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Note 6 - Accounts receivable, net (Detail) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2013 | Dec. 31, 2012
Allowance for Doubtful Accounts Receivable, Current (in Dollars) | $ 3,650,000 | $ 3,630,000
Number of Months Past Due | 6 months |
Internet Advertising And TV Advertising [Member] |  |
Allowance for Doubtful Accounts Receivable, Current (in Dollars) | $ 3,650,000 |

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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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Namespace Prefix: | cnet_
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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 FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5074-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 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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Balance Type: | credit
Period Type: | instant