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Debt - 1.625% Senior Convertible Notes (2026 Notes) (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 06, 2023 | Mar. 22, 2017 | Sep. 27, 2025 | Sep. 28, 2024 | Jul. 02, 2022 | Aug. 20, 2025 | Mar. 03, 2017
Debt details |  |  |  |  |  |  |
Payment of debt issuance costs |  |  | $ 7,800,000 | $ 0 |  |  |
1.625% Senior Convertible Notes |  |  |  |  |  |  |
Debt details |  |  |  |  |  |  |
Loss on convertible note settlement | $ 14,600,000 |  |  |  |  |  |
1.625% Senior Convertible Notes | Convertible Notes |  |  |  |  |  |  |
Debt details |  |  |  |  |  |  |
Aggregate principal amount of convertible debt | $ 250,000,000 |  |  |  |  |  |
Stated interest rate | 1.625% |  | 1.625% |  |  | 1.625% |
Proceeds from debt before debt issuance costs | $ 118,000,000 |  |  |  |  |  |
Proceeds from Convertible Debt | 113,800,000 |  |  |  |  |  |
Payment of debt issuance costs | 4,200,000 |  |  |  |  |  |
Loss on convertible note extinguishment | 2,200,000 |  |  |  |  |  |
Debt issuance costs, net | 2,000,000 |  |  |  |  |  |
Expected remaining term |  |  | 6 months |  |  |  |
1.625% Senior Convertible Notes | Convertible Notes | Exchange Transaction |  |  |  |  |  |  |
Debt details |  |  |  |  |  |  |
Debt issued | 132,000,000 |  |  |  |  |  |
Repayments of debt | 127,500,000 |  |  |  |  |  |
Convertible note modification (Note 11) | $ 10,100,000 |  |  |  |  |  |
1.00% Senior Convertible Notes | Convertible Notes |  |  |  |  |  |  |
Debt details |  |  |  |  |  |  |
Aggregate principal amount of convertible debt |  | $ 60,000,000 |  |  |  |  | $ 400,000,000
Stated interest rate | 1.00% |  |  |  |  |  | 1.00%
Debt issued |  |  |  |  | $ 236,100,000 |  |
Payment of debt issuance costs |  | $ 8,900,000 |  |  |  |  |
Issuance costs | $ 300,000 |  |  |  |  |  |

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