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Schedule of Unrealized Loss on Available-for-Sale Investments (Detail) - USD ($) $ in Thousands | Sep. 28, 2024 | Dec. 30, 2023
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Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value | $ 0 | $ 3,506
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss | 0 | 42
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value | 78,431 | 103,453
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss | 3,550 | 6,621
Available-for-sale investments with unrealized losses, Fair Value, Total | 78,431 | 106,959
Available-for-sale investments with unrealized losses, Unrealized Loss, Total | 3,550 | 6,663
Asset-backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value | 0 | 0
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss | 0 | 0
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value | 13,107 | 14,307
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss | 1,563 | 2,236
Available-for-sale investments with unrealized losses, Fair Value, Total | 13,107 | 14,307
Available-for-sale investments with unrealized losses, Unrealized Loss, Total | 1,563 | 2,236
Corporate bonds, commercial paper and direct obligations of government agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value | 0 | 3,506
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss | 0 | 42
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value | 65,324 | 86,841
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss | 1,987 | 4,342
Available-for-sale investments with unrealized losses, Fair Value, Total | 65,324 | 90,347
Available-for-sale investments with unrealized losses, Unrealized Loss, Total | $ 1,987 | 4,384
U.S. Treasury obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale investments with unrealized losses, Less than 12 months, Fair Value |  | 0
Available-for-sale investments with unrealized losses, Less than 12 months, Unrealized Loss |  | 0
Available-for-sale investments with unrealized losses, 12 months or longer, Fair Value |  | 2,305
Available-for-sale investments with unrealized losses, 12 months or longer, Unrealized Loss |  | 43
Available-for-sale investments with unrealized losses, Fair Value, Total |  | 2,305
Available-for-sale investments with unrealized losses, Unrealized Loss, Total |  | $ 43

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