SIGNIFICANT ACCOUNTING POLICIES (Details) - Inventories - USD ($)	Feb. 28, 2023	May 31, 2022
Inventories Abstract
Raw materials	$ 1,714,000	$ 1,717,000
Work in progress	924,000	763,000
Finished products	234,000	782,000
Total gross inventory	2,872,000	3,262,000
Inventory reserves	(807,576)	(845,549)
Total	$ 2,064,152	$ 2,416,447