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Note 8 - Property, Plant and Equipment - Property, Plant and Equipment Components (Details) - USD ($)
$ in Thousands
Sep. 29, 2024
Dec. 31, 2023
Gross property, plant and equipment $ 77,171 $ 84,001
Accumulated depreciation (63,257) (66,868)
Property, Plant and Equipment, Net 13,914 17,133
Land and Land Improvements [Member]    
Gross property, plant and equipment 43 43
Building and Building Improvements [Member]    
Gross property, plant and equipment 7,864 8,507
Property, Plant and Equipment, Other Types [Member]    
Gross property, plant and equipment 68,544 74,588
Construction in Progress [Member]    
Gross property, plant and equipment $ 720 $ 863