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

Cash And Cash Equivalents, At Carrying Value And Debt Securities, Available-For-Sale, Excluding Accrued Interest

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Cash Equivalents, At Carrying Value And Debt Securities, Available-For-Sale, Amortized Cost, Excluding Accrued Interest, After Allowance For Credit Loss

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Debt Securities, Available-For-Sale, Amortized Cost, Excluding Accrued Interest, After Allowance For Credit Loss, Carrying Value

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Fair value portion of asset recognized for present right to economic benefit.

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amortized cost excluding accrued interest, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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