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10. Warrants
3 Months Ended
Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Warrants

During the three months ended June 30, 2015, we issued 746,656 warrants with an exercise price of $6.30 per share. Those warrants were issued in connection with our June 2015 financing (see Note 6).

 

A summary of warrant activity during the three months ended June 30, 2015 is presented below:

 

    Amount     Range of
Exercise
Price
    Weighted
Average
Exercise
Price
 
Warrants outstanding at March 31, 2015     1,430,738       $2.10 - $15.00     $ 6.84  
Exercised                    
Issued     746,656       $6.30     $ 6.30  
Cancelled/Expired                    
Warrants outstanding at June 30, 2015     2,177,394       $2.10 - $15.00     $ 6.62  
Warrants exercisable at June 30, 2015     2,177,394       $2.10 - $15.00     $ 6.62  

 

The following outlines the significant weighted average assumptions used to estimate the fair value information presented, with respect to warrants utilizing the Binomial Lattice option pricing models at, and during the three months ended June 30, 2015:

 

Risk free interest rate 1.70%  
Average expected life    5 years
Expected volatility      98.6%
Expected dividends  None

 

The expected volatility was based on the historic volatility. The expected life of options granted was based on the "simplified method" as described in the SEC's guidance due to changes in the vesting terms and contractual life of current option grants compared to our historical grants.