Discontinued Operations (Details 1) - USD ($)	May 31, 2020	May 31, 2019
Discontinued Operations and Disposal Groups [Abstract]
Accounts receivable, net	$ 0	$ 1,365,114
Inventories	0	3,777,913
Prepaid expenses	0	49,357
Current assets held for sale	0	5,192,384
Property and equipment, net	0	85,967
Noncurrent assets held for sale	0	85,967
Accounts payable	0	393,773
Accrued commissions	0	128,453
Accrued payroll liabilities	0	127,124
Customer deposits and prepayments	0	109,860
Other accrued liabilities	0	89,939
Current liabilities held for sale	0	849,149
Net assets held for sale	$ 0	$ 4,429,202