Note 6 - Property, Plant, and Equipment - Major Classes of Property, Plant, and Equipment (Details) - USD ($)	Nov. 30, 2023	Nov. 30, 2022
Property, plant and equipment, gross	$ 18,480,726	$ 18,834,142
Less accumulated depreciation	(13,420,131)	(13,888,917)
Property, plant and equipment	5,060,595	4,945,225
Land [Member]
Property, plant and equipment, gross	70,503	70,503
Building and Building Improvements [Member]
Property, plant and equipment, gross	7,332,416	7,079,047
Construction in Progress [Member]
Property, plant and equipment, gross	0	354,494
Machinery and Equipment [Member]
Property, plant and equipment, gross	10,386,044	10,668,224
Vehicles [Member]
Property, plant and equipment, gross	576,704	546,815
Furniture and Fixtures [Member]
Property, plant and equipment, gross	$ 115,059	$ 115,059