Note 7 - Loan and Credit Agreements (Details) - Summary Of Term Debt (USD $)	Aug. 31, 2013	Nov. 30, 2012
Note 7 - Loan and Credit Agreements (Details) - Summary Of Term Debt [Line Items]
Term Loans	$ 7,786,532	$ 8,466,134
Less current portion of term debt	1,229,308	1,165,177
Term debt, excluding current portion	6,557,224	7,300,957
US Bank Loan 1 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary Of Term Debt [Line Items]
Term Loans	2,225,507	2,435,359
US Bank Loan 2 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary Of Term Debt [Line Items]
Term Loans	981,100	1,027,330
US Bank Loan 3 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary Of Term Debt [Line Items]
Term Loans	1,114,586	1,167,725
US Bank Loan 4 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary Of Term Debt [Line Items]
Term Loans	1,763,897	1,875,120
US Bank Loan 5 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary Of Term Debt [Line Items]
Term Loans	736,983	823,555
Iowa Finance Authority [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary Of Term Debt [Line Items]
Term Loans	935,733	1,027,366
IDED [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary Of Term Debt [Line Items]
Term Loans	21,402	41,866
IDED Note 1 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary Of Term Debt [Line Items]
Term Loans	7,324	14,649
IDED Note 2 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary Of Term Debt [Line Items]
Term Loans	0	48,830
West Union Community Development Corp [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary Of Term Debt [Line Items]
Term Loans	$ 0	$ 4,334