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Note 7 - Property, Plant and Equipment - Property, Plant, and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Property, plant, and equipment $ 116,089 $ 111,779
Land and Land Improvements [Member]    
Property, plant, and equipment 3,191 3,191
Building and Building Improvements [Member]    
Property, plant, and equipment 35,502 35,187
Leasehold Improvements [Member]    
Property, plant, and equipment 3,022 2,843
Machinery and Equipment [Member]    
Property, plant, and equipment 66,438 62,440
Furniture, Fixtures, and Computers [Member]    
Property, plant, and equipment 6,414 7,119
Construction in Progress [Member]    
Property, plant, and equipment $ 1,522 $ 999