Marketable Debt Securities - Available-for-Sale Marketable Securities (Detail) - USD ($) $ in Thousands	Feb. 12, 2022	Aug. 28, 2021
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	$ 121,892	$ 113,169
Available-For-Sale Marketable Securities, Gross Unrealized Gains	172	768
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(1,093)	(19)
Available-For-Sale Marketable Securities, Fair Value	120,971	113,918
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	19,325	23,650
Available-For-Sale Marketable Securities, Gross Unrealized Gains	79	329
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(87)	(2)
Available-For-Sale Marketable Securities, Fair Value	19,317	23,977
Government bonds
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	77,914	65,416
Available-For-Sale Marketable Securities, Gross Unrealized Gains	57	338
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(773)	(2)
Available-For-Sale Marketable Securities, Fair Value	77,198	65,752
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	5,656	6,552
Available-For-Sale Marketable Securities, Gross Unrealized Gains	25	58
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(113)	(8)
Available-For-Sale Marketable Securities, Fair Value	5,568	6,602
Asset-backed securities and other
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	18,997	17,551
Available-For-Sale Marketable Securities, Gross Unrealized Gains	11	43
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(120)	(7)
Available-For-Sale Marketable Securities, Fair Value	$ 18,888	$ 17,587

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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