SIGNIFICANT ACCOUNTING POLICIES (Details) - Revenue from contracts with customers - USD ($)	3 Months Ended		9 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022
Disaggregation of Revenue [Line Items]
Revenue From Customers	$ 1,112,000	$ 7,660,000	$ 4,231,000	$ 13,569,000
Clinical Lab [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	532,000	731,000	2,580,000	2,259,000
Over-the-counter [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	292,000	244,000	971,000	857,000
Contract Manufacturing [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	284,000	167,000	431,000	319,000
Physicians Office [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	$ 4,000	$ 6,518,000	$ 249,000	$ 10,134,000