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Note 8 - Property, Plant and Equipment - Property, Plant and Equipment Components (Details) - USD ($)
$ in Thousands
Mar. 30, 2025
Dec. 31, 2024
Gross property, plant and equipment $ 76,143 $ 76,330
Accumulated depreciation (63,523) (63,031)
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization 12,620 13,299
Land and Land Improvements [Member]    
Gross property, plant and equipment 43 43
Building and Building Improvements [Member]    
Gross property, plant and equipment 7,776 7,781
Machinery, Equipment, Furniture and Fixtures [Member]    
Gross property, plant and equipment 67,687 67,636
Construction in Progress [Member]    
Gross property, plant and equipment $ 637 $ 870