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Fair Value Measurements - Additional Information (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands | Nov. 21, 2020 | Aug. 29, 2020
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Short-term marketable debt securities | $ 41,279 | $ 76,118
Long-term marketable debt securities | $ 100,344 | $ 71,121

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