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9. Stock Compensation (Tables)
9 Months Ended
Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Share based compensation expense
   Three Months
Ended
December 31,
2018
   Three Months
Ended
December 31,
2017
   Nine Months
Ended
December 31,
2018
   Nine Months
Ended
December 31,
2017
 
Vesting of stock options and restricted stock units  $344,854   $323,162   $944,512   $887,607 
Total stock-based compensation expense  $344,854   $323,162   $944,512   $887,607 
                     
Weighted average number of common shares outstanding – basic and diluted   18,050,165    14,950,701    17,865,176    10,927,106 
                     
Basic and diluted loss per common share attributable to stock-based compensation expense  $(0.02)  $(0.02)  $(0.05)  $(0.08)
RSUs vested and expected to vest
   Number of RSUs 
Vested   46,125 
Expected to vest   240,650 
Total   286,775 
Options vested and expected to vest
   Number of
Shares
   Weighted
Average
Exercise
Price
   Weighted
Average
Remaining
Contractual
Term in
Years
 
             
Vested   356,047   $8.83    3.59 
Expected to vest   570,625   $1.26    9.95 
Total   926,672           
Schedule of stock options valuation assumptions
Risk free interest rate 2.85%
Average expected life 10 years
Expected volatility 94.64%
Expected dividends  None
Summary of stock options outstanding
   Amount   Range of
Exercise Price
   Weighted
Average
Exercise
Price
 
Stock options outstanding at March 31, 2018   409,047    $1.68-$20.50   $9.51 
Exercised          $ 
Granted   552,625   $1.25   $1.25 
Cancelled/Expired   (35,000)  $20.50   $20.50 
Stock options outstanding at December 31, 2018   926,672    $1.25 – $12.50   $4.17 
Stock options exercisable at December 31, 2018   356,047    $1.68 – $12.50   $8.83