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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
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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

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