SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - Revenue from contracts with customers - USD ($)	12 Months Ended
	May 31, 2020	May 31, 2019
Disaggregation of Revenue [Line Items]
Revenue From Customers	$ 6,692,711	$ 5,200,682
Clinical Lab [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	2,922,425	4,043,993
OTC [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	1,269,535	868,605
Physicians Office [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	2,194,991	170,871
Contract Manufacturing [Member]
Disaggregation of Revenue [Line Items]
Revenue From Customers	$ 305,760	$ 117,213