Note 10 - Loan and Credit Agreements - Summary of Term Debt (Details) (Parentheticals) - USD ($)	12 Months Ended
	Nov. 30, 2017	Nov. 30, 2016
US Bank Loan 1 [Member]
Debt instrument, periodic payment		$ 11,000
Debt instrument, interest rate, stated percentage		2.98%
US Bank Loan 2 [Member]
Debt instrument, periodic payment		$ 12,550
Debt instrument, interest rate, stated percentage		2.98%
US Bank Loan 3 [Member]
Debt instrument, periodic payment		$ 27,800
Debt instrument, interest rate, stated percentage		2.98%
US Bank Loan 4 [Member]
Debt instrument, periodic payment		$ 11,700
Debt instrument, interest rate, stated percentage		3.15%
US Bank Loan 5 [Member]
Debt instrument, periodic payment		$ 5,556
Debt instrument, interest rate, stated percentage		2.98%
Term Loan Due October 2037 [Member]
Debt instrument, periodic payment	$ 17,271
Debt instrument, interest rate, stated percentage	5.00%
Term Loan Due October 2019 [Member]
Debt instrument, periodic payment	$ 3,249
Debt instrument, interest rate, stated percentage	5.00%
Iowa Finance Authority Term Loan [Member]
Debt instrument, periodic payment	$ 12,500	$ 12,500
Debt instrument, interest rate, stated percentage	2.75%	2.75%