Quarterly report pursuant to Section 13 or 15(d)

10. Warrants (Tables)

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10. Warrants (Tables) - Warrants [Member]
6 Months Ended
Sep. 30, 2017
Warrant activity
      Amount     Range of
Exercise
Price
    Weighted
Average
Exercise
Price
 
  Warrants outstanding at March 31, 2017       2,604,096       $2.10 - $12.05     $ 3.64  
  Exercised             n/a       n/a  
  Issued             n/a       n/a  
  Cancelled/Expired       (139,357 )     $5.00 –$15.00     $ 6.52  
  Warrants outstanding at September 30, 2017       2,464,739       $2.10 - $12.05     $ 3.48  
  Warrants exercisable at September 30, 2017       2,464,739       $2.10 - $12.05     $ 3.48  
Assumptions used
Risk free interest rate     0.79% – 1.38%    
Average expected life     3 months – 2.33 years  
Expected volatility     65.9% – 111.1%  
Expected dividends     None