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SIGNIFICANT ACCOUNTING POLICIES (Details) - Revenue from contracts with customers - USD ($)	3 Months Ended		6 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue From Customers	$ 1,372,526	$ 1,596,408	$ 2,516,332	$ 2,790,823
Clinical Lab [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	892,804	1,144,172	1,474,512	2,034,228
Lab Supplies [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	2,884		2,884
OTC [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	272,223	320,785	457,131	520,109
Physicians Office [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	153,273	79,226	350,604	124,493
Contract Manufacturing [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	$ 51,342	$ 52,225	$ 231,201	$ 111,993

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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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