Amortized Cost and Fair Value of Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 154,033	$ 158,143
Gross Unrealized Gains	145	281
Gross Unrealized Losses	6,099	6,663
Fair Value	148,079	151,761
Money market investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	8,303	16,832
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	8,303	16,832
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	18,019	16,543
Gross Unrealized Gains	2	0
Gross Unrealized Losses	2,062	2,236
Fair Value	15,959	14,307
Corporate bonds and direct obligations of government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	123,879	118,481
Gross Unrealized Gains	143	279
Gross Unrealized Losses	4,012	4,384
Fair Value	120,010	114,376
U.S. Treasury obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,832	6,287
Gross Unrealized Gains	0	2
Gross Unrealized Losses	25	43
Fair Value	$ 3,807	$ 6,246