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Derivatives (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Schedule of derivative warrant instruments activity |  |
Beginning balance, Shares subject to warrants | 1,627,369 | 1,649,329
Transfer from liability to equity classification, Shares subject to warrants | (12,109) | (21,960)
Change in fair value, Shares subject to warrants |  |
Ending Balance, Shares subject to warrants | 1,615,260 | 1,627,369
Beginning balance, Fair Value | $ 2,848,902 | $ 6,709,911
Transfer from liability to equity classification, Fair Value | (17,455) | (48,691)
Change in fair value, Fair Value | (2,530,764) | (3,812,318)
Ending Balance, Fair Value | $ 300,683 | $ 2,848,902

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