Income Taxes - Summary of Deferred Taxes (Details) - USD ($)	May 31, 2021	May 31, 2020
Income Tax Disclosure [Abstract]
Net operating loss carryforward	$ 2,487,650	$ 3,355,844
Accrued expenses		35,445
Inventory	7,620	91,440
Total deferred tax asset	2,495,270	3,482,729
Depreciation and amortization, tax reporting in excess of financial	(3,274,778)	(2,990,647)
Valuation allowance	(1,601,134)	(1,601,134)
Net deferred tax liability	$ (2,380,642)	$ (1,109,052)