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Note 7 - Prepayments and Deposit to Suppliers (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Note 7 - Prepayments and Deposit to Suppliers (Details) [Line Items]    
Prepayment And Deposit To Suppliers $ 10,235cnet_PrepaymentAndDepositToSuppliers $ 8,092cnet_PrepaymentAndDepositToSuppliers
Number of Largest Internet Resources Suppliers 2cnet_NumberOfLargestInternetResourcesSuppliers  
Two Largest Internet Resources Suppliers [Member]    
Note 7 - Prepayments and Deposit to Suppliers (Details) [Line Items]    
Prepayment And Deposit To Suppliers 3,600cnet_PrepaymentAndDepositToSuppliers
/ us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis
= cnet_TwoLargestInternetResourcesSuppliersMember		  
TV Advertising Time Supplier [Member]    
Note 7 - Prepayments and Deposit to Suppliers (Details) [Line Items]    
Prepayment And Deposit To Suppliers 800cnet_PrepaymentAndDepositToSuppliers
/ us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis
= cnet_TVAdvertisingTimeSupplierMember		  
Internet Resources Suppliers Prepayment [Member]    
Note 7 - Prepayments and Deposit to Suppliers (Details) [Line Items]    
Prepayment And Deposit To Suppliers 3,800cnet_PrepaymentAndDepositToSuppliers
/ us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis
= cnet_InternetResourcesSuppliersPrepaymentMember		  
Number of Years TV Station Partnered with Company 5 years  
Purchasing TV Time Slots [Member]    
Note 7 - Prepayments and Deposit to Suppliers (Details) [Line Items]    
Prepayment And Deposit To Suppliers $ 2,000cnet_PrepaymentAndDepositToSuppliers
/ us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis
= cnet_PurchasingTVTimeSlotsMember