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Note 22 - Concentration of risk (Detail) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2012
Number of Major Customers | 1 | 3 |
Percent of Accounts Receivables | 11.00% |  | 10.00%
Number of Major Suppliers | 2 | 2 |
Customer 1 [Member] |  |  |
Entity-Wide Revenue, Major Customer, Percentage | 10.00% |  |
No Customers [Member] | Maximum [Member] |  |  |
Entity-Wide Revenue, Major Customer, Percentage | 10.00% | 10.00% |
Customer 1 [Member] |  |  |
Concentration Risk, Percentage |  | 25.00% |
Customer 2 [Member] |  |  |
Concentration Risk, Percentage |  | 20.00% |
Customer 3 [Member] |  |  |
Concentration Risk, Percentage |  | 17.00% |
Accounts Receivables [Member] |  |  |
Number of Major Customers | 2 |  | 1
Supplier 1 [Member] |  |  |
Concentration Risk, Supplier | 47% | 65% |
Supplier 2 [Member] |  |  |
Concentration Risk, Supplier | 24% | 17% |
Maximum [Member] |  |  |
Entity-Wide Revenue, Major Customer, Percentage | 10.00% |  | 10.00%
Concentration Risk, Supplier | 10% | 10% |

X
- Definition Number of customers that accounted for 10% or more of the Company's sales for each of the reporting period or accounted for 10% or more of the Company's accounts receivables as of each of the reporting date. + References No definition available. + Details
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Namespace Prefix: | cnet_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of suppliers that accounted for 10% or more of the Company's cost of sales for each of the reporting period. + References No definition available. + Details
Name: | cnet_NumberOfMajorSuppliers
Namespace Prefix: | cnet_
Data Type: | xbrli:integerItemType
Balance Type: | na
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X
- Definition Percentage of accounts receivable due from a single external customer that accounts for 10 percent or more of an entity's accounts receivable. + References No definition available. + Details
Name: | cnet_PercentOfAccountsReceivables
Namespace Prefix: | cnet_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611 + Details
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X
- Definition Description of risks that arise due to the volume of business transacted with a particular supplier or reliance placed on that supplier. At a minimum, the description informs financial statement users of the general nature of the risk. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 94-6 -Paragraph 21, 22, 24, 27 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6374342&loc=d3e7102-108593 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6327-108592 + Details
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Balance Type: | na
Period Type: | duration

X
- Definition Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration