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Derivative Financial Instruments (Details) - USD ($) |  | 12 Months Ended |
--- | --- | --- | ---
Aug. 14, 2015 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Derivative [Line Items] |  |  |  |
Warrant liability |  | $ 5,060 | $ 3,203,465 |
Loss on exchange of warrants |  | 1,845,810 | 0 |
Fair value of 2013 PPM warrants reclassified from liability to equity |  |  | 3,166,482 |
Change in fair value of derivative |  | $ (2,133,820) | $ 7,845,214 |
Warrant [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Common Shares linked to Derivative Warrants |  | 6,196 | 1,795,564 | 718,024
Reclass of private placement warrants to equity |  |  | (711,828) |
Change in fair value of derivative, shares |  | 0 | 0 |
Warrant liability |  | $ 5,060 | $ 3,203,465 | $ 1,832,945
Loss on exchange of warrants |  | 1,197,821 |  |
Remaining unexercised warrants, shares | 396,536 |  |  |
Fair value of remaining unexercised warrants | $ (1,181,638) |  |  |
Fair value of 2013 PPM warrants reclassified from liability to equity |  |  | 3,166,482 |
Change in fair value of derivative |  | $ 2,133,820 | $ (7,845,214) |
2014 Warrants [Member] | Warrant [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Class of warrant or right, issuance of warrants to investors in private placement |  |  | 1,789,368 |
Exercise of warrants (shares) | (1,392,832) |  |  |
Fair value of warrants exercised | $ (5,348,408) |  |  |
Class of warrant or right, issued in private placement |  |  | $ 12,382,216 |

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