Note 4 - Contracts in Progress (Detail) - The amounts billed on these long term contracts are due 30 days from invoice date. All amounts bill (USD $)	Nov. 30, 2012	Nov. 30, 2011
Cost and Profit in Excess of Billings [Member]
Costs	$ 127,858	$ 1,275,286
Costs	127,858	1,275,286
Estimated earnings	42,200	604,199
Estimated earnings	42,200	604,199
Cost and earnings on uncompleted contracts	170,058	1,879,485
Cost and earnings on uncompleted contracts	170,058	1,879,485
Less: amounts billed	(68,000)	(1,714,755)
Net cost in excess of billings	102,058	164,730
Billings in Excess of Costs and Profit [Member]
Costs	4,994,950	271,593
Costs	4,994,950	271,593
Estimated earnings	2,932,023	135,785
Estimated earnings	2,932,023	135,785
Cost and earnings on uncompleted contracts	7,926,973	407,378
Cost and earnings on uncompleted contracts	7,926,973	407,378
Less: amounts billed	(9,052,639)	(481,430)
Billings in excess of cost	$ (1,125,666)	$ (74,052)