Note 6 - Property, Plant, and Equipment - Major Classes of Property, Plant, and Equipment (Details) - USD ($)	Nov. 30, 2019	Nov. 30, 2018
Property, plant and equipment, gross	$ 19,002,613	$ 18,917,769
Less accumulated depreciation	(13,639,706)	(13,270,284)
Property, plant and equipment	5,362,907	5,647,485
Land [Member]
Property, plant and equipment, gross	220,503	220,503
Building and Building Improvements [Member]
Property, plant and equipment, gross	7,035,144	6,985,273
Construction in Progress [Member]
Property, plant and equipment, gross	82,366	35,669
Machinery and Equipment [Member]
Property, plant and equipment, gross	11,036,192	11,062,856
Vehicles [Member]
Property, plant and equipment, gross	507,575	491,822
Furniture and Fixtures [Member]
Property, plant and equipment, gross	$ 120,833	$ 121,646

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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