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Note 5 - Accounts Receivable, Net (Details) (Internet Advertising and TV Advertising [Member], USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Internet Advertising and TV Advertising [Member] |  |  |
Note 5 - Accounts Receivable, Net (Details) [Line Items] |  |  |
Allowance for Doubtful Accounts Receivable, Current | $ 2,790,000 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent / us-gaap_StatementBusinessSegmentsAxis = cnet_InternetAdvertisingAndTVAdvertisingMember |  | $ 3,022,000 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent / us-gaap_StatementBusinessSegmentsAxis = cnet_InternetAdvertisingAndTVAdvertisingMember
Number of Months Past Due | 6 months |  |
Provision for Doubtful Accounts, Reversal | $ 220,000 cnet_ProvisionForDoubtfulAccountsReversal / us-gaap_StatementBusinessSegmentsAxis = cnet_InternetAdvertisingAndTVAdvertisingMember | $ 0 cnet_ProvisionForDoubtfulAccountsReversal / us-gaap_StatementBusinessSegmentsAxis = cnet_InternetAdvertisingAndTVAdvertisingMember |

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- Definition Reflected the number of months past due of the proportion of accounts receivable which allowance for doubtful debts has been provided. + References No definition available. + Details
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- Definition Represents a reversal in the allowance for doubtful accounts. + References No definition available. + Details
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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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