Restatement of Previously Issued Financial Statements - Unaudited Condensed Consolidated Statements of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2024	Jun. 24, 2023	Jun. 29, 2024	Jun. 24, 2023
Revenue:
Total revenue	$ 470,338	$ 311,837	$ 1,223,613	$ 785,003
Cost of revenue:
Total cost of revenue	415,365	258,928	1,074,364	654,053
Gross profit	54,973	52,909	149,249	130,950
Operating loss	(37,620)	(42,009)	(127,613)	(169,295)
Loss before income tax and equity method investment	(26,005)	(39,072)	(99,987)	(162,240)
Income tax expense	(182)	(5)	(102)	(239)
Net loss	(26,724)	(39,077)	(100,626)	(162,479)
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)
Loss per share of Class A Common Stock:
Basic (in dollars per share)	$ (0.05)	$ (0.07)	$ (0.18)	$ (0.29)
Diluted (in dollars per share)	$ (0.05)	$ (0.07)	$ (0.18)	$ (0.29)
Systems
Revenue:
Total revenue	$ 450,595	$ 302,350	$ 1,168,993	$ 757,854
Cost of revenue:
Total cost of revenue	398,761	$ 244,660	1,024,832	$ 618,651
As Reported
Revenue:
Total revenue	491,862		1,284,613
Cost of revenue:
Total cost of revenue	424,456		1,102,939
Gross profit	67,406		181,674
Operating loss	(25,187)		(95,188)
Loss before income tax and equity method investment	(13,572)		(67,562)
Income tax expense	(95)		(24)
Net loss	(14,204)		(68,123)
Net loss attributable to noncontrolling interests	(11,716)		(57,127)
Net loss attributable to common stockholders	$ (2,488)		$ (10,996)
Loss per share of Class A Common Stock:
Basic (in dollars per share)	$ (0.02)		$ (0.12)
Diluted (in dollars per share)	$ (0.02)		$ (0.12)
As Reported | Systems
Revenue:
Total revenue	$ 472,119		$ 1,229,993
Cost of revenue:
Total cost of revenue	407,852		1,053,407
Adjustment
Revenue:
Total revenue	(21,524)		(61,000)
Cost of revenue:
Total cost of revenue	(9,091)		(28,575)
Gross profit	(12,433)		(32,425)
Operating loss	(12,433)		(32,425)
Loss before income tax and equity method investment	(12,433)		(32,425)
Income tax expense	(87)		(78)
Net loss	(12,520)		(32,503)
Net loss attributable to noncontrolling interests	(10,327)		(27,173)
Net loss attributable to common stockholders	$ (2,193)		$ (5,330)
Loss per share of Class A Common Stock:
Basic (in dollars per share)	$ (0.03)		$ (0.06)
Diluted (in dollars per share)	$ (0.03)		$ (0.06)
Adjustment | Systems
Revenue:
Total revenue	$ (21,524)		$ (61,000)
Cost of revenue:
Total cost of revenue	$ (9,091)		$ (28,575)