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Note 7 - Property, Plant and Equipment, Net - Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Property, plant and equipment, gross $ 145,776 $ 148,062
Accumulated depreciation (110,549) (109,852)
Property, plant and equipment, net 35,227 38,210
Land [Member]    
Property, plant and equipment, gross 1,082 1,105
Building and Building Improvements [Member]    
Property, plant and equipment, gross 21,058 20,915
Machinery and Equipment [Member]    
Property, plant and equipment, gross 120,501 120,961
Construction in Progress [Member]    
Property, plant and equipment, gross $ 3,135 $ 5,081