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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

May 31, 2022

Accounting Policies [Abstract]

Schedule of Inventory, Current [Table Text Block]

	May 31,
	2022			2021
Raw materials	$	1,717,000		$	1,812,000
Work in progress		763,000			1,687,000
Finished products		782,000			1,324,000
Total gross inventory	$	3,262,000		$	4,823,000
Inventory reserve		(846,000)			(1,617,000)
Net inventory	$	2,416,000		$	3,206,000

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

			For the year ended May 31,
			2022			2021
Dividend yield			0%			0%
Expected volatility			102.54 - 105.48%			71.19 - 107.53%
Risk free interest rate			0.97-2.75%			0.34-1.18%
Expected term			5.50-6.25 Years			5.50-6.25 Years

Disaggregation of Revenue [Table Text Block]

		For the year ended May 31,
		2022			2021
Physician's office		$	14,259,000		$	2,801,000
Clinical lab			3,064,000			3,077,000
Over-the-counter			1,089,000			766,000
Contract manufacturing			459,000			555,000
Total		$	18,871,000		$	7,199,000

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