CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (1,606)	$ (3,891)
Other comprehensive income (loss), before tax
Change in unrealized net loss on available-for-sale investments	29	169
Foreign currency translation losses	(96)	10
Other comprehensive income (loss), before tax	(67)	179
Income tax expense related to items in other comprehensive income (loss)	0	0
Other comprehensive income (loss), net of tax	(67)	179
Comprehensive loss	$ (1,673)	$ (3,712)