SEGMENT AND CONCENTRATION INFORMATION (Details Narrative) - USD ($)	3 Months Ended		9 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022	May 31, 2022
Operating lease right-of-use assets	$ 6,293,000		$ 6,293,000		$ 917,000
United States [Member]
Operating lease right-of-use assets	6,169,000		6,169,000		822,000
Asia [Member]
Operating lease right-of-use assets	$ 76,000		$ 76,000		$ 95,000
Five Largest Customers [Member]
Customers accounted for 10% or more of total revenues	98.00%	99.00%	97.00%	97.00%
Customer A [Member]
Customers accounted for 10% or more of total revenues	12.00%	90.00%	16.00%	84.00%
Customers B [Member]
Customers accounted for 10% or more of total revenues	82.00%		77.00%
Europe
Operating lease right-of-use assets	$ 48,000		$ 48,000