Note 5 - Contracts in Progress - Long-term Contracts (Details) - USD ($)	Nov. 30, 2019	Nov. 30, 2018
Costs in Excess of Billings, Cost	$ 3,805,906	$ 190,861
Billings in Excess of Costs, Costs	629,501	99,782
Costs in Excess of Billings, Estimated Earnings	1,044,612	54,721
Billings in Excess of Costs, Estimated Earnings	155,790	121,115
Costs in Excess of Billings, Costs and Estimated Earnings	4,850,518	245,582
Billings in Excess of Costs, Costs and Estimated Earnings	785,291	220,897
Costs in Excess of Billings, Amounts Billed	(4,123,851)	(146,295)
Billings in Excess of Costs, Amounts Billed	(874,222)	(405,911)
Cost and Profit in Excess of Billings	726,667	99,287
Billings in Excess of Cost	$ (88,931)	$ (185,014)