Note 5 - Property, Plant, and Equipment (Details) - Major Classes of Property, Plant, and Equipment (USD $)	Nov. 30, 2013		Nov. 30, 2012
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 26,047,855	[1]	$ 23,077,653
Less accumulated depreciation	(14,147,653)	[1]	(13,514,955)
Property, plant and equipment	11,900,202	[1]	9,562,698
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,188,155	[1]	1,038,154
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	10,315,222	[1]	9,178,964
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	404,016	[1]	444,221
Manufacturing Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	13,555,073	[1]	11,872,993
Trucks and Automobiles [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	436,367	[1]	396,308
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 149,022	[1]	$ 147,013

[1] includes assets purchased with Ohio Metal and Agro Trend acquisitions