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Note 4 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Property, plant and equipment, gross $ 358,455 $ 355,298
Less accumulated depreciation (223,594) (220,426)
Property, plant and equipment, net 134,861 134,872
Land [Member]    
Property, plant and equipment, gross 6,172 6,214
Building [Member]    
Property, plant and equipment, gross 121,809 121,517
Machinery and Equipment [Member]    
Property, plant and equipment, gross $ 230,474 $ 227,567