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Organization and Nature of Operations - Additional Information (Detail) | 0 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended |  | 12 Months Ended | 0 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended
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Jan. 21, 2011 | Nov. 30, 2014 | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Jun. 24, 2014 American Depository Shares (ADSs) [Member] USD ($) | Dec. 31, 2014 American Depository Shares (ADSs) [Member] | Jun. 24, 2014 American Depository Shares (ADSs) [Member] | Dec. 31, 2014 Exclusive Technology Support and Services Agreement [Member] | Dec. 31, 2014 Exclusive Technology Consulting and Training Agreement [Member] | Dec. 31, 2014 Software and Proprietary Technology License Contract [Member] | Dec. 31, 2014 Giganology (Shenzhen) Co. Ltd [Member] | Dec. 31, 2014 Giganology (Shenzhen) Co. Ltd [Member] Exclusive Technology Support and Services Agreement [Member] | Dec. 31, 2014 Giganology (Shenzhen) Co. Ltd [Member] Exclusive Technology Consulting and Training Agreement [Member] | Dec. 24, 2013 Shenzhen Xunlei and Xunlei Computer [Member] | Dec. 31, 2014 Agreement between Giganology Shenzhen and Mr. Sean Shenglong Zou [Member] CNY | Dec. 31, 2014 Agreement between Giganology Shenzhen and Shareholders of Shenzhen Xunlei [Member] CNY | May 31, 2011 Agreement between Giganology Shenzhen and Shenzhen Xunlei [Member] CNY | Dec. 31, 2014 Agreement between Giganology Shenzhen and Shenzhen Xunlei [Member] | Dec. 31, 2014 Call Option Agreement [Member] Giganology (Shenzhen) Co. Ltd [Member] CNY
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of incorporation |  |  | Feb. 03, 2005 |  |  |  |  |  |  |  |  | Jun. 30, 2005 |  |  |  |  |  |  |  |
Interest-free loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,000,000 xnet_LoansReceivableInterestFree / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_AgreementBetweenGiganologyShenzhenAndShareholdersOfShenzhenXunleiMember |  |  |
Agreement term years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 years | 2 years |  |  |
Loan agreements description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | The term of this agreement last for two years from the date it was signed, and will be automatically extended afterwards on a yearly basis until Mr. Zou has repaid the loan in its entirety in accordance with the loan agreement. | The term of these agreements last for two years from the date it was signed, and will be automatically extended afterwards on a yearly basis until each shareholder of Shenzhen Xunlei has repaid the loans in its entirety in accordance with the loan agreement. |  |  |
Additional interest-free loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20,000,000 xnet_AdditionalLoansReceivableInterestFree / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_AgreementBetweenGiganologyShenzhenAndMrSeanShenglongZouMember |  |  |  |
Increase in registered capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30,000,000 xnet_IncreaseDecreaseRegisteredCapital / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_AgreementBetweenGiganologyShenzhenAndMrSeanShenglongZouMember |  | 20,000,000 xnet_IncreaseDecreaseRegisteredCapital / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_AgreementBetweenGiganologyShenzhenAndShenzhenXunleiMember |  |
Term agreement expiration year |  |  |  |  |  |  |  |  |  |  |  |  | 2025 | 2025 |  |  |  |  | 2016 |
Number of year's power of attorney retained |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of pre-tax operating profit |  |  | 80.00%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent |  |  |  |  |  | 20.00%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = xnet_ExclusiveTechnologySupportAndServicesAgreementMember | 20.00%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = xnet_ExclusiveTechnologyConsultingAndTrainingAgreementMember | 40.00%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = xnet_SoftwareAndProprietaryTechnologyLicenseContractMember |  |  |  |  |  |  |  |  |
Service fees payable |  |  | 1,228,000 us-gaap_ServicingFees |  | 1,494,000 us-gaap_ServicingFees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Termination of agreement, notice period |  |  |  |  |  |  |  |  |  |  |  | 30 days |  |  |  |  |  |  |  |
Automated extended period of agreement |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |
Agreement expiration date |  |  |  |  |  |  |  |  |  |  |  | 2022 |  |  |  |  |  |  |  | 2022
Outstanding share, purchase price per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 us-gaap_SharePrice / dei_LegalEntityAxis = xnet_GiganologyShenzhenCoLtdMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = xnet_CallOptionAgreementMember
License agreement, term |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |
Common shares stock split, conversion ratio | 4 us-gaap_StockholdersEquityNoteStockSplitConversionRatio1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of completion of IPO |  |  | Jun. 24, 2014 |  |  |  | Jun. 24, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of securities issued |  | 10,000,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues |  |  |  | 8,412,250 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_SubsidiarySaleOfStockAxis = xnet_AmericanDepositorySharesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares equivalent to each ADS |  |  |  |  |  |  |  | 5 dei_EntityListingDepositoryReceiptRatio / us-gaap_SubsidiarySaleOfStockAxis = xnet_AmericanDepositorySharesMember |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds received from IPO |  |  | $ 93,881,000 us-gaap_ProceedsFromIssuanceInitialPublicOffering |  |  | $ 89,665,000 us-gaap_ProceedsFromIssuanceInitialPublicOffering / us-gaap_SubsidiarySaleOfStockAxis = xnet_AmericanDepositorySharesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |

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