Note 7 - Loan and Credit Agreements - Summary Of Term Debt (Details) - USD ($)	May. 31, 2015	Nov. 30, 2014
US Bank Loan 1 [Member]
U.S. Bank loan payable in monthly installments of $42,500 including interest at 2.98%, due May 1, 2018	$ 1,430,781	$ 1,662,311
US Bank Loan 2 [Member]
U.S. Bank loan payable in monthly installments of $42,500 including interest at 2.98%, due May 1, 2018	797,347	850,930
US Bank Loan 3 [Member]
U.S. Bank loan payable in monthly installments of $42,500 including interest at 2.98%, due May 1, 2018	904,682	965,889
US Bank Loan 4 [Member]
U.S. Bank loan payable in monthly installments of $42,500 including interest at 2.98%, due May 1, 2018	1,260,742	1,407,366
US Bank Loan 5 [Member]
U.S. Bank loan payable in monthly installments of $42,500 including interest at 2.98%, due May 1, 2018	526,776	588,101
US Bank Loan 6 [Member]
U.S. Bank loan payable in monthly installments of $42,500 including interest at 2.98%, due May 1, 2018	962,183	980,940
Iowa Finance Authority [Member]
U.S. Bank loan payable in monthly installments of $42,500 including interest at 2.98%, due May 1, 2018	712,784	777,689
U.S. Bank loan payable in monthly installments of $42,500 including interest at 2.98%, due May 1, 2018	6,595,295	7,233,226
Less current portion of term debt	1,302,741	1,283,897
Term debt, excluding current portion	$ 5,292,554	$ 5,949,329