Fair Value Measurements - Schedule of Changes in Fair Value of Warrants (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 26, 2021	Sep. 27, 2020
Warrants and Rights Outstanding [Roll Forward]
Beginning balance	$ 50,467
Changes in fair value	17,533	$ 19,132
Ending balance	32,934
Public Warrants
Warrants and Rights Outstanding [Roll Forward]
Beginning balance	30,667
Changes in fair value	(13,200)
Ending balance	17,467
Private Placement
Warrants and Rights Outstanding [Roll Forward]
Beginning balance	19,800
Changes in fair value	(4,333)
Ending balance	$ 15,467