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SIGNIFICANT ACCOUNTING POLICIES (Details) - Revenue from contracts with customers - USD ($)	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Disaggregation of Revenue [Line Items]
Revenue From Customers	$ 3,629,000	$ 1,177,000	$ 6,145,000	$ 3,968,000
Clinical Lab [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	967,000	723,000	2,441,000	2,769,000
Lab Supplies [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers			3,000
OTC [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	148,000	271,000	605,000	778,000
Physicians Office [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	2,384,000	32,000	2,735,000	157,000
Contract Manufacturing [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	$ 130,000	$ 151,000	$ 361,000	$ 264,000

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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