Note 10 - Loan and Credit Agreements - Summary of Term Debt (Details) (Parentheticals) - USD ($)	9 Months Ended	12 Months Ended
	Aug. 31, 2020	Nov. 30, 2019
Term Loan Due October 2037 [Member]
Debt instrument, periodic payment	$ 17,271	$ 17,271
Debt instrument, interest rate, stated percentage	5.00%	5.00%
Term Loan Due April 2022 [Member]
Debt instrument, interest rate, stated percentage	1.00%
SBA Loan One [Member]
Debt instrument, periodic payment	$ 731
Debt instrument, interest rate, stated percentage	3.75%
SBA Loan Two [Member]
Debt instrument, periodic payment	$ 731
Debt instrument, interest rate, stated percentage	3.75%
SBA Loan Three [Member]
Debt instrument, periodic payment	$ 731
Debt instrument, interest rate, stated percentage	3.75%