REVENUE (Details 1) - USD ($)	3 Months Ended		6 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Net sales	$ 14,815,000	$ 9,611,000	$ 25,486,000	$ 15,257,000
Asia
Net sales	12,216,000	8,716,000	20,024,000	13,853,000
United States
Net sales	2,555,000	895,000	5,418,000	1,401,000
Europe
Net sales	$ 44,000	$ 0	$ 44,000	$ 3,000