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10. Warrants (Tables)
3 Months Ended
Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Warrant activity
    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  
Assumptions used
Risk free interest rate 1.70%  
Average expected life    5 years
Expected volatility      98.6%
Expected dividends  None