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Warrant Liability (Details Textual) (USD $) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | 1 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
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May 02, 2012 | Nov. 30, 2009 | Nov. 30, 2008 | Sep. 30, 2012 | Sep. 30, 2012 | Dec. 31, 2011 | Dec. 31, 2012 Series A Warrants [Member] | Sep. 30, 2012 Series A Warrants [Member] | Jun. 30, 2012 Series A Warrants [Member] | Sep. 30, 2012 Series A Warrants [Member] | Dec. 31, 2011 Series A Warrants [Member] | May 02, 2012 Series B Warrant [Member] | Nov. 30, 2009 Series B Warrant [Member] | Nov. 30, 2008 Series B Warrant [Member] | Jun. 30, 2012 Series B Warrant [Member] | Sep. 30, 2012 Series B Warrant [Member] | Dec. 31, 2011 Series B Warrant [Member]
Warrant Liability (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds | $ 5,300,000 |  |  | $ 3,375,000 | $ 4,153,584 |  | $ 1,045,660 | $ 977,900 |  |  |  | $ 5,300,000 | $ 12,500,000 | $ 20,000,000 |  | $ 3,375,000 | $ 10,000,000
Number of shares of common stock |  |  |  |  |  |  |  | 1,445,400 | 2,700,000 | 1,445,400 |  |  | 0.40 | 0.75 |  | 2,700,000 |
Exercise price |  | 15.00 | 23.00 |  | 1.40 |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued |  |  |  |  |  |  |  |  |  |  |  |  | 400,000 | 1,034,483 |  |  |
Warrants sold at public offering price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.25
Exercise price of warrant |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.40 | 1.25
Exercise price of common stock |  |  |  |  |  |  |  |  |  |  | $ 1.40 |  |  |  |  |  |
Number of warrants exercised |  |  |  |  | 688,171 |  |  | 1,445,400 |  | 1,445,400 |  |  |  |  | 2,700,000 | 2,700,000 |
Number of units raised through public offering |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,000,000
Warrants issued |  |  |  |  |  |  |  |  |  | 2,700,000 |  |  |  |  |  | 2,700,000 |
Warrant Liability (Additional Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Units sold to institutional investors |  | 1,000,000 | 1,379,310 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Price per unit sold to institutional investors |  | $ 12.50 | $ 14.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total proceeds, net of offering expenses and placement agency fees |  | $ 11,985,000 | $ 18,637,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of issuance warrant |  |  |  |  |  | 90th trading day |  |  |  |  |  |  |  |  |  |  |

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