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Note 8 - Property, Plant and Equipment, Net - Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Property, plant and equipment, gross $ 143,756 $ 145,224
Accumulated depreciation (105,310) (108,391)
Property, plant and equipment, net 38,446 36,833
Land [Member]    
Property, plant and equipment, gross 1,018 1,098
Building and Building Improvements [Member]    
Property, plant and equipment, gross 21,620 21,529
Machinery and Equipment [Member]    
Property, plant and equipment, gross 117,650 118,358
Construction in Progress [Member]    
Property, plant and equipment, gross $ 3,468 $ 4,239