Investments - Amortized Cost and Fair Value of Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Sep. 26, 2026	Dec. 27, 2025
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 151,971	$ 147,517
Gross Unrealized Gains	26	1,147
Gross Unrealized Losses	3,376	1,651
Fair Value	148,621	147,013
Money market investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,557	15,046
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	5,557	15,046
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	12,827	19,380
Gross Unrealized Gains	0	43
Gross Unrealized Losses	1,267	1,128
Fair Value	11,560	18,295
Corporate bonds, commercial paper and direct obligations of government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	113,059	103,425
Gross Unrealized Gains	26	1,097
Gross Unrealized Losses	2,073	523
Fair Value	111,012	103,999
U.S. Treasury obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	20,528	9,666
Gross Unrealized Gains	0	7
Gross Unrealized Losses	36	0
Fair Value	$ 20,492	$ 9,673

Amortized cost 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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- Definition

Amount 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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