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Warrant Liabilities (Details Textual) (USD $)
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6 Months Ended | ||||
|---|---|---|---|---|---|
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Jun. 30, 2012
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Apr. 09, 2012
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Mar. 15, 2011
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Sep. 30, 2010
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Dec. 31, 2009
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| Warrant Liability (Textual) [Abstract] | |||||
| Purchase and sale of shares of common stock under subscription agreements | 6,517,648 | ||||
| Exercise price of warrant per share | 1.57 | 0.87 | 2.13 | ||
| Warrant Liability (Additional Textual) [Abstract] | |||||
| Deerfield six-year warrants to Purchase common stock shares | 6,000,000 | ||||
| Exercise price of common stock shares | $ 1.57 | ||||
| Exercisable and expiration date of warrant | Mar. 15, 2017 | ||||
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Series A Warrants [Member]
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| Warrant Liability (Textual) [Abstract] | |||||
| Six-year warrants to purchase shares of common stock | 6,517,648 | ||||
| Exercise price of warrant per share | 1.15 | ||||
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Series B Warrants [Member]
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| Warrant Liability (Textual) [Abstract] | |||||
| Six month warrants to purchase shares of common stock | 6,517,648 | ||||
| Exercise price of warrant per share | 0.85 |