Restatement of Previously Issued Unaudited Condensed Consolidated Financial Statements (Unaudited) - Unaudited Condensed Consolidated Statements of Operations (Details) - USD ($)	3 Months Ended								4 Months Ended	8 Months Ended	12 Months Ended
	Sep. 28, 2024	Jun. 29, 2024	Mar. 30, 2024	Dec. 30, 2023	Sep. 30, 2023	Jun. 24, 2023	Mar. 25, 2023	Dec. 24, 2022	Sep. 24, 2022	Jun. 06, 2022	Sep. 28, 2024		Sep. 30, 2023		Sep. 24, 2022
Revenue:
Total revenue	$ 564,566,000	$ 470,338,000	$ 393,332,000	$ 359,943,000	$ 391,888,000	$ 311,837,000	$ 266,854,000	$ 206,312,000			$ 1,788,179,000		$ 1,176,891,000		$ 593,312,000
Cost of revenue:
Total cost of revenue	468,150,000	415,365,000	363,112,000	295,886,000	333,099,000	258,928,000	224,007,000	171,118,000			1,542,513,000		987,152,000		493,665,000
Gross profit	96,416,000	54,973,000	30,220,000	64,057,000	58,789,000	52,909,000	42,847,000	35,194,000			245,666,000		189,739,000		99,647,000
Operating loss	10,888,000	(37,620,000)	(64,894,000)	(25,099,000)	(53,935,000)	(42,009,000)	(57,717,000)	(69,569,000)			(116,725,000)		(223,230,000)		(140,375,000)
Loss before income tax and equity method investment	20,304,000	(26,005,000)	(55,082,000)	(18,900,000)	(50,274,000)	(39,072,000)	(55,433,000)	(67,735,000)			(79,683,000)		(212,514,000)		(139,089,000)
Income tax benefit (expense)	(4,110,000)	(182,000)	252,000	(172,000)	4,859,000	(5,000)	17,000	(251,000)			(4,212,000)		4,620,000		0
Net loss	15,954,000	(26,724,000)	(54,830,000)	(19,072,000)	(45,415,000)	(39,077,000)	(55,416,000)	(67,986,000)	$ (66,955,000)	$ (72,134,000)	(84,672,000)		(207,894,000)		(139,089,000)
Net loss attributable to noncontrolling interests	13,118,000	(22,043,000)	(46,021,000)	(16,236,000)	(39,207,000)	(34,730,000)	(49,298,000)	(60,793,000)			(71,182,000)		(184,028,000)		(60,092,000)
Net loss attributable to common stockholders	$ 2,836,000	$ (4,681,000)	$ (8,809,000)	$ (2,836,000)	$ (6,208,000)	$ (4,347,000)	$ (6,118,000)	$ (7,193,000)			$ (13,490,000)		$ (23,866,000)		$ (6,863,000)
Loss per share of Class A Common Stock:
Basic (in dollars per share)	$ 0.03	$ (0.05)	$ (0.09)	$ (0.03)	$ (0.08)	$ (0.07)	$ (0.10)	$ (0.12)			$ (0.14)	[1]	$ (0.37)	[1]	$ (0.13)	[1]
Diluted (in dollars per share)	$ 0.03	$ (0.05)	$ (0.09)	$ (0.03)	$ (0.08)	$ (0.07)	$ (0.10)	$ (0.12)			$ (0.14)	[1]	$ (0.37)	[1]	$ (0.13)	[1]
Systems
Revenue:
Total revenue	$ 536,447,000	$ 450,595,000	$ 370,693,000	$ 347,705,000	$ 380,205,000	$ 302,350,000	$ 257,603,000	$ 197,901,000			$ 1,705,440,000		$ 1,138,059,000		$ 567,993,000
Cost of revenue:
Total cost of revenue	$ 442,010,000	$ 398,761,000	$ 342,124,000	$ 283,946,000	$ 321,425,000	$ 244,660,000	$ 213,060,000	$ 160,931,000			$ 1,466,841,000		$ 940,076,000		$ 464,179,000

[1] Loss per share information has not been presented for periods prior to the Business Combination (as defined in Note 4, Mergers and Acquisitions), as it resulted in values that would not be meaningful to the users of these consolidated financial statements. Refer to Note 4, Mergers and Acquisitions for further information.