Note 5 - Property, Plant, and Equipment - Major Classes of Property, Plant, and Equipment (Details) (USD $)	Nov. 30, 2014	Nov. 30, 2013
Property, plant and equipment, gross	$ 26,519,207	$ 26,047,855
Less accumulated depreciation	(14,838,415)	(14,147,653)
Property, plant and equipment	11,680,792	11,900,202
Building and Building Improvements [Member]
Property, plant and equipment, gross	10,542,327	10,315,222
Construction in Progress [Member]
Property, plant and equipment, gross	107,807	404,016
Furniture and Fixtures [Member]
Property, plant and equipment, gross	149,022	149,022
Land [Member]
Property, plant and equipment, gross	1,188,155	1,188,155
Manufacturing Machinery and Equipment [Member]
Property, plant and equipment, gross	14,097,934	13,555,073
Trucks and Automobiles [Member]
Property, plant and equipment, gross	$ 433,962	$ 436,367