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Long-term Investment (Parenthetical) (Detail)											1 Months Ended
	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	Feb. 29, 2012 Shanghai Ruichuang Network Technology Co Ltd Sale USD ($)	Feb. 29, 2012 Shanghai Ruichuang Network Technology Co Ltd Sale CNY
Schedule of Investments [Line Items]
Percentage of shareholding/ ownership										3.00%
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
Net proceed from sale of investment											$ 3,305,000	20,800,000
[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).

X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph a (1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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X

- 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

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- Definition

The cash inflow from sales of all investments, including securities and other assets, having ready marketability and intended by management to be liquidated, if necessary, beyond the current operating cycle.

+ References

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