Annual report pursuant to Section 13 and 15(d)

CONTINGENT LIABILITY (Details)

v3.21.2
CONTINGENT LIABILITY (Details) - USD ($)
12 Months Ended
Feb. 16, 2021
May 31, 2021
May 31, 2020
May 31, 2019
Jun. 27, 2018
CONTINGENT LIABILITY (Details) [Line Items]          
Business Combination, Liabilities Arising from Contingencies, Amount Recognized       $ 1,000,000  
Business Combination, Contingent Consideration, Liability, Current   $ 0 $ 150,000 1,000,000 $ 678,111
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability $ 106,195 $ 6,105,679 0 $ 321,889  
Payment for Contingent Consideration Liability, Operating Activities     850,000    
Deposit Assets     $ 150,000    
Taxes Paid by the Company [Member]          
CONTINGENT LIABILITY (Details) [Line Items]          
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability 41,805        
Other Expense [Member]          
CONTINGENT LIABILITY (Details) [Line Items]          
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability $ 2,000