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Marketable Securities - Investments Classified By Contractual Maturity Date (Detail) - USD ($) $ in Thousands | Mar. 28, 2020 | Dec. 31, 2019
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Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract] |  |
Due in one year or less | $ 3,810 | $ 1,642
Total | $ 3,810 | $ 1,642

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