Quarterly report pursuant to Section 13 or 15(d)

10. Warrants (Tables)

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10. Warrants (Tables) - Warrants [Member]
3 Months Ended
Jun. 30, 2017
Warrant activity
    Amount     Range of
Exercise
Price
  Weighted
Average
Exercise
Price
 
Warrants outstanding at March 31, 2017     2,604,096     $2.10 - $15.00   $ 3.64  
Exercised         n/a     n/a  
Issued         n/a     n/a  
Cancelled/Expired     (128,357 )   $5.00 –$9.00   $ 5.80  
Warrants outstanding at June 30, 2017     2,475,739     $2.10 - $15.00   $ 3.47  
Warrants exercisable at June 30, 2017     2,475,739     $2.10 - $15.00   $ 3.47  
Assumptions used
Risk free interest rate 0.79% – 1.38%  
Average expected life  3 months – 2.33 years
Expected volatility  68% – 111%
Expected dividends  None