Note 7 - Loan and Credit Agreements (Detail) - Summary Of Term Debt (USD $)	Feb. 28, 2013	Nov. 30, 2012	May 31, 2012	May 10, 2012	Sep. 15, 2010	May 31, 2010	Jun. 07, 2007
Long Term Debt	$ 8,193,941	$ 8,466,134	$ 2,000,000	$ 880,000	$ 13,000	$ 1,300,000	$ 4,100,000
Less current portion of term debt	1,180,751	1,165,177
Term debt, excluding current portion	7,013,190	7,300,957
West Bank [Member] | Loan 1 [Member]
Long Term Debt	2,337,035	2,435,359
West Bank [Member] | Loan 2 [Member]
Long Term Debt	1,006,721	1,027,330
West Bank [Member] | Loan 3 [Member]
Long Term Debt	1,144,158	1,167,725
West Bank [Member] | Loan 4 [Member]
Long Term Debt	1,812,864	1,875,120
US Bank [Member]
Long Term Debt	794,989	823,555
Iowa Finance Authority [Member]
Long Term Debt	997,656	1,027,366
IDED [Member] | Loan 1 [Member]
Long Term Debt	35,146	41,866
IDED [Member] | Loan 2 [Member]
Long Term Debt	12,208	14,649
IDED [Member] | Loan 3 [Member]
Long Term Debt	48,830	48,830
West Union Community Development Corp [Member]
Long Term Debt	$ 4,334	$ 4,334