GEOGRAPHIC INFORMATION (Details) - Geographic information regarding net sales - USD ($)	3 Months Ended
	Aug. 31, 2022	Aug. 31, 2021
Revenues from sales to unaffiliated customers:
Net Sales	$ 1,637,435	$ 1,261,787
Asia [Member]
Revenues from sales to unaffiliated customers:
Net Sales	814,000	675,000
Europe [Member]
Revenues from sales to unaffiliated customers:
Net Sales	552,000	471,000
North America [Member]
Revenues from sales to unaffiliated customers:
Net Sales	268,000	105,000
South America [Member]
Revenues from sales to unaffiliated customers:
Net Sales	3,000	3,000
Middle East [Member]
Revenues from sales to unaffiliated customers:
Net Sales		$ 8,000