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Derivative Instruments (Details) (USD $)
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1 Months Ended | 3 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended | ||||||||||||
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Jul. 31, 2012
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Nov. 30, 2010
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Jun. 30, 2010
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Jun. 30, 2010
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Jun. 30, 2010
Convertible Preferred Stock [Member]
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Dec. 31, 2011
Series CC Warrants [Member]
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Nov. 30, 2010
Series CC Warrants [Member]
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Dec. 31, 2011
Series DD Warrants [Member]
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Nov. 30, 2010
Series DD Warrants [Member]
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Dec. 31, 2011
Series Z Warrants [Member]
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Dec. 31, 2010
Series Z Warrants [Member]
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Mar. 31, 2011
Series CC and Series DD Warrants [Member]
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Dec. 31, 2011
Series CC and Series DD Warrants [Member]
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Dec. 31, 2010
Series CC and Series DD Warrants [Member]
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Dec. 31, 2012
Series GG Warrants [Member]
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Dec. 31, 2011
Series GG Warrants [Member]
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Dec. 31, 2010
Series V Warrants [Member]
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Mar. 31, 2011
Series V Warrants [Member]
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Dec. 31, 2012
Series V Warrants [Member]
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Dec. 31, 2011
Series V Warrants [Member]
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Dec. 31, 2010
Series V Warrants [Member]
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Dec. 31, 2011
Series CC and DD Warrants [Member]
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Nov. 30, 2010
Series CC and DD Warrants [Member]
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| Class of Warrant or Right [Line Items] | ||||||||||||||||||||||||||
| Warrants, exercise price | $ 0.68 | $ 2.11 | $ 2.11 | $ 2.1 | ||||||||||||||||||||||
| Warrants, number of securities called by warrants | 1,578,948 | 1,578,948 | 333,333 | |||||||||||||||||||||||
| Warrants outstanding | 11,530,877 | |||||||||||||||||||||||||
| Warrants, expiration date | Dec. 29, 2016 | |||||||||||||||||||||||||
| Securities Exchange Agreement Shares Exchanged | 10,000 | |||||||||||||||||||||||||
| Derivative liabilities written off from exchange of stock | $ 966,000 | $ 966,000 | ||||||||||||||||||||||||
| Proceeds from issuance of equity | 6,000,000 | |||||||||||||||||||||||||
| Common stock, price per share | $ 1.9 | |||||||||||||||||||||||||
| Reclassification to additional paid in capital | 164,000 | 280,000 | 549,000 | 1,100,000 | 801,000 | 484,000 | 280,000 | 1,400,000 | 52,000 | 96,000 | 280,000 | |||||||||||||||
| Warrants exercised | 60,000 | 60,000 | 120,000 | 20,000 | 810,000 | |||||||||||||||||||||
| Issued stock upon exercise of warrants, shares | 1,578,948 | 1,578,948 | 46,902 | 20,000 | 810,000 | |||||||||||||||||||||
| Issued stock upon exercise of warrants, gross proceeds | 3,331,580 | 3,331,580 | 6,200 | 255,600 | ||||||||||||||||||||||
| Stock Issued During Period, Shares, Issued for Noncash Consideration | 300,000 | 300,000 | ||||||||||||||||||||||||
| Change in derivative liabilities | (32,110) | 952,375 | 1,336,234 | 79,000 | (38,000) | 119,000 | 752,000 | |||||||||||||||||||
| Estimated fair value of derivative liabilities | $ 569,000 | $ 2,500,000 | $ 520,478 | $ 1,200,000 | ||||||||||||||||||||||