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STOCK-BASED COMPENSATION (Tables)
3 Months Ended
Jun. 30, 2020
STOCKHOLDERS' EQUITY  
Assumptions used in fair value method
         
    Three Months Ended
June 30, 2020
 
Risk-free interest rates     .31% - .37 %
Volatility     123% - 128 %
Expected life (years)     5.0 - 6.0  
Dividend yield      
Stock option activity
          Options Outstanding  
                Weighted  
    Shares           Average  
    Available     Number of     Exercise  
    for Grant     Shares     Prices  
Balance at March 31, 2020     822,055       3,177,945     $ 1.58  
Options granted     (230,476 )     230,476       2.88  
Options cancelled and returned to the Plan     833       (833 )     2.25  
Balance at June 30, 2020     592,412       3,407,588     $ 1.48  
Range of outstanding and exercisable options
    Options Outstanding     Options Exercisable  
Range of Exercise Price   Number
Outstanding
    Weighted
Average
Remaining
Contractual
Life
(in Years)
    Weighted
Average
Exercise
Price
    Number
Exercisable
    Weighted
Average
Exercise
Price
    Aggregate
Intrinsic
value
 
$0.66 - $3.16     3,407,587       8.9     $ 1.67       1,642,550     $ 0.97     $