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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