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Preferred Stock Warrants and Warrant Liability (Details 1) (Warrant [Member], USD $)
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12 Months Ended |
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Dec. 31, 2011
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| 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 |
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Maximum [Member]
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| 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 |
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Minimum [Member]
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| 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 |
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- Definition
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
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- Definition
Agreed upon price for the exchange of the underlying asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
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). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Risk-free interest rate assumption used in valuing an instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Price of a single share of a number of saleable stocks of a company. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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