Amortized Cost and Fair Value of Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Jun. 28, 2025	Dec. 28, 2024
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 149,784	$ 147,438
Gross Unrealized Gains	783	223
Gross Unrealized Losses	2,386	3,796
Fair Value	148,181	143,865
Money market investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,452	13,473
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	9,452	13,473
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	23,117	26,785
Gross Unrealized Gains	56	25
Gross Unrealized Losses	1,353	1,770
Fair Value	21,820	25,040
Corporate bonds, commercial paper and direct obligations of government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	104,467	107,180
Gross Unrealized Gains	727	198
Gross Unrealized Losses	1,031	2,026
Fair Value	104,163	$ 105,352
U.S. Treasury obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	12,748
Gross Unrealized Gains	0
Gross Unrealized Losses	2
Fair Value	$ 12,746

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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+ Details

- Definition

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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