Note 5 - Property, Plant, and Equipment - Major Classes of Property, Plant, and Equipment (Details) - USD ($)	Nov. 30, 2021	Nov. 30, 2020
Property, plant and equipment, gross	$ 19,754,010	$ 19,261,995
Less accumulated depreciation	(14,516,682)	(14,043,333)
Property, plant and equipment	5,237,328	5,218,662
Land [Member]
Property, plant and equipment, gross	220,503	220,503
Building and Building Improvements [Member]
Property, plant and equipment, gross	7,460,698	7,255,955
Construction in Progress [Member]
Property, plant and equipment, gross	160,353	31,571
Machinery and Equipment [Member]
Property, plant and equipment, gross	11,286,411	11,123,104
Vehicles [Member]
Property, plant and equipment, gross	510,986	510,955
Furniture and Fixtures [Member]
Property, plant and equipment, gross	$ 115,059	$ 119,907

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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