Note 6 - Property, Plant, and Equipment - Major Classes of Property, Plant, and Equipment (Details) - USD ($)	Nov. 30, 2024	Nov. 30, 2023
Property, plant and equipment, gross	$ 19,082,262	$ 18,480,726
Less accumulated depreciation	(13,931,392)	(13,420,131)
Property, plant and equipment	5,150,870	5,060,595
Land [Member]
Property, plant and equipment, gross	70,503	70,503
Building and Building Improvements [Member]
Property, plant and equipment, gross	7,419,101	7,332,416
Construction in Progress [Member]
Property, plant and equipment, gross	86,284	0
Machinery and Equipment [Member]
Property, plant and equipment, gross	10,821,463	10,386,044
Vehicles [Member]
Property, plant and equipment, gross	569,852	576,704
Furniture and Fixtures [Member]
Property, plant and equipment, gross	$ 115,059	$ 115,059