Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net Income (loss)	$ 1,393	$ (2,780)	$ (617)	$ (4,431)
Foreign currency translation adjustments	(10)	(9)	28	(7)
Comprehensive income (loss)	$ 1,383	$ (2,789)	$ (589)	$ (4,438)