Long-Term Debt - Schedule of Loan Agreement (Details) - IBC Loan Agreement [Member] - USD ($)	12 Months Ended
	May 31, 2019	May 31, 2018
Term Loan C [Member]
Debt issuance date	Aug. 04, 2017	Aug. 04, 2017
Debt principal amount	$ 1,795,000	$ 1,795,000
Debt maturity date	Aug. 04, 2020	Aug. 04, 2020
Purpose of loan	Acquisition of Equipment	Acquisition of Equipment
Term Loan D [Member]
Debt issuance date	Jan. 10, 2018	Jan. 10, 2018
Debt principal amount	$ 2,500,000	$ 2,500,000
Debt maturity date	Jan. 10, 2022	Jan. 10, 2022
Purpose of loan	Convert Revolver to Term	Convert Revolver to Term
Term Loan E [Member]
Debt issuance date	Jan. 10, 2018	Jan. 10, 2018
Debt principal amount	$ 1,000,000	$ 1,000,000
Debt maturity date	Jan. 10, 2022	Jan. 10, 2022
Purpose of loan	Acquisition of Equipment	Acquisition of Equipment
Term Loan F [Member]
Debt issuance date	Aug. 08, 2018	Aug. 08, 2018
Debt principal amount	$ 3,600,000	$ 3,600,000
Debt maturity date	Feb. 08, 2021	Feb. 08, 2021
Purpose of loan	Acquisition of Equipment	Acquisition of Equipment
Term Loan G [Member]
Debt issuance date	Apr. 30, 2019	Apr. 30, 2019
Debt principal amount	$ 880,000	$ 880,000
Debt maturity date	Apr. 30, 2024	Apr. 30, 2024
Purpose of loan	Acquisition of Real Estate	Acquisition of Real Estate