CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (2,173)	$ (1,576)	$ (7,042)	$ (10,345)
Other comprehensive income (loss), before tax
Change in unrealized net loss on available-for-sale investments	157	101	213	323
Foreign currency translation gains (losses)	339	(15)	228	(234)
Other comprehensive income (loss), before tax	496	86	441	89
Income tax (expense) benefit related to items in other comprehensive loss	0	0	0	0
Other comprehensive income (loss), net of tax	496	86	441	89
Comprehensive loss	$ (1,677)	$ (1,490)	$ (6,601)	$ (10,256)