Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jul. 02, 2021	Jul. 01, 2022	Jul. 02, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,040	$ 1,833	$ 4,280	$ 3,341
Foreign currency translation adjustment	(3,238)	254	(4,567)	(1,991)
Change in pension, net of taxes of $45 and $1 in the 2022 and 2021 second quarters, respectively, and $78 and $39 in the first two quarters of 2022 and 2021, respectively	580	56	911	606
Other comprehensive income (loss)	(2,658)	310	(3,656)	(1,385)
Comprehensive income (loss)	$ (618)	$ 2,143	$ 624	$ 1,956