Note 9 - Loan and Credit Agreements (Detail) (USD $)	0 Months Ended	12 Months Ended										12 Months Ended						12 Months Ended					12 Months Ended		1 Months Ended		1 Months Ended	12 Months Ended
	May 10, 2012	Nov. 30, 2012	Feb. 28, 2013	May 31, 2012	Apr. 26, 2012	Nov. 30, 2011	Sep. 15, 2010	May 31, 2010	Nov. 30, 2007	Oct. 09, 2007	Jun. 07, 2007	Nov. 30, 2012 After Restructuring [Member] IDEA Note 1 [Member]	Nov. 30, 2012 After Restructuring [Member] IDEA Note 2 [Member]	Nov. 30, 2011 Minimum Debt Service Coverage Ratio [Member] West Bank [Member]	Nov. 30, 2012 Universal Harvester Co [Member]	Nov. 30, 2012 West Bank [Member]	Apr. 26, 2012 West Bank [Member]	Nov. 30, 2012 West Bank Loan 1 [Member]	Nov. 30, 2011 West Bank Loan 1 [Member]	Nov. 30, 2012 West Bank Loan 2 [Member]	Nov. 30, 2011 West Bank Loan 2 [Member]	Apr. 26, 2012 West Bank Loan 2 [Member]	Nov. 30, 2012 Dubuque Construction [Member]	Apr. 26, 2012 Dubuque Construction [Member]	Jun. 30, 2009 IDEA Note 1 [Member]	Jun. 30, 2009 IDEA Note 2 [Member]	May 30, 2010 IFA Loan [Member]	Nov. 30, 2012 IFA Loan [Member]	Nov. 30, 2011 IFA Loan [Member]	Nov. 30, 2013 WUCDC Loan [Member]	Nov. 30, 2012 WUCDC Loan [Member]	Nov. 30, 2011 WUCDC Loan [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 6,000,000
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum		4.00%
Line of Credit Facility, Amount Outstanding		0				1,389,000
Line of Credit Facility, Remaining Borrowing Capacity		6,000,000				4,611,000
Line of Credit Facility, Borrowing Capacity, Description		60%
Debt Instrument, Face Amount	880,000			2,000,000	1,074,000		13,000	1,300,000	1,500,000	1,330,000	4,100,000						2,659,000								95,000	95,000
Long-term Debt	824,000	8,466,134				6,456,121						42,000	15,000		1,875,000	2,435,000		2,435,359	2,804,403	1,027,330	1,102,321	1,027,000		1,168,000				1,027,000	1,143,140		4,000	8,667
Debt Instrument, Interest Rate, Stated Percentage	3.15%		2.75%	4.50%								6.00%				4.75%		5.75%	5.75%	5.75%	5.75%	4.75%		4.75%	0.00%			3.50%	3.50%		0.00%	0.00%
Debt Instrument, Periodic Payment	11,700											2,437	813		27,800			42,500	42,500	11,000	11,000		12,550		1,583		12,900	12,892	12,892		4,333	4,333
Term Loan Final Payment	283,500														666,000			536,000		628,000			711,000
Construction Loan					1,221,000
Debt Instrument, Covenant Description		If the Company fails to make a required payment or perform or observe any agreement or covenant under the U.S. Bank Loan, commits and fails to cure a default under the terms of any of our other loan obligations in excess of $10,000, becomes subject to bankruptcy, insolvency proceedings, or a judgment in an amount exceeding $10,000, if there is a determination that any of the representations made in the U.S. Bank Loan or ancillary documents are untrue or materially misleading or if there is a material adverse change in our business, we will be deemed to be in default under the U.S. Bank Loan.If the Company does not cure the default within the applicable cure period, the lender may cause the entire amount of the loan to be immediately due and payable or may increase the interest rate to a rate of 5.00% per annum, plus the interest rate otherwise payable under the U.S. Bank Loan.												1.25
Promissory Notes Number of Monthly Payments																									60
Increase (Decrease) in Other Loans		49,000
Debt Instrument, Periodic Payment, Principal																														$ 4,333.33	$ 4,333.33	$ 4,333.33