Note 7 - Loan and Credit Agreements (Details) - Summary of Term Debt (USD $)	Aug. 31, 2014	Nov. 30, 2013
Note 7 - Loan and Credit Agreements (Details) - Summary of Term Debt [Line Items]
Term debt	$ 7,547,729	$ 7,480,923
Less current portion of term debt	1,274,192	1,228,964
Term debt, excluding current portion	6,273,537	6,251,959
US Bank Loan 1 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary of Term Debt [Line Items]
Term debt	1,776,571	2,114,675
US Bank Loan 2 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary of Term Debt [Line Items]
Term debt	877,316	955,507
US Bank Loan 3 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary of Term Debt [Line Items]
Term debt	996,030	1,085,350
US Bank Loan 4 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary of Term Debt [Line Items]
Term debt	1,479,680	1,693,752
US Bank Loan 5 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary of Term Debt [Line Items]
Term debt	618,322	707,719
US Bank Loan 6 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary of Term Debt [Line Items]
Term debt	990,092	0
Iowa Finance Authority [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary of Term Debt [Line Items]
Term debt	809,718	904,662
IDED Note 1 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary of Term Debt [Line Items]
Term debt	0	14,375
IDED Note 2 [Member]
Note 7 - Loan and Credit Agreements (Details) - Summary of Term Debt [Line Items]
Term debt	$ 0	$ 4,883