Net Loss per Share - Computation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 30, 2024	Mar. 25, 2023	Mar. 30, 2024	Mar. 25, 2023
Numerator - basic and diluted
Net loss	$ (40,952)	$ (55,416)	$ (53,919)	$ (123,402)
Less: Net loss attributable to the noncontrolling interest	(34,372)	(49,298)	(45,411)	(110,091)
Net loss attributable to common stockholders	$ (6,580)	$ (6,118)	$ (8,508)	$ (13,311)
Denominator - basic and diluted
Weighted-average shares of Class A common shares outstanding - basic (in shares)	93,043,769	60,503,119	88,155,791	59,352,634
Weighted-average shares of Class A common shares outstanding - diluted (in shares)	93,043,769	60,503,119	88,155,791	59,352,634
Loss per share of Class A common stock - basic (in dollars per share)	$ (0.07)	$ (0.10)	$ (0.10)	$ (0.22)
Loss per share of Class A common stock - diluted (in dollars per share)	$ (0.07)	$ (0.10)	$ (0.10)	$ (0.22)