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Note 10 - Property, Plant and Equipment - Property, Plant and Equipment Components (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Gross property, plant and equipment $ 72,717 $ 66,911
Accumulated depreciation (58,062) (51,337)
Property plant and equipment net 14,655 15,574
Capital Leased Assets, Gross 4,272 4,264
Accumulated depreciation (976) (548)
Capital Leased Assets, Net 3,296 3,716
Land and Land Improvements [Member]    
Gross property, plant and equipment 219 219
Building and Building Improvements [Member]    
Gross property, plant and equipment 11,178 11,140
Capital Leased Assets, Gross 2,995 2,987
Machinery, Equipment, Furniture, and Fixtures [Member]    
Capital Leased Assets, Gross 1,277 1,277
Property, Plant and Equipment, Other Types [Member]    
Gross property, plant and equipment 59,179 54,554
Construction in Progress [Member]    
Gross property, plant and equipment $ 2,141 $ 998