4.65us-gaap_FairValueAssumptionsExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_RangeAxis = us-gaap_MaximumMember			4.64us-gaap_FairValueAssumptionsExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Dividend yield	0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_RangeAxis = us-gaap_MaximumMember			0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_RangeAxis = us-gaap_MaximumMember

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Agreed upon price for the exchange of the underlying asset.

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Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

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Risk-free interest rate assumption used in valuing an instrument.

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