Long-Term Debt - Schedule of Long-Term Debt (Details) (Parenthetical) - USD ($)	6 Months Ended	12 Months Ended
	Nov. 30, 2019	May 31, 2019
Term Loan A Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 4.0%, Maturing April 30, 2023 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	0.50%	0.50%
Debt instrument maturity date	Apr. 30, 2023	Apr. 30, 2023
Term Loan A Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 4.0%, Maturing April 30, 2023 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	4.00%	4.00%
Term Loan C Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 4.0%, Maturing August 4, 2024 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	0.50%	0.50%
Debt instrument maturity date	Aug. 04, 2024	Aug. 04, 2024
Term Loan C Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 4.0%, Maturing August 4, 2024 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	4.00%	4.00%
Term Loan D Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 4.75%, Maturing January 10, 2022 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	0.50%	0.50%
Debt instrument maturity date	Jan. 10, 2022	Jan. 10, 2022
Term Loan D Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 4.75%, Maturing January 10, 2022 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	4.75%	4.75%
Term Loan E Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 4.75%, Maturing January 10, 2022 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	0.50%	0.50%
Debt instrument maturity date	Jan. 10, 2022	Jan. 10, 2022
Term Loan E Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 4.75%, Maturing January 10, 2022 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	4.75%	4.75%
Term Loan F Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 5.25%, Maturing February 8, 2021 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	0.50%	0.50%
Debt instrument maturity date	Feb. 08, 2021	Feb. 08, 2021
Term Loan F Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 5.25%, Maturing February 8, 2021 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.25%	5.25%
Term Loan G Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 5.25%, Maturing April 30, 2024 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	0.50%	0.50%
Debt instrument maturity date	Apr. 30, 2024	Apr. 30, 2024
Term Loan G Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 5.25%, Maturing April 30, 2024 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.25%	5.25%
Term Loan H Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 5.25%, Maturing January 1, 2022 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	0.50%	0.50%
Debt instrument maturity date	Jan. 01, 2022	Jan. 01, 2022
Term Loan H Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 5.25%, Maturing January 1, 2022 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.25%	5.25%
Revolving Loan Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 5.5%, Due January 31, 2021 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	0.50%	0.50%
Debt instrument maturity date	Jan. 31, 2021	Jan. 31, 2021
Revolving Loan Payable to International Bank of Commerce, Prime Rate of Interest Plus 0.5% But Not Less Than 5.5%, Due January 31, 2021 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.50%	5.50%
Note Payable to First Bank, Prime Rate of Interest Plus 1.45% But Not Less Than 4.95%, Monthly Principal and Interest Payment of $30,628, Due August 21, 2021, Secured by Production Equipment [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	1.45%	1.45%
Debt instrument maturity date	Aug. 21, 2021	Aug. 21, 2021
Debt instrument principal and interest amount	$ 30,628	$ 30,628
Note Payable to First Bank, Prime Rate of Interest Plus 1.45% But Not Less Than 4.95%, Monthly Principal and Interest Payment of $30,628, Due August 21, 2021, Secured by Production Equipment [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	4.95%	4.95%
Term Loan Payable by GRE to International Bank of Commerce, Interest Rate of 5.5%, Monthly Principal and Interest Payment of $27,688, Due April 30, 2023 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.50%	5.50%
Debt instrument maturity date	Apr. 30, 2023	Apr. 30, 2023
Debt instrument principal and interest amount	$ 27,688	$ 27,688
Note Payable to Robert Rosene, 7.5% Interest, Due January 15, 2021 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	7.50%	7.50%
Debt instrument maturity date	Jan. 15, 2021	Jan. 15, 2021