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Note 15 - Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
Apr. 05, 2020
Dec. 31, 2019
Foreign currency translation adjustments $ (12,529) $ (10,623)
Accumulated other comprehensive loss (25,957) (24,051)
UNITED STATES    
Employee benefit related adjustments, net of tax (13,544) (13,544)
Foreign Plan [Member]    
Employee benefit related adjustments, net of tax $ 116 $ 116