Note 8 - Loan and Credit Agreements - Summary Of Term Debt (Details) (Parentheticals) - USD ($)	9 Months Ended	12 Months Ended
	Aug. 31, 2017	Nov. 30, 2016
US Bank Loan 2 [Member]
Debt instrument, interest rate, stated percentage	5.00%	5.00%
Debt instrument, periodic payment	$ 9,600	$ 9,600
US Bank Loan 3 [Member]
Debt instrument, interest rate, stated percentage	5.00%	5.00%
Debt instrument, periodic payment	$ 10,965	$ 10,965
US Bank Loan 4 [Member]
Debt instrument, interest rate, stated percentage	5.00%	5.00%
Debt instrument, periodic payment	$ 26,107	$ 26,107
US Bank Loan 5 [Member]
Debt instrument, interest rate, stated percentage	5.00%	5.00%
Debt instrument, periodic payment	$ 10,960	$ 10,960
US Bank Loan 6 [Member]
Debt instrument, interest rate, stated percentage	5.00%	5.00%
Debt instrument, periodic payment	$ 4,301	$ 4,301
Iowa Finance Authority Term Loan [Member]
Debt instrument, interest rate, stated percentage	2.75%	2.75%
Debt instrument, periodic payment	$ 12,500	$ 12,500