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SHAREHOLDERS’ EQUITY (Tables)
 12 Months Ended
May 31, 2023
Equity [Abstract]  
SCHEDULE OF STOCK BASED COMPENSATION EXPENSE

 Stock-based compensation expense for the years ended May 31, 2023 and 2022 is as follows:

 

 SCHEDULE OF STOCK BASED COMPENSATION EXPENSE

   2023   2022 
   For the Year Ended May 31, 
   2023   2022 
Cost of sales  $143,000   $159,000 
Selling, general and administrative   971,000    1,021,000 
Research and development   71,000    80,000 
Total stock option expense  $1,185,000   $1,260,000 
SCHEDULE OF ACTIVITY TO AGGREGATE STOCK OPTIONS

 Activity as to aggregate stock options outstanding is as follows:

 

SCHEDULE OF ACTIVITY TO AGGREGATE STOCK OPTIONS 

   Number of Stock Options   Weighted Average Exercise Price   Aggregate Intrinsic Value 
Options Outstanding at May 31, 2021   2,081,366   $3.59   $2,132,000 
Options granted   344,000   $4.43      
Options exercised   (39,500)  $1.99   $90,000 
Options canceled or expired   (64,250)  $4.41      
Options Outstanding at May 31, 2022   2,321,616   $3.72   $1,838,000 
Options granted   243,000   $2.70      
Options exercised   (46,500)  $1.73   $90,000 
Options canceled or expired   (175,500)  $5.56      
Options Outstanding at May 31, 2023   2,342,616   $3.52   $146,000 
Options vested and exercisable at May 31, 2023   1,841,933   $3.38   $146,000