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Long-term Investment (Detail) | Dec. 31, 2011 USD ($) | Dec. 31, 2011 CNY | Dec. 31, 2010 CNY | Dec. 31, 2011 Shanghai Ruichuang Network Technology Co Ltd USD ($) | Dec. 31, 2011 Shanghai Ruichuang Network Technology Co Ltd CNY | Dec. 31, 2010 Shanghai Ruichuang Network Technology Co Ltd CNY | Nov. 18, 2010 Shanghai Ruichuang Network Technology Co Ltd CNY | Dec. 31, 2011 Beijing Innovation Works Development Fund USD ($) | Dec. 31, 2011 Beijing Innovation Works Development Fund CNY
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Schedule of Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term investment | $ 4,686,322 | 29,495,239 | 20,495,239 | $ 3,256,366 | [1] | 20,495,239 | [1] | 20,495,239 | [1] | 20,495,239 | $ 1,429,956 | 9,000,000
[1] | On November 18, 2010, the Company purchased 3% of Shanghai Ruichuang Network Technology Co., Ltd's ordinary shares for a total consideration of RMB20,495,239, which was accounted for as a cost method investment as prescribed by ASC 323-10. There was no impairment indicators present associated with this investment as at December 31, 2010 and 2011. This investment was subsequently sold in February 2012 with net proceeds of approximately RMB20,800,000 (US$3,305,000).

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- Definition The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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