Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2021	Sep. 25, 2020	Sep. 24, 2021	Sep. 25, 2020
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (21,540)	$ 1,403	$ (28,632)	$ (20,844)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(488)	285	(508)	(32)
Comprehensive (loss) income	(22,028)	1,688	(29,140)	(20,876)
Comprehensive loss attributable to noncontrolling interest	(11)	(14)	(45)	(54)
Comprehensive (loss) income attributable to Company	$ (22,017)	$ 1,702	$ (29,095)	$ (20,822)