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9. Stock Compensation (Tables)
6 Months Ended
Sep. 30, 2018
Share based compensation expense
   Three Months
Ended
September 30,
2018
   Three Months
Ended
September 30,
2017
   Six Months
Ended
September 30,
2018
   Six Months
Ended
September 30,
2017
 
Vesting of stock options and restricted stock units  $336,496   $283,534   $599,658   $564,445 
Total stock-based compensation expense  $336,496   $283,534   $599,658   $564,445 
                     
Weighted average number of common shares outstanding – basic and diluted   17,789,236    9,032,157    17,771,918    8,939,624 
                     
Basic and diluted loss per common share attributable to stock-based compensation expense  $(0.02)  $(0.03)  $(0.03)  $(0.06)
Restricted Stock [Member]  
Options vested and expected to vest
   Number of RSUs 
Vested   46,125 
Expected to vest   342,926 
Total   389,051 
Options [Member]  
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    3.84 
Expected to vest   18,000   $1.68    8.71 
Total   374,047           
Schedule of stock options valuation assumptions
Risk free interest rate 2.21%
Average expected life 10 years
Expected volatility 92.14%
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          $ 
Cancelled/Expired   35,000   $20.50   $20.50 
Stock options outstanding at September 30, 2018   374,047    $1.68 – $12.50   $8.48 
Stock options exercisable at September 30, 2018   356,047    $1.68 – $12.50   $8.83