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Note 11 - Property, Plant and Equipment - Property, Plant and Equipment Components (Details) - USD ($)
$ in Thousands
Jul. 05, 2020
Dec. 31, 2019
Gross property, plant and equipment $ 59,948 $ 64,049
Accumulated depreciation (50,065) (52,374)
Property plant and equipment net 9,883 11,675
Land and Land Improvements [Member]    
Gross property, plant and equipment 43 50
Building and Building Improvements [Member]    
Gross property, plant and equipment 7,283 8,108
Property, Plant and Equipment, Other Types [Member]    
Gross property, plant and equipment 52,297 55,520
Construction in Progress [Member]    
Gross property, plant and equipment $ 325 $ 371