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Derivative Liability (Tables)
12 Months Ended
Dec. 31, 2015
Derivative Liability Tables  
Monte Carlo fair value of warrants
   

December 31,

2015

    December 31, 2014  
Stock price volatility     70 %     90 %
Risk-free interest rates     1.76 %     1.65 %
Annual dividend yield     0 %     0 %
Expected life   3.6-4.9 years     4.7 years