Quarterly report pursuant to Section 13 or 15(d)

Warrant Liability (Tables)

v3.3.0.814
Warrant Liability (Tables)
6 Months Ended
Jun. 30, 2015
Schedule of Aggregate Fair Values, Warrants [Table Text Block]
    June 30,     December 31,  
    2015     2014  
Calculated aggregate value $ 2,975,061   $ 4,633,312  
Weighted average exercise price per share of warrant $ 3.72   $ 3.72  
Closing price per share of common stock $ 1.12   $ 1.55  
Weighted average volatility   90.61     89.80  
Weighted average remaining expected life (years)   5.54     6.11  
Weighted average risk-free interest rate   1.82     1.94  
Dividend yield   0%     0%