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Note 8 - Property, Plant and Equipment - Property, Plant and Equipment Components (Details) - USD ($)
$ in Thousands
Apr. 02, 2023
Dec. 31, 2022
Gross property, plant and equipment $ 80,033 $ 76,172
Accumulated depreciation (63,261) (60,640)
Property, Plant and Equipment, Net 16,772 15,532
Land and Land Improvements [Member]    
Gross property, plant and equipment 43 43
Building and Building Improvements [Member]    
Gross property, plant and equipment 8,257 8,044
Property, Plant and Equipment, Other Types [Member]    
Gross property, plant and equipment 69,036 66,037
Construction in Progress [Member]    
Gross property, plant and equipment $ 2,697 $ 2,048