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Weighted average assumptions (Tables)
12 Months Ended
Dec. 31, 2014
Weighted average assumptions:  
Weighted average assumptions

The fair value of each warrant granted for equity and debt raises was determined using the Black-Scholes warrant pricing model and the following assumptions:

 

    December 31, 2014  
Risk free interest rate   1.10 % to 1.38 %
Expected term   3-4 years  
Annualized volatility     90 %
Expected dividends