SIGNIFICANT ACCOUNTING POLICIES (Details) - Revenue from contracts with customers - USD ($)	3 Months Ended		6 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue From Customers	$ 1,482,000	$ 4,647,000	$ 3,119,000	$ 5,909,000
Clinical Lab [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	902,000	642,000	2,048,000	1,528,000
Over-the-counter [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	466,000	534,000	679,000	613,000
Physicians Office [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	62,000	3,359,000	245,000	3,616,000
Contract Manufacturing [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	$ 52,000	$ 112,000	$ 147,000	$ 152,000