Fair Value Measurements - Schedule of Changes in Fair Value of Warrants (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020
Warrants and Rights Outstanding [Roll Forward]
Beginning balance	$ 50,467
Changes in fair value	1,133	$ 14,132
Ending balance	49,333
Public Warrants
Warrants and Rights Outstanding [Roll Forward]
Beginning balance	30,667
Changes in fair value	399
Ending balance	31,066
Private Placement
Warrants and Rights Outstanding [Roll Forward]
Beginning balance	19,800
Changes in fair value	(1,533)
Ending balance	$ 18,267