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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 27, 2025
Sep. 28, 2024
Sep. 30, 2023
Income Tax Disclosure [Abstract]      
U.S. federal income taxes at statutory rate $ (10,604) $ (5,702) $ 923
U.S. state and local income taxes, net of federal benefit and state credits (4,619) (2,496) (841)
Foreign income tax rate differential 991 1,544 734
Stock-based compensation 5,068 2,726 104
Federal research and development tax credits (5,081) (8,240) (7,591)
Unrecognized federal tax benefits 457 1,082 184
Change in tax rate (190) (188) 0
Global intangible low taxed income, net of foreign tax credits 715 944 1,234
Foreign -derived intangible income (FDII) deduction (1,000) (1,519) (6,863)
Subpart F income 697 733 1,374
162(m) executive compensation limitation 1,923 1,496 2,513
Deferred adjustments 0 504 0
Intercompany IP sale 0 (10,412) 0
Other 387 (121) (695)
Change in valuation allowance 21,903 30,644 23,592
Provision for income taxes $ 10,647 $ 10,995 $ 14,668