Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2020	Mar. 29, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net Income	$ 1,144	$ 632
Foreign currency translation adjustment, net of taxes	(788)	(923)
Change in pension, net of taxes of $221 and $173 in the 2020 and 2019 first quarters, respectively	149	143
Other comprehensive loss	(639)	(780)
Comprehensive income (loss)	$ 505	$ (148)