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SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Feb. 28, 2022	Feb. 28, 2021	May 31, 2021	Jan. 22, 2021
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Retained Earnings (Accumulated Deficit)	$ (33,318,358)		$ (33,318,358)		$ (30,546,335)
Shelf Registration Statement Maximum Authorized Common Stock Issuance Value						$ 15,000,000
Cash, Uninsured Amount	9,765,000		9,765,000
Allowance for Credit Loss, Receivable, Other, Current	20,000		20,000
Prepaid Expense and Other Assets	667,000		667,000		370,000
Inventory Valuation Reserves	1,888,000		1,888,000		1,617,000
Inventory, LIFO Reserve	1,686,000		1,686,000
Depreciation, Depletion and Amortization	26,000	$ 26,000	80,000	$ 78,000
Amortization of Intangible Assets	$ 8,000	4,000	$ 22,000	16,000
Equity Method Investment, Ownership Percentage	6.00%		6.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in Shares)			23,500
Proceeds from Stock Options Exercised			$ 39,175	96,455
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in Shares)			307,000
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)			$ 4.44
Proceeds from Customers	$ 3,213,000
Research and Development Expense	456,998	$ 563,967	$ 1,515,384	$ 1,892,033
Deferred Tax Assets, Valuation Allowance	$ 6,479,000		$ 6,479,000		$ 5,904,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)			2,336,116	1,360,192
Minimum [Member]
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives			5
Maximum [Member]
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives			10 years
Distribution Rights [Member]
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life			18 years
Purchased Technology Rights [Member]
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life			10 years
Patents [Member]
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life			20 years
Share-Based Payment Arrangement, Option [Member]
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in Shares)			23,500
Proceeds from Stock Options Exercised			$ 39,175
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in Shares)			307,000
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)			$ 4.44
Share-Based Payment Arrangement, Option [Member] | Minimum [Member]
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price (in Dollars per share)	$ 1.2		1.2
Share-Based Payment Arrangement, Option [Member] | Maximum [Member]
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price (in Dollars per share)	$ 3.62		$ 3.62
Three Customers [Member] | Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member]
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Concentration Risk, Percentage			75.00%
Two Customers [Member] | Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member]
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Concentration Risk, Percentage				66.00%
Two Customers [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Concentration Risk, Percentage					73.00%
One Customer [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Concentration Risk, Percentage			67.00%
One Vendor [Member] | Accounts Payable [Member] | Customer Concentration Risk [Member]
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Concentration Risk, Percentage			85.00%	62.00%
One Vendor [Member] | Accounts Payable [Member] | Supplier Concentration Risk [Member]
SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Concentration Risk, Percentage			80.00%		17.00%

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