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Stockholders' Equity (Details 1) (USD $) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2013 | Dec. 31, 2012
Summary of warrants outstanding |  |
Number of Warrants | 14,639,260 | 21,593,844
Common Stock Warrant Liability | $ 14,095,818 | $ 2,859,899
March 2013 Financing [Member] |  |
Summary of warrants outstanding |  |
Exercise Price | 0.79 |
Expiration Date | Sep. 12, 2018 |
Number of Warrants | 3,397,725 | 0
Common Stock Warrant Liability | 6,292,586 | 0
December 2011 financing [Member] |  |
Summary of warrants outstanding |  |
Exercise Price | 0.65 |
Expiration Date | Dec. 06, 2016 |
Number of Warrants | 0 | 5,774,784
Common Stock Warrant Liability | 0 | 2,078,921
January 2011 financing [Member] |  |
Summary of warrants outstanding |  |
Exercise Price | 1.40 |
Expiration Date | Jan. 27, 2016 |
Number of Warrants | 6,900,000 | 10,565,200
Common Stock Warrant Liability | 7,658,999 | 779,711
July 2009 financing [Member] |  |
Summary of warrants outstanding |  |
Exercise Price | 3.38 |
Expiration Date | Jul. 01, 2014 |
Number of Warrants | 333,333 | 333,333
Common Stock Warrant Liability | 144,233 | 1,267
Warrants assumed in June 2009 Merger [Member] |  |
Summary of warrants outstanding |  |
Number of Warrants | 4,008,202 | 4,920,527
Common Stock Warrant Liability | $ 0 | $ 0
Minimum [Member] | Warrants assumed in June 2009 Merger [Member] |  |
Summary of warrants outstanding |  |
Exercise Price | 1.02 |
Expiration Date | Aug. 01, 2015 |
Maximum [Member] | Warrants assumed in June 2009 Merger [Member] |  |
Summary of warrants outstanding |  |
Exercise Price | 1.28 |
Expiration Date | Apr. 28, 2016 |

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