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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 |  | $ 4.47 us-gaap_FairValueAssumptionsExercisePrice / us-gaap_StatementClassOfStockAxis = xnet_SeriesDWarrantsMember | $ 4.36 us-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 | 3.31 us-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 | 4.50 us-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 | 3.31 us-gaap_FairValueAssumptionsExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  | 3.39 us-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 | 4.65 us-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 | 4.65 us-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 | 4.65 us-gaap_FairValueAssumptionsExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = xnet_SubscriptionRightsMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  | 4.64 us-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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