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Note 17 - Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
Sep. 29, 2019
Dec. 31, 2018
Foreign currency translation adjustments $ (10,993) $ (10,967)
Accumulated other comprehensive loss (24,868) (24,842)
UNITED STATES    
Employee benefit related adjustments, net of tax (14,177) (14,177)
Foreign Plan [Member]    
Employee benefit related adjustments, net of tax $ 302 $ 302