Financial Instruments - Cash, Cash Equivalents and Marketable Securities by Investment Category (Details) - USD ($) $ in Thousands	Jun. 28, 2025	Sep. 28, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	$ 172,644	$ 144,184
Amortized Cost	253,972	221,036
Unrealized Gain	2	122
Unrealized Loss	(20)	0
Estimated Fair Value	253,954	221,158
Cash and cash equivalents	201,273	169,732
Marketable securities	52,681	51,426
Level 1:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amortized Cost	28,629	25,548
Estimated Fair Value	28,629	25,548
Cash and cash equivalents	28,629	25,548
Level 1: \| Money market funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amortized Cost	28,629	25,548
Estimated Fair Value	28,629	25,548
Cash and Cash Equivalents	28,629	25,548
Level 2:
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amortized Cost	52,699	51,304
Estimated Fair Value	52,681	51,426
Cash and Cash Equivalents	0	0
Unrealized Gain	2	122
Unrealized Loss	(20)	0
Marketable securities	52,681	51,426
Level 2: \| U.S. Treasury securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amortized Cost	52,699	51,304
Estimated Fair Value	52,681	51,426
Cash and Cash Equivalents	0	0
Unrealized Gain	2	122
Unrealized Loss	(20)	0
Marketable securities	$ 52,681	$ 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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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, before tax, of unrealized loss 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 currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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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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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), classified as current.

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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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