Quarterly report pursuant to Section 13 or 15(d)

12. Derivative Liability (Details)

v3.7.0.1
12. Derivative Liability (Details) - $ / shares
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Exercise price ($)   $ 6.25
Risk-free interest rate (%) 2.23%  
Minimum    
Stock price ($) $ 1.45 $ 1.79
Exercise price ($) $ 1.54  
Risk-free interest rate (%)   1.58%
Expected volatility (%) 64.30% 94.60%
Time to maturity (years) 1 year 6 months 2 years 9 months
Maximum    
Stock price ($) $ 1.58 $ 1.84
Exercise price ($) $ 1.55  
Risk-free interest rate (%)   1.78%
Expected volatility (%) 74.40% 96.70%
Time to maturity (years) 1 year 9 months 3 years