Quarterly report pursuant to Section 13 or 15(d)

12. Derivative Liability (Tables)

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12. Derivative Liability (Tables)
3 Months Ended
Mar. 31, 2017
Derivative Liability Tables  
Assumptions used to determine the fair value of the warrants
    Three months ended March 31,  
    2017     2016  
Stock price ($)     1.58       1.79  
Adjusted Exercise price ($)     1.54       6.25  
Risk-free interest rate (%)     2.23       1.78  
Expected volatility (%)     74.40       96.70  
Time to maturity (years)     1.75       3.0