Leases (Details) - Schedule of right-of-use assets and operating lease liabilities - USD ($)	Aug. 31, 2020	May 31, 2020
Schedule of right-of-use assets and operating lease liabilities [Abstract]
Right-of-use assets	$ 322,371	$ 377,182
Current operating lease liabilities	170,915
Long-term operating lease liabilities	155,732	$ 192,409
Total operating lease liabilities	$ 326,647