Note 5 - Property, Plant, and Equipment - Major Classes of Property, Plant, and Equipment (Details) - USD ($)	Nov. 30, 2020	Nov. 30, 2019
Property, plant and equipment, gross	$ 19,261,995	$ 19,002,613
Less accumulated depreciation	(14,043,333)	(13,639,706)
Property, plant and equipment	5,218,662	5,362,907
Land [Member]
Property, plant and equipment, gross	220,503	220,503
Building and Building Improvements [Member]
Property, plant and equipment, gross	7,255,955	7,035,144
Construction in Progress [Member]
Property, plant and equipment, gross	31,571	82,366
Machinery and Equipment [Member]
Property, plant and equipment, gross	11,123,104	11,036,192
Vehicles [Member]
Property, plant and equipment, gross	510,955	507,575
Furniture and Fixtures [Member]
Property, plant and equipment, gross	$ 119,907	$ 120,833

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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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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