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Fair Value Measurements - Additional Information (Detail) - Fair Value Measurements, Recurring - USD ($)
$ in Thousands
May 09, 2020
Aug. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term marketable debt securities $ 34,381 $ 67,958
Long-term marketable debt securities 81,836 $ 70,968
Cash flow hedging instruments $ 16,842