SCHEDULE OF STOCK BASED COMPENSATION EXPENSE (Details) - USD ($)	12 Months Ended
	May 31, 2023	May 31, 2022
Total stock option expense	$ 1,185,000	$ 1,260,000
Cost of Sales [Member]
Total stock option expense	143,000	159,000
Selling, General and Administrative Expenses [Member]
Total stock option expense	971,000	1,021,000
Research and Development Expense [Member]
Total stock option expense	$ 71,000	$ 80,000