Leases (Details Narrative) - USD ($)	9 Months Ended
	Feb. 28, 2022	Feb. 28, 2021
Lessee, Lease, Description [Line Items]
Finance lease cost	$ 1,995,467	$ 2,156,029
Amortization of assets	$ 721,923	$ 758,902
Equipment One [Member]
Lessee, Lease, Description [Line Items]
Operating lease term	52 months
Operating lease discount rate	5.40%
Equipment Two [Member]
Lessee, Lease, Description [Line Items]
Operating lease term	48 months
Operating lease discount rate	5.40%
Yorktown Production Equipment [Member] | Sale and Leaseback Agreement [Member]
Lessee, Lease, Description [Line Items]
Value of production equipment purchased	$ 968,168
Lease maturity date	Dec. 27, 2022
Bargain purchase option amount	$ 10,000
Yorktown Production Equipment [Member] | Sale and Leaseback Agreement [Member] | Initial Thirty Six Months [Member]
Lessee, Lease, Description [Line Items]
Payments of monthly rental amount	27,915
Yorktown Production Equipment [Member] | Sale and Leaseback Agreement [Member] | Twelve Months [Member]
Lessee, Lease, Description [Line Items]
Payments of monthly rental amount	7,695
Production Equipment [Member] | Non- Cancelable Financing Leases [Member]
Lessee, Lease, Description [Line Items]
Production equipment gross carrying amount	8,473,357
Three Lease Agreements with Five Year Terms [Member]
Lessee, Lease, Description [Line Items]
Finance lease cost	$ 6,900,000
Lease term	5 years
Lease interest rate	7.40%
Lease payment per invoice rate	$ 3.32
Payments of monthly rental amount	$ 130,000