Marketable Debt Securities - Available-for-Sale Marketable Securities (Detail) - USD ($) $ in Thousands	May 08, 2021	Aug. 29, 2020
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	$ 125,170	$ 144,886
Available-For-Sale Marketable Securities, Gross Unrealized Gains	1,294	2,360
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(13)	(7)
Available-For-Sale Marketable Securities, Fair Value	126,451	147,239
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	31,660	46,652
Available-For-Sale Marketable Securities, Gross Unrealized Gains	546	970
Available-For-Sale Marketable Securities, Gross Unrealized Losses		(4)
Available-For-Sale Marketable Securities, Fair Value	32,206	47,618
Government bonds
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	69,237	44,594
Available-For-Sale Marketable Securities, Gross Unrealized Gains	580	1,172
Available-For-Sale Marketable Securities, Fair Value	69,817	45,766
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	4,912	4,842
Available-For-Sale Marketable Securities, Gross Unrealized Gains	64	75
Available-For-Sale Marketable Securities, Fair Value	4,976	4,917
Asset-backed securities and other
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	19,361	48,798
Available-For-Sale Marketable Securities, Gross Unrealized Gains	104	143
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(13)	(3)
Available-For-Sale Marketable Securities, Fair Value	$ 19,452	$ 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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