SIGNIFICANT ACCOUNTING POLICIES (Details) - Revenue from contracts with customers - USD ($)	3 Months Ended		6 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Disaggregation of Revenue [Line Items]
Revenue From Customers	$ 4,647,000	$ 1,373,000	$ 5,909,000	$ 2,516,000
Physicians Office [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	3,359,000	153,000	3,616,000	351,000
Clinical Lab [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	642,000	893,000	1,528,000	1,475,000
Over-the-counter [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	534,000	272,000	613,000	457,000
Contract Manufacturing [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	$ 112,000	$ 55,000	$ 152,000	$ 233,000