Stock-Based Compensation and Warrant Units - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2024	Jun. 24, 2023	Jun. 29, 2024	Jun. 24, 2023
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 29,332	$ 36,999	$ 86,858	$ 121,762
Cost of revenue | Systems
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	3,401	10	9,955	26
Cost of revenue | Software maintenance and support
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	116	1,302	351	1,397
Cost of revenue | Operation services
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	290	2,820	1,502	3,462
Research and development
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	12,819	16,220	37,905	54,805
Selling, general, and administrative
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	12,706	16,647	37,145	62,072
RSUs (service-based and performance-based)
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	28,416	36,666	84,970	120,834
Employee stock purchase plan
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 916	$ 333	$ 1,888	$ 928