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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - Revenue from contracts with customers - USD ($)
 12 Months Ended
May 31, 2022
May 31, 2021
Disaggregation of Revenue [Line Items]    
Revenue From Customers $ 18,871,000 $ 7,199,000
Physicians Office [Member]    
Disaggregation of Revenue [Line Items]    
Revenue From Customers 14,259,000 2,801,000
Clinical Lab [Member]    
Disaggregation of Revenue [Line Items]    
Revenue From Customers 3,064,000 3,077,000
Over-the-counter [Member]    
Disaggregation of Revenue [Line Items]    
Revenue From Customers 1,089,000 766,000
Contract Manufacturing [Member]    
Disaggregation of Revenue [Line Items]    
Revenue From Customers $ 459,000 $ 555,000