LEASES (Details) - Supplemental cash flow information related to leases	3 Months Ended
	Aug. 31, 2021 USD ($)
Supplemental cash flow information related to leases [Abstract]
Operating cash flows from operating leases	$ 80,697
Right-of-use assets obtained in exchange for
Right-of-use assets obtained in exchange for new operating lease liabilities
Weighted average remaining lease term (in years)	5 years 7 days
Weighted average discount rate	6.50%