Note 6 - Property, Plant, and Equipment - Major Classes of Property, Plant, and Equipment (Details) - USD ($)	Nov. 30, 2018	Nov. 30, 2017
Property, plant and equipment, gross	$ 18,917,769	$ 18,676,666
Less accumulated depreciation	(13,270,284)	(12,729,709)
Property, plant and equipment	5,647,485	5,946,957
Land [Member]
Property, plant and equipment, gross	220,503	220,503
Building and Building Improvements [Member]
Property, plant and equipment, gross	6,985,273	6,966,550
Construction in Progress [Member]
Property, plant and equipment, gross	35,669	14,798
Machinery and Equipment [Member]
Property, plant and equipment, gross	11,062,856	10,932,085
Vehicles [Member]
Property, plant and equipment, gross	491,822	428,774
Furniture and Fixtures [Member]
Property, plant and equipment, gross	$ 121,646	$ 113,956

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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