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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
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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)

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