Marketable Debt Securities - Available-for-Sale Marketable Securities (Detail) - USD ($) $ in Thousands	Feb. 13, 2021	Aug. 29, 2020
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	$ 132,694	$ 144,886
Available-For-Sale Marketable Securities, Gross Unrealized Gains	1,718	2,360
Available-For-Sale Marketable Securities, Gross Unrealized Losses		(7)
Available-For-Sale Marketable Securities, Fair Value	134,412	147,239
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	35,515	46,652
Available-For-Sale Marketable Securities, Gross Unrealized Gains	701	970
Available-For-Sale Marketable Securities, Gross Unrealized Losses		(4)
Available-For-Sale Marketable Securities, Fair Value	36,216	47,618
Government bonds
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	73,237	44,594
Available-For-Sale Marketable Securities, Gross Unrealized Gains	798	1,172
Available-For-Sale Marketable Securities, Fair Value	74,035	45,766
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	5,702	4,842
Available-For-Sale Marketable Securities, Gross Unrealized Gains	90	75
Available-For-Sale Marketable Securities, Fair Value	5,792	4,917
Asset-backed securities and other
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	18,240	48,798
Available-For-Sale Marketable Securities, Gross Unrealized Gains	129	143
Available-For-Sale Marketable Securities, Gross Unrealized Losses		(3)
Available-For-Sale Marketable Securities, Fair Value	$ 18,369	$ 48,938

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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