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Derivatives (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Beginning balance, Shares subject to warrants | 1,615,260 | 1,627,369
Transfer from liability to equity classification, Shares subject to warrants |  | (12,109)
Modification of warrants, Shares subject to warrants |  |
Expiration of derivative warrants,Shares subject to warrants | (1,558,048) |
Change in fair value, Shares subject to warrants |  |
Ending Balance, Shares subject to warrants | 57,212 | 1,615,260
Beginning balance, Fair Value | $ 300,683 | $ 2,848,902
Transfer from liability to equity classification, Fair Value |  | (17,455)
Modification of warrants, Fair Value | 19,356 |
Expiration of derivative warrants, Fair Value |  |
Change in fair value, Fair Value | (304,123) | (2,530,764)
Ending Balance, Fair Value | $ 15,916 | $ 300,683

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