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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
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                                 9,000,000xnet_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                               20,000,000xnet_AdditionalLoansReceivableInterestFree
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= xnet_AgreementBetweenGiganologyShenzhenAndMrSeanShenglongZouMember		        
Increase in registered capital                               30,000,000xnet_IncreaseDecreaseRegisteredCapital
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= xnet_AgreementBetweenGiganologyShenzhenAndMrSeanShenglongZouMember		   20,000,000xnet_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     1,228,000us-gaap_ServicingFees    1,494,000us-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                                       1us-gaap_SharePrice
/ dei_LegalEntityAxis
= xnet_GiganologyShenzhenCoLtdMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= xnet_CallOptionAgreementMember
License agreement, term                             2 years          
Common shares stock split, conversion ratio 4us-gaap_StockholdersEquityNoteStockSplitConversionRatio1                                      
Date of completion of IPO     Jun. 24, 2014       Jun. 24, 2014                          
Number of securities issued   10,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues       8,412,250us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_SubsidiarySaleOfStockAxis
= xnet_AmericanDepositorySharesMember		                            
Number of shares equivalent to each ADS               5dei_EntityListingDepositoryReceiptRatio
/ us-gaap_SubsidiarySaleOfStockAxis
= xnet_AmericanDepositorySharesMember		                        
Net proceeds received from IPO     $ 93,881,000us-gaap_ProceedsFromIssuanceInitialPublicOffering     $ 89,665,000us-gaap_ProceedsFromIssuanceInitialPublicOffering
/ us-gaap_SubsidiarySaleOfStockAxis
= xnet_AmericanDepositorySharesMember