SIGNIFICANT ACCOUNTING POLICIES (Details) - Inventories - USD ($)	Nov. 30, 2022	May 31, 2022
Inventories Abstract
Raw materials	$ 1,685,000	$ 1,717,000
Work in progress	811,000	763,000
Finished products	339,000	782,000
Total gross inventory	2,835,000	3,262,000
Inventory reserves	(773,916)	(845,549)
Net inventory	$ 2,061,444	$ 2,416,447

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

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Amount of valuation reserve for inventory.

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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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