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Financial Instruments - Cash, Cash Equivalents and Marketable Securities by Investment Category (Details) - USD ($) $ in Thousands | Mar. 29, 2025 | Sep. 28, 2024
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash | $ 157,192 | $ 144,184
Unrealized Gain | 15 | 122
Unrealized Loss | (10) | 0
Total | 223,502 | 221,036
Total | 223,507 | 221,158
Cash and cash equivalents | 173,158 | 169,732
Marketable securities | 50,349 | 51,426
Level 1: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and Cash Equivalents | 13,775 | 25,548
Amortized Cost | 13,775 | 25,548
Estimated Fair Value | 13,775 | 25,548
Level 1: | Money market funds |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 13,775 | 25,548
Cash and Cash Equivalents | 13,775 | 25,548
Estimated Fair Value | 13,775 | 25,548
Level 2: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 52,535 | 51,304
Cash and Cash Equivalents | 2,191 | 0
Unrealized Gain | 15 | 122
Unrealized Loss | (10) | 0
Estimated Fair Value | 52,540 | 51,426
Marketable securities | 50,349 | 51,426
Level 2: | U.S. Treasury securities |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 52,535 | 51,304
Cash and Cash Equivalents | 2,191 | 0
Unrealized Gain | 15 | 122
Unrealized Loss | (10) | 0
Estimated Fair Value | 52,540 | 51,426
Marketable securities | $ 50,349 | $ 51,426

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