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Stock-Based Compensation - Narrative (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2018 | Sep. 27, 2025 | Sep. 28, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in shares) |  | 0 | 0
Unrecognized stock-based compensation expense |  | $ 0 | $ 0
Stock options to purchase common stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period |  | 48 months |
Exercisable period |  | 10 years |
Restricted stock units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized stock-based compensation expense |  | $ 78,100,000 | $ 115,400,000
Unrecognized stock-based compensation expense, period of recognition |  | 2 years 3 months 18 days | 2 years 4 months 24 days
Restricted stock units | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period |  | 1 year |
Restricted stock units | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period |  | 4 years |
Performance stock units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized stock-based compensation expense |  | $ 3,300,000 | $ 200,000
Unrecognized stock-based compensation expense, period of recognition |  | 1 year 3 months 18 days | 1 year 6 months
2018 Equity Incentive Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of outstanding stock maximum | 5.00% |  |
Shares reserved for future issuance (in shares) |  | 45,881,799 |

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