Note 4 - Property - Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Land [Member]
Property, plant, and equipment, gross	$ 5,133	$ 5,158
Land Improvements [Member]
Property, plant, and equipment, gross	20,340	24,951
Building [Member]
Property, plant, and equipment, gross	32,692	33,479
Machinery and Equipment [Member]
Property, plant, and equipment, gross	11,727	11,813
Property, plant, and equipment, gross	69,892	75,401
Less accumulated depreciation	(36,562)	(39,335)
Net property	$ 33,330	$ 36,066