SEGMENT INFORMATION (Details) - USD ($) $ in Thousands	Feb. 28, 2022	May 31, 2021
Property and equipment, net	$ 776	$ 677
Asia [Member]
Property and equipment, net	37	30
United States [Member]
Property and equipment, net	$ 739	$ 647

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant