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Warrant Liability (Tables) | 3 Months Ended
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Mar. 31, 2013
Warrant Liability [Abstract] |
Assumptions Used to Determine Fair Value of Warrants | All future changes in the fair value of the warrants are recognized currently in earnings until such time as the warrants are exercised or expire in August 2013. These warrants are not traded in an active securities market, and as such, we estimated the fair value of these warrants using an option pricing model with the following assumptions:
|  | As of March 31, 2013 |  |  | As of December 31, 2012 |
Expected term |  | 0.37 years |  |  | 0.61 years |
Common stock market price |  | $ | 2.51 |  |  | $ | 2.80 |
Risk-free interest rate |  |  | 0.09 | % |  |  | 0.11 | %
Expected volatility |  |  | 53.28 | % |  |  | 73.88 | %
Resulting fair value (per warrant) |  | $ | 0.04 |  |  | $ | 0.20 |

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- Definition Schedule of assumptions used to determine fair value of warrants including: Expected term, common stock market price, risk-free interest rate, expected volatility. + References No definition available. + Details
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