Note 7 - Loan and Credit Agreements (Detail) - Summary Of Term Debt (Parentheticals) (USD $)	3 Months Ended			9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	1 Months Ended		9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
	Aug. 31, 2012	Sep. 15, 2010	Jun. 30, 2009	Aug. 31, 2012 West Bank [Member] Number 1 [Member]	Nov. 30, 2011 West Bank [Member] Number 1 [Member]	Aug. 31, 2012 West Bank [Member] Number 2 [Member]	Nov. 30, 2011 West Bank [Member] Number 2 [Member]	Aug. 31, 2012 West Bank [Member] Number 3 [Member]	Nov. 30, 2011 West Bank [Member] Number 3 [Member]	Aug. 31, 2012 West Bank [Member] Number 4 [Member]	Nov. 30, 2011 West Bank [Member] Number 4 [Member]	May 31, 2017 West Bank [Member]	May 31, 2017 US Bank [Member]	Aug. 31, 2012 US Bank [Member]	Nov. 30, 2011 US Bank [Member]	Aug. 31, 2012 Iowa Finance Authority [Member]	Nov. 30, 2011 Iowa Finance Authority [Member]	Aug. 31, 2012 IDED [Member] Number 1 [Member]	Nov. 30, 2011 IDED [Member] Number 1 [Member]	Aug. 31, 2012 IDED [Member] Number 2 [Member]	Nov. 30, 2011 IDED [Member] Number 2 [Member]	Aug. 31, 2012 IDED [Member] Number 3 [Member]	Nov. 30, 2011 IDED [Member] Number 3 [Member]	Aug. 31, 2012 West Union Community Development Corp [Member]	Nov. 30, 2011 West Union Community Development Corp [Member]
Monthly Installments (in Dollars)	$ 1,583			$ 42,500	$ 42,500	$ 11,000	$ 11,000	$ 12,550	$ 12,550	$ 27,800	$ 27,800	$ 666,000	$ 283,500	$ 11,700	$ 11,700	$ 12,892	$ 12,892	$ 2,437	$ 2,437	$ 813	$ 813	$ 0	$ 0	$ 4,333	$ 4,333
Interest Rate		0.00%	0.00%	4.75%	4.75%	4.75%	4.75%	4.75%	4.75%	4.50%	4.50%			3.15%	3.15%	3.50%	3.50%	6.00%	6.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%