Federal Income Taxes - Summary of Deferred Taxes (Details) - USD ($)	May 31, 2020	May 31, 2019
Income Tax Disclosure [Abstract]
Net operating loss carryforward	$ 3,355,844	$ 4,807,616
Accrued expenses	35,445	88,298
Inventory	91,440	33,528
Total deferred tax asset	3,482,729	4,929,442
Depreciation and amortization, tax reporting in excess of financial	(2,990,647)	(2,877,573)
Valuation allowance	(1,601,134)	(2,978,511)
Net deferred tax liability	$ (1,109,052)	$ (926,642)