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Derivative Financial Instruments - Derivative Warrants (Details) (USD $) | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Dec. 31, 2011 | Jul. 31, 2011 | May 31, 2011
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common shares linked to derivative warrants (shares) | 31,080 |  |  |  | 31,080 |  |  |  | 154,132 | 250 | 153,882
Change in fair value of derivative | $ (832,422) |  | $ 29,791 |  | $ (727,725) |  | $ 29,791 |  |  |  |
Loss on exchange of warrants | $ (764,513) |  |  |  | $ (764,513) |  |  |  |  |  |
Binomial Lattice Option Valuation Technique [Member] | Warrant [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fair market value of asset (per share) | $ 3.20 | [1] | $ 13.20 | [1] | $ 3.20 | [1] | $ 13.20 | [1] |  |  |
Exercise price (per share) | $ 20.00 |  | $ 20.00 |  | $ 20.00 |  | $ 20.00 |  |  |  |
Term (in years) |  |  |  |  |  |  | 4 years 11 months | [2] |  |  |
Implied expected life (in years) |  |  |  |  |  |  | 4 years 10 months | [3] |  |  |
Equivalent volatility (percentage) |  |  |  |  |  |  | 75.70% | [3] |  |  |
Equivalent risk-free interest rate (percentage) |  |  |  |  |  |  | 0.47% | [3] |  |  |
Binomial Lattice Option Valuation Technique [Member] | Warrant [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Term (in years) |  |  |  |  | 3 years 11 months | [2] |  |  |  |  |
Implied expected life (in years) |  |  |  |  | 3 years 11 months | [3] |  |  |  |  |
Equivalent volatility (percentage) |  |  |  |  | 53.70% | [4] | 61.60% | [4] |  |  |
Equivalent volatility (percentage) |  |  |  |  | 63.00% | [3] |  |  |  |  |
Risk-free interest rate range of inputs (percentage) |  |  |  |  | 0.09% | [5] | 0.10% | [5] |  |  |
Equivalent risk-free interest rate (percentage) |  |  |  |  | 0.24% | [3] |  |  |  |  |
Binomial Lattice Option Valuation Technique [Member] | Warrant [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Term (in years) |  |  |  |  | 4 years 1 month | [2] |  |  |  |  |
Implied expected life (in years) |  |  |  |  | 4 years 1 month | [3] |  |  |  |  |
Equivalent volatility (percentage) |  |  |  |  | 88.30% | [4] | 95.00% | [4] |  |  |
Equivalent volatility (percentage) |  |  |  |  | 65.50% | [3] |  |  |  |  |
Risk-free interest rate range of inputs (percentage) |  |  |  |  | 0.41% | [5] | 0.81% | [5] |  |  |
Equivalent risk-free interest rate (percentage) |  |  |  |  | 0.27% | [3] |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Exchange of warrants for common stock (shares) |  |  |  |  | 123,052 |  |  |  |  |  |
[1] | The fair market value of the asset was determined by the Company using all available information including, but not limited to the trading market price and the actual, negotiated prices paid by the independent investors in the May 2011 Offering and a private offering in December 2011.
[2] | The term is the contractual remaining term, allocated among twelve equal intervals for purposes of calculating other inputs, such as volatility and risk-free rate.
[3] | The implied expected life, and equivalent volatility and risk-free interest rate amounts are derived from the Binomial.
[4] | The Company does not have a market trading history upon which to base its forward-looking volatility. Accordingly, the Company selected peer companies that provided a reasonable basis upon which to calculate volatility for each of the intervals described in (1), above.
[5] | The risk-free rates used for inputs represent the yields on zero coupon US Government Securities with periods to maturity consistent with the intervals described in (1), above.

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