REVENUE (Details 1) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2020
Net sales	$ 50,829	$ 16,600	$ 22,291
United States
Net sales	5,110	5,386	13,544
Europe
Net sales	19	140	1,191
Asia
Net sales	$ 45,700	$ 11,074	$ 7,556