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Stockholders' Deficit (Details) (USD $)
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1 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 1 Months Ended | 2 Months Ended | 1 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2012
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Mar. 31, 2013
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Apr. 30, 2013
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Dec. 31, 2012
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Apr. 09, 2012
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Mar. 15, 2011
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Dec. 31, 2012
Accrued Liabilities [Member]
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Mar. 31, 2013
Series A Warrants [Member]
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Apr. 30, 2013
Series A Warrants [Member]
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Apr. 09, 2012
Series A Warrants [Member]
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Oct. 31, 2012
Series B Warrants [Member]
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Sep. 30, 2012
Series B Warrants [Member]
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Apr. 30, 2013
Series B Warrants [Member]
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Apr. 09, 2012
Series B Warrants [Member]
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Mar. 31, 2013
Deerfield Warrant [Member]
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Apr. 30, 2013
Deerfield Warrant [Member]
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Mar. 15, 2011
Deerfield Warrant [Member]
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Apr. 30, 2012
Institutional Investor [Member]
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| Stockholders' Deficit (Textual) [Abstract] | ||||||||||||||||||
| Number of common stock issued upon exercise of warrants | 1,109,010 | 4,627,941 | 1,133,824 | |||||||||||||||
| Gross proceeds | $ 1,275,000 | $ 1,275,000 | $ 3,934,000 | $ 964,000 | ||||||||||||||
| Class of warrant or right exercised | 6,000,000 | |||||||||||||||||
| Deerfield exercise reduction of our outstanding indebtedness | 7,500,000 | |||||||||||||||||
| Premium allocated to fair value option agreement | 1,700,000 | |||||||||||||||||
| Purchase and sale of warrants of common stock under subscription agreement | 6,517,678 | 6,517,678 | ||||||||||||||||
| Gross proceeds from sale of institutional investor | 5,540,000 | |||||||||||||||||
| Exercise price of warrant per share | 1.57 | 1.15 | 0.85 | 1.25 | 1.25 | |||||||||||||
| Stockholders' Deficit (Additional Textual) [Abstract] | ||||||||||||||||||
| Number of common stock sold | 3,400,000 | |||||||||||||||||
| Purchase price of sold common stock | 4,250,000 | |||||||||||||||||
| Per share price of sold common stock | $ 1.25 | |||||||||||||||||
| Allocated to fair value option agreement | $ 0.50 | |||||||||||||||||
| Purchase and sale of shares of common stock under subscription agreements | 6,517,678 | 6,517,648 | ||||||||||||||||
| Payment of stock issuance costs | 500,000 | |||||||||||||||||
| Fair value of warrants | $ 2,900,000 | |||||||||||||||||