Quarterly report pursuant to Section 13 or 15(d)

Warrant Liability (Tables)

v3.5.0.2
Warrant Liability (Tables)
 6 Months Ended
Jun. 30, 2016
Schedule of Aggregate Fair Values, Warrants [Table Text Block]
    June 30,     December 31,  
    2016     2015  
Calculated aggregate value $ 198,955   $ 2,327,195  
Weighted average exercise price per share of warrant $ 27.60   $ 18.60  
Closing price per share of common stock $ 2.30   $ 5.00  
Weighted average volatility   86.81%     83.6%  
Weighted average remaining expected life (years)   3.02     5.11  
Weighted average risk-free interest rate   0.74     1.90  
Dividend yield   0%     0%