Quarterly report pursuant to Section 13 or 15(d)

12. Derivative Liability (Details)

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12. Derivative Liability (Details) - $ / shares
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Stock price ($) $ 1.65 $ 1.88
Exercise price ($) $ 6.25  
Risk-free interest rate (%) 1.56%  
Expected volatility (%) 92.40% 125.40%
Time to maturity (years) 2 years 3 months  
Minimum    
Exercise price ($)   $ 0
Risk-free interest rate (%)   1.75%
Time to maturity (years)   7 years 29 days
Maximum    
Exercise price ($)   $ 6.25
Risk-free interest rate (%)   2.06%
Time to maturity (years)   8 years 3 months