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Note 4 - Property - Property, Plant, and Equipment (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Land [Member]    
Property, plant, and equipment, gross $ 5,151 $ 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 11,728 11,813
Property, plant, and equipment, gross 69,911 75,401
Less accumulated depreciation (36,056) (39,335)
Net property $ 33,855 $ 36,066