Warrant Liability (Detail) (Warrant, USD $)	12 Months Ended
Dec. 31, 2011
Fair value of the warrants using binomial lattice valuation model
Market value of stock at end of period	$ 0.01
Expected dividend rate	0.00%
Shares underlying warrants outstanding classified as liabilities	41,558,259
Minimum
Fair value of the warrants using binomial lattice valuation model
Exercise price	$ 0.1198
Expected volatility	33.47%
Risk-free interest rate	0.03%
Expected life in years	3 years 4 months 24 days
Maximum
Fair value of the warrants using binomial lattice valuation model
Exercise price	$ 0.7345
Expected volatility	62.86%
Risk-free interest rate	3.18%
Expected life in years	9 years 10 months 24 days

The specified number of securities that each class of warrants or rights outstanding give the holder the right but not the obligation to purchase from the issuer at a specific price, on or before a certain date.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i)(2))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Subparagraph 2

-Article 4

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- Definition

Agreed upon price for the exchange of the underlying asset.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

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Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

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Risk-free interest rate assumption used in valuing an instrument.

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- Definition

Price of a single share of a number of saleable stocks of a company.

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