Unaudited Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2024	Jun. 24, 2023	Jun. 29, 2024	Jun. 24, 2023
Statement of Comprehensive Income [Abstract]
Net loss	$ (26,724)	$ (39,077)	$ (100,626)	$ (162,479)
Less: Net loss attributable to noncontrolling interests	(22,043)	(34,730)	(84,300)	(144,821)
Net loss attributable to common stockholders	(4,681)	(4,347)	(16,326)	(17,658)
Other comprehensive income (loss):
Foreign currency translation adjustments	(161)	651	(302)	169
Changes in unrealized gain on investments, net of income taxes of $— for the three and nine months ended June 29, 2024 and June 24, 2023	(1,318)	1,617	(5,481)	3,969
Total other comprehensive income (loss)	(1,479)	2,268	(5,783)	4,138
Less: other comprehensive income (loss) attributable to noncontrolling interests	(1,220)	2,016	(4,838)	3,678
Other comprehensive income (loss) attributable to common stockholders	(259)	252	(945)	460
Comprehensive loss	(28,203)	(36,809)	(106,409)	(158,341)
Less: Comprehensive loss attributable to noncontrolling interests	(23,263)	(32,714)	(89,138)	(141,143)
Total comprehensive loss attributable to common stockholders	$ (4,940)	$ (4,095)	$ (17,271)	$ (17,198)