Note 4 - Property (Details) - Property, Plant, and Equipment (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 77,010	$ 77,266
Less accumulated depreciation	38,828	37,084
Net property	38,182	40,182
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	5,099	5,355
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	24,951	24,951
Building [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	33,534	33,534
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	11,820	11,820
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 1,606	$ 1,606