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Marketable Debt Securities - Available-for-Sale Marketable Securities (Detail) - USD ($) $ in Thousands | Nov. 21, 2020 | Aug. 29, 2020
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Schedule of Available-for-sale Securities [Line Items] |  |
Available-For-Sale Marketable Securities, Amortized Cost Basis | $ 139,661 | $ 144,886
Available-For-Sale Marketable Securities, Gross Unrealized Gains | 1,983 | 2,360
Available-For-Sale Marketable Securities, Gross Unrealized Losses | (21) | (7)
Available-For-Sale Marketable Securities, Fair Value | 141,623 | 147,239
Corporate debt securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-For-Sale Marketable Securities, Amortized Cost Basis | 42,192 | 46,652
Available-For-Sale Marketable Securities, Gross Unrealized Gains | 816 | 970
Available-For-Sale Marketable Securities, Gross Unrealized Losses |  | (4)
Available-For-Sale Marketable Securities, Fair Value | 43,008 | 47,618
Government bonds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-For-Sale Marketable Securities, Amortized Cost Basis | 75,235 | 44,594
Available-For-Sale Marketable Securities, Gross Unrealized Gains | 968 | 1,172
Available-For-Sale Marketable Securities, Gross Unrealized Losses | (18) |
Available-For-Sale Marketable Securities, Fair Value | 76,185 | 45,766
Mortgage-backed securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-For-Sale Marketable Securities, Amortized Cost Basis | 6,590 | 4,842
Available-For-Sale Marketable Securities, Gross Unrealized Gains | 68 | 75
Available-For-Sale Marketable Securities, Gross Unrealized Losses | (1) |
Available-For-Sale Marketable Securities, Fair Value | 6,657 | 4,917
Asset-backed securities and other |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-For-Sale Marketable Securities, Amortized Cost Basis | 15,644 | 48,798
Available-For-Sale Marketable Securities, Gross Unrealized Gains | 131 | 143
Available-For-Sale Marketable Securities, Gross Unrealized Losses | (2) | (3)
Available-For-Sale Marketable Securities, Fair Value | $ 15,773 | $ 48,938

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- Definition 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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
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- Definition 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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454 + Details
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