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Note 5 - Accounts Receivable, Net (Details) - Accounts Receivable, Net (USD $)
Mar. 31, 2015
Dec. 31, 2014
Note 5 - Accounts Receivable, Net (Details) - Accounts Receivable, Net [Line Items]    
Accounts receivable $ 5,450,000us-gaap_AccountsReceivableGrossCurrent $ 5,429,000us-gaap_AccountsReceivableGrossCurrent
Accounts receivable, net 2,660,000us-gaap_AccountsReceivableNetCurrent 2,407,000us-gaap_AccountsReceivableNetCurrent
Internet Advertising and TV Advertising [Member]    
Note 5 - Accounts Receivable, Net (Details) - Accounts Receivable, Net [Line Items]    
Allowance for doubtful accounts $ (2,790,000)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ us-gaap_StatementBusinessSegmentsAxis
= cnet_InternetAdvertisingAndTVAdvertisingMember
$ (3,022,000)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ us-gaap_StatementBusinessSegmentsAxis
= cnet_InternetAdvertisingAndTVAdvertisingMember