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Share-Based Compensation - Additional Information (Detail) (USD $)	0 Months Ended	1 Months Ended	12 Months Ended		1 Months Ended		0 Months Ended		12 Months Ended
	Dec. 01, 2014	Nov. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Apr. 30, 2014	Nov. 30, 2013	Sep. 05, 2014	Jun. 11, 2014	Dec. 31, 2012	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental share-based compensation to be recognized	$ 2,214,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost
Share options cancelled	3,776,711xnet_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsConvertedAndCancelled		3,776,711xnet_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsConvertedAndCancelled
Common shares issued		10,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
Total fair value, share options vested			7,923,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	6,271,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
Unrecognized share-based compensation costs			1,462,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	2,803,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
Weighted-average vesting period expected to be recognized			2 years 10 months 2 days	2 years 7 months 28 days
Restricted shares expected to vest			9,642,307us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	20,701,286us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
Leading Advice Holdings Limited [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares issued					14,195,412us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_LeadingAdviceHoldingsLimitedMember	9,073,732us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_LeadingAdviceHoldingsLimitedMember
Restricted shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted	1,505,787xnet_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOptionsConvertedAndOtherThanOptionsGrantedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember
Kingsoft Cloud Storage Business [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Business acquisition date			Sep. 05, 2014
Replacement award attributable to pre-combination service							303,000us-gaap_BusinessCombinationConsiderationTransferredIncludingEquityInterestInAcquireeHeldPriorToCombination1 / us-gaap_BusinessAcquisitionAxis = xnet_KingsoftCloudStorageBusinessMember
Replacement award attributable to post-combination service							44,000xnet_BusinessCombinationConsiderationTransferredIncludingEquityInterestInAcquireeHeldPostCombination / us-gaap_BusinessAcquisitionAxis = xnet_KingsoftCloudStorageBusinessMember
2010 share incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period, description			Stock options granted to employees and officers vest over a four-year schedule as stated below: (1) One-fourth of the options shall be vested upon the first anniversary of the grant date; (2) The remaining three quarters of the options shall be vested on monthly basis over the next thirty-six months. ( 1⁄48 of options shall be vested per month subsequently)
Number of shares available for grant			8,043,115us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = us-gaap_StockCompensationPlanMember
Extended maturity date of share options			Jun. 11, 2015
Lock-up period for shares from IPO closing date			6 months
Incremental share-based compensation to be recognized								768us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost / us-gaap_PlanNameAxis = us-gaap_StockCompensationPlanMember
2010 share incentive plan [Member] | Non-employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted			0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_PlanNameAxis = us-gaap_StockCompensationPlanMember / us-gaap_TitleOfIndividualAxis = xnet_NonEmployeesMember	0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_PlanNameAxis = us-gaap_StockCompensationPlanMember / us-gaap_TitleOfIndividualAxis = xnet_NonEmployeesMember					0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_PlanNameAxis = us-gaap_StockCompensationPlanMember / us-gaap_TitleOfIndividualAxis = xnet_NonEmployeesMember
2010 share incentive plan [Member] | Employee and officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period			4 years
2010 share incentive plan [Member] | Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period			32 months
2010 share incentive plan [Member] | Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated forfeiture rate			20.00%xnet_ShareBasedCompensationArrangementByShareBasedPaymentAwardEstimatedForfeitureRate / us-gaap_PlanNameAxis = us-gaap_StockCompensationPlanMember / us-gaap_TitleOfIndividualAxis = xnet_EmployeeMember
2010 share incentive plan [Member] | Directors and advisers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated forfeiture rate
2010 share incentive plan [Member] | Restricted shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted			1,505,787xnet_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOptionsConvertedAndOtherThanOptionsGrantedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = us-gaap_StockCompensationPlanMember
2010 share incentive plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option term			7 years
Stock option vesting period	2 years
2010 share incentive plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option term			10 years
Stock option vesting period	4 years 6 months
Number of shares available for grant										26,822,828us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = us-gaap_StockCompensationPlanMember / us-gaap_RangeAxis = us-gaap_MaximumMember
2013 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted			8,764,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = xnet_TwoThousandAndThirteenPlanMember
Unrecognized compensation expense relating to the restricted shares			20,058,000xnet_UnrecognizedShareBasedCompensationExpenses / us-gaap_PlanNameAxis = xnet_TwoThousandAndThirteenPlanMember
2013 Plan [Member] | Non-employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares issued to non-employees			0us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_PlanNameAxis = xnet_TwoThousandAndThirteenPlanMember / us-gaap_TitleOfIndividualAxis = xnet_NonEmployeesMember
2013 Plan [Member] | Restricted shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant			9,073,732us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = xnet_TwoThousandAndThirteenPlanMember
Restricted stock granted			4,233,558us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = xnet_TwoThousandAndThirteenPlanMember	8,095,238us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = xnet_TwoThousandAndThirteenPlanMember
2013 Plan [Member] | Restricted shares [Member] | Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period			4 years
Stock option vesting period, description			One-fourth of the restricted shares shall be vested upon the first, second, third, and fourth anniversary of the grant date, respectively.
Restricted shares expected to vest			6,285,737us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = xnet_TwoThousandAndThirteenPlanMember / us-gaap_VestingAxis = us-gaap_ShareBasedCompensationAwardTrancheOneMember
2013 Plan [Member] | Restricted shares [Member] | Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period			5 years
Stock option vesting period, description			One-fifth of the restricted shares shall be vested upon the first, second, third, fourth and fifth anniversary of the grant date, respectively.
Restricted shares expected to vest			1,383,858us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = xnet_TwoThousandAndThirteenPlanMember / us-gaap_VestingAxis = us-gaap_ShareBasedCompensationAwardTrancheTwoMember
2013 Plan [Member] | Restricted shares [Member] | Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period			1 year
Stock option vesting period, description			One-fourth of the restricted shares shall be vested upon the end of each quarter since the grant date.
Restricted shares expected to vest			60,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = xnet_TwoThousandAndThirteenPlanMember / us-gaap_VestingAxis = us-gaap_ShareBasedCompensationAwardTrancheThreeMember
2013 Plan [Member] | Restricted shares [Member] | Tranche Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period			1 month
Stock option vesting period, description			One month since the grant date.
Restricted shares expected to vest			180,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = xnet_TwoThousandAndThirteenPlanMember / us-gaap_VestingAxis = xnet_SharebasedCompensationAwardTrancheFourMember
2013 Plan [Member] | Restricted shares [Member] | Tranche Five [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period			4 years
Stock option vesting period, description			(i) One-fourth of the restricted shares shall vest on the earlier of (i) the first anniversary of the grant date, or (ii) upon a QIPO; and (ii) the remainder three quarters of the restricted shares shall vest in equal instalments on a monthly basis over a thirty-six month vesting period afterwards.
Restricted shares expected to vest			854,405us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = xnet_TwoThousandAndThirteenPlanMember / us-gaap_VestingAxis = xnet_SharebasedCompensationAwardTrancheFiveMember
2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant					14,195,412us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = xnet_TwoThousandFourteenShareIncentivePlanMember
Unrecognized compensation expense relating to the restricted shares			$ 6,713,000xnet_UnrecognizedShareBasedCompensationExpenses / us-gaap_PlanNameAxis = xnet_TwoThousandFourteenShareIncentivePlanMember
2014 Plan [Member] | Non-employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares issued to non-employees			0us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_PlanNameAxis = xnet_TwoThousandFourteenShareIncentivePlanMember / us-gaap_TitleOfIndividualAxis = xnet_NonEmployeesMember
2014 Plan [Member] | Leading Advice Holdings Limited [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares issued			14,195,412us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_PlanNameAxis = xnet_TwoThousandFourteenShareIncentivePlanMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_LeadingAdviceHoldingsLimitedMember
2014 Plan [Member] | Restricted shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted			3,896,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = xnet_TwoThousandFourteenShareIncentivePlanMember
2014 Plan [Member] | Restricted shares [Member] | Certain Officers and Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted			3,896,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = xnet_TwoThousandFourteenShareIncentivePlanMember / us-gaap_TitleOfIndividualAxis = xnet_OfficersAndEmployeesMember
2014 Plan [Member] | Restricted shares [Member] | Tranche One [Member] | Certain Officers and Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period			5 years
Stock option vesting period, description			2,096,500 of these restricted shares will vest over a five-year schedule in which one-fifth of the restricted shares shall be vested upon the first, second, third, fourth and fifth anniversary of the grant date, respectively.
Restricted shares expected to vest			2,096,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = xnet_TwoThousandFourteenShareIncentivePlanMember / us-gaap_TitleOfIndividualAxis = xnet_OfficersAndEmployeesMember / us-gaap_VestingAxis = us-gaap_ShareBasedCompensationAwardTrancheOneMember
2014 Plan [Member] | Restricted shares [Member] | Tranche Two [Member] | Certain Officers and Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period			4 years
Stock option vesting period, description			The remaining 1,800,000 restricted shares will vest over a four-year schedule in which one-fourth of the restricted shares shall be vested upon the first, second, third and fourth anniversary of the grant date, respectively.
Restricted shares expected to vest			1,800,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = xnet_TwoThousandFourteenShareIncentivePlanMember / us-gaap_TitleOfIndividualAxis = xnet_OfficersAndEmployeesMember / us-gaap_VestingAxis = us-gaap_ShareBasedCompensationAwardTrancheTwoMember

X

- Definition

Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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Fair value at acquisition-date of the assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interests issued by the acquirer, including but not limited to, instruments or interests issued or issuable in consideration for the business combination.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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No definition available.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Date the equity-based award expires, in CCYY-MM-DD format.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Net number of share options (or share units) granted during the period.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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- Definition

An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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