Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2023	Sep. 30, 2022	Sep. 29, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (871)	$ 1,102	$ (686)	$ 5,382
Foreign currency translation adjustment	(1,777)	(3,257)	(723)	(7,824)
Change in pension, net of taxes of $36 and $43 in the 2023 and 2022 third quarters, respectively, and $76 and $121 in the first three quarters of 2023 and 2022, respectively	175	557	279	1,468
Other comprehensive loss	(1,602)	(2,700)	(444)	(6,356)
Comprehensive loss	$ (2,473)	$ (1,598)	$ (1,130)	$ (974)