Note 4 - Contracts in Progress - Long-term Contracts (Details) - USD ($)	Nov. 30, 2022	Nov. 30, 2021
Costs in Excess of Billings, Cost	$ 848,516	$ 362,958
Billings in Excess of Costs, Costs	731,490	924,908
Costs in Excess of Billings, Estimated Earnings 1	293,094	117,328
Billings in Excess of Costs, Estimated Earnings	138,568	301,180
Costs in Excess of Billings, Costs and Estimated Earnings	1,141,610	480,286
Billings in Excess of Costs, Costs and Estimated Earnings	870,058	1,226,088
Costs in Excess of Billings, Amounts Billed	(690,704)	(303,002)
Billings in Excess of Costs, Amounts Billed	(1,198,099)	(1,506,849)
Cost and Profit in Excess of Billings	450,906	177,284
Billings in Excess of Cost	$ (328,041)	$ (280,761)