SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) - USD ($)		12 Months Ended
	Mar. 07, 2023	May 31, 2023	May 31, 2022	Jan. 22, 2021
Product Information [Line Items]
Accumulated deficit		$ 42,217,000	$ 35,077,000
Cash and cash equivalents		9,719,000	5,917,000
Working capital		10,852,000
Shelf registration statement maximum authorized common stock issuance value				$ 15,000,000
Proceeds from issuance of common stock		10,014,000	2,402,000
Sale of stock expenses	$ 700,000
Revenues		5,339,000	18,871,000
Other receivables, gross, current		751,000	927,000
Inventory, gross		2,728,000	3,262,000
Property, plant and equipment, net		$ 213,000	214,000
Threshold period past due for write-off of trade accounts receivable		90 days
Accounts receivable, credit loss expense (Reversal)		$ 29,000	153,000
Prepaid expense and other assets		300,000	320,000
Inventory reserves		672,000	846,000
Depreciation, depletion and amortization		84,000	339,000
Amortization of intangible assets		18,000	239,000
Asset impairment charges		0	210,000
Investments		165,000	165,000
Share-based payment arrangement, expense		1,185,000	1,260,000
Proceeds from customers		60,000
Research and development expense		1,584,000	1,812,000
Deferred tax assets, valuation allowance		8,940,000	6,967,000
Deferred tax assets, net		8,940,000	6,967,000
Advertising expense		$ 156,000	$ 76,000
Share-Based Payment Arrangement, Option [Member]
Product Information [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)		2,342,616	2,321,616
Polish Distributor [Member]
Product Information [Line Items]
Investments		$ 165,000
Equity method investment, ownership percentage		6.00%
Marketing and Distribution Rights [Member]
Product Information [Line Items]
Finite-lived intangible asset, useful life		18 years
Purchased Technology Rights [Member]
Product Information [Line Items]
Finite-lived intangible asset, useful life		10 years
Patents [Member]
Product Information [Line Items]
Finite-lived intangible asset, useful life		20 years
Property, Plant and Equipment [Member]
Product Information [Line Items]
Depreciation, depletion and amortization		$ 66,000	$ 100,000
MEXICO
Product Information [Line Items]
Inventory, gross		626,000	621,000
Property, plant and equipment, net		$ 17,000	$ 17,000
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Distributor One [Member]
Product Information [Line Items]
Concentration risk, percentage		35.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Distributor Two [Member]
Product Information [Line Items]
Concentration risk, percentage			65.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | One Distributor [Member]
Product Information [Line Items]
Concentration risk, percentage		35.00%	55.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | One Distributor [Member]
Product Information [Line Items]
Concentration risk, percentage		36.00%	50.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Distributors In Asia [Member]
Product Information [Line Items]
Concentration risk, percentage		100.00%
Cost of Goods and Service, Product and Service Benchmark [Member] | Supplier Concentration Risk [Member] | One Vendor [Member]
Product Information [Line Items]
Concentration risk, percentage			84.00%
Minimum [Member]
Product Information [Line Items]
Property, plant and equipment, useful life		5 years
Maximum [Member]
Product Information [Line Items]
Property, plant and equipment, useful life		10 years
ATM Agreement [Member]
Product Information [Line Items]
Sale of stock, number of shares issued in transaction		573,889	521,267
Sale of stock, consideration received on transaction		$ 2,014,000	$ 2,402,000
Proceeds from issuance of common stock	7,300,000	1,961,000	2,317,000
Sale of stock expenses	$ 700,000	$ 53,000	$ 85,000
Net proceeds from ATM (in Shares)	3,333,333
Share price	$ 2.40
ATM Agreement [Member] | Minimum [Member]
Product Information [Line Items]
Sale of stock, price per share		$ 3.15	$ 4.02
ATM Agreement [Member] | Maximum [Member]
Product Information [Line Items]
Sale of stock, price per share		$ 4.26	$ 5.63