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Warrant Liability (Details Textual) (USD $) | 1 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 30, 2009 | Nov. 30, 2008 | Dec. 31, 2012 | Jun. 30, 2012 | Dec. 31, 2012 | Dec. 31, 2011
Warrant Liability (Textual) [Abstract] |  |  |  |  |  |
Gross proceeds |  |  |  | $ 3,375,000 | $ 6,256,438 |
Exercise price | 15.00 | 23.00 |  |  | 1.40 |
Warrant Liability (Additional Textual) [Abstract] |  |  |  |  |  |
Number of shares of common stock in each unit sold to institutional investors |  | 1 |  |  |  |
Number of warrants in each unit sold to institutional investors | 1 |  |  |  |  |
Number of shares of common stock in each unit issued in public offering |  |  |  |  |  | 1
Number of series A warrants in each unit issued in public offering |  |  |  |  |  | 1
Number of common stock shares under one series A warrant issued in public offering |  |  |  |  |  | 1
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
Number of units sold through public offering |  |  |  |  |  | 8,000,000
Series A Warrants [Member] |  |  |  |  |  |
Warrant Liability (Textual) [Abstract] |  |  |  |  |  |
Gross proceeds |  |  | 3,078,000 |  | 3,078,000 |
Number of shares of common stock |  |  |  | 2,700,000 | 2,700,000 |
Exercise price of common stock |  |  |  |  |  | $ 1.40
Number of warrants issued |  |  |  |  | 2,198,571 |
Warrants issued |  |  |  | 2,700,000 | 2,198,571 |
Series B Warrant [Member] |  |  |  |  |  |
Warrant Liability (Textual) [Abstract] |  |  |  |  |  |
Gross proceeds | $ 12,500,000 | $ 20,000,000 |  |  | $ 3,375,000 | $ 10,000,000
Number of shares of common stock | 0.40 | 0.75 | 2,198,571 |  | 2,700,000 |
Warrants issued | 400,000 | 1,034,483 |  |  |  |
Warrants sold at public offering price |  |  |  |  |  | 1.25
Exercise price of warrant |  |  |  | 1.40 |  | 1.25
Number of warrants issued |  |  |  | 2,700,000 | 2,700,000 |
Number of units raised through public offering |  |  |  |  |  | 8,000,000
Unissued warrant at the period end |  |  | 5,300,000 |  | 5,300,000 |

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- Definition The number of warrants or rights which entitle the entity to receive future services in exchange for the unvested, forfeitable warrants or rights. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number D-90 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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