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Note 1 - Summary of Significant Accounting Policies - Summary of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Property, plant and equipment, gross $ 358,939 $ 355,298
Less accumulated depreciation (227,117) (220,426)
Property, plant and equipment, net 131,822 134,872
Land [Member]    
Property, plant and equipment, gross 6,116 6,214
Building [Member]    
Property, plant and equipment, gross 123,199 121,517
Machinery and Equipment [Member]    
Property, plant and equipment, gross $ 229,624 $ 227,567