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Fair Value Measurements (Tables) | 9 Months Ended
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May 02, 2020
Fair Value Disclosures [Abstract] |
Schedule of Amortized Cost, Gross Unrealized Gains (Losses) and Fair Value of Available-for-sale Investments | The following table sets forth the amortized cost, gross unrealized gains, gross unrealized losses and fair values of our short-term and long-term investments accounted for as available-for-sale securities as of May 2, 2020, and August 3, 2019:
|  | May 2, 2020 |  |  |  |  |  |  |  | August 3, 2019 |  |  |  |  |  |
(in thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Financial Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 69,644 |  |  | $ | 713 |  |  | $ | (5) |  |  | $ | 70,352 |  |  | $ | 49,807 |  |  | $ | 100 |  |  | $ | — |  |  | $ | 49,907 |
Commercial paper |  | 31,154 |  |  | — |  |  | — |  |  | 31,154 |  |  | 29,761 |  |  | — |  |  | — |  |  | 29,761 |
Asset-backed securities |  | 46,513 |  |  | 397 |  |  | — |  |  | 46,910 |  |  | 42,587 |  |  | 145 |  |  | — |  |  | 42,732 |
Corporate bonds |  | 82,633 |  |  | 618 |  |  | (4) |  |  | 83,247 |  |  | 73,969 |  |  | 279 |  |  | — |  |  | 74,248 |
Total |  | $ | 229,944 |  |  | $ | 1,728 |  |  | $ | (9) |  |  | $ | 231,663 |  |  | $ | 196,124 |  |  | $ | 524 |  |  | $ | — |  |  | $ | 196,648 |
Schedule of Fair Value of Available-for-sale Securities By Contractual Maturity | The following table sets forth the fair value of available-for-sale securities by contractual maturity as of May 2, 2020, and August 3, 2019:
|  | May 2, 2020 |  |  |  |  |  |  |  | August 3, 2019 |  |  |  |  |  |
(in thousands) |  | One Year or Less |  | Over One Year Through Five Years |  | Over Five Years |  | Total |  | One Year or Less |  | Over One Year Through Five Years |  | Over Five Years |  | Total
Financial Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 45,495 |  |  | $ | 24,857 |  |  | $ | — |  |  | $ | 70,352 |  |  | $ | 44,772 |  |  | $ | 5,135 |  |  | $ | — |  |  | $ | 49,907 |
Commercial paper |  | 31,154 |  |  | — |  |  | — |  |  | 31,154 |  |  | 29,761 |  |  | — |  |  | — |  |  | 29,761 |
Asset-backed securities |  | 6,162 |  |  | 40,748 |  |  | — |  |  | 46,910 |  |  | 5,412 |  |  | 37,320 |  |  | — |  |  | 42,732 |
Corporate bonds |  | 61,933 |  |  | 21,314 |  |  | — |  |  | 83,247 |  |  | 63,331 |  |  | 10,917 |  |  | — |  |  | 74,248 |
Total |  | $ | 144,744 |  |  | $ | 86,919 |  |  | $ | — |  |  | $ | 231,663 |  |  | $ | 143,276 |  |  | $ | 53,372 |  |  | $ | — |  |  | $ | 196,648 |
Schedule of Short-term and Long-term Investments Accounted for as Available-for-sale Measured at Fair Value on Recurring Basis | The following table sets forth our cash equivalents, and short-term and long-term investments accounted for as available-for-sale securities that were measured at fair value on a recurring basis based on the fair value hierarchy as of May 2, 2020, and August 3, 2019:
|  | May 2, 2020 |  |  |  |  |  |  |  | August 3, 2019 |  |  |  |  |  |
(in thousands) |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Financial Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 2,565 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,565 |  |  | $ | 6,427 |  |  | $ | — |  |  | $ | — |  |  | $ | 6,427 |
U.S. Treasury securities |  | 5,508 |  |  | — |  |  | — |  |  | 5,508 |  |  | — |  |  | — |  |  | — |  |  | — |
Commercial paper |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 11,970 |  |  | — |  |  | 11,970 |
Investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | 70,352 |  |  | — |  |  | — |  |  | 70,352 |  |  | 49,907 |  |  | — |  |  | — |  |  | 49,907 |
Commercial paper |  | — |  |  | 31,154 |  |  | — |  |  | 31,154 |  |  | — |  |  | 29,761 |  |  | — |  |  | 29,761 |
Asset-backed securities |  | — |  |  | 46,910 |  |  | — |  |  | 46,910 |  |  | — |  |  | 42,732 |  |  | — |  |  | 42,732 |
Corporate bonds |  | — |  |  | 83,247 |  |  | — |  |  | 83,247 |  |  | — |  |  | 74,248 |  |  | — |  |  | 74,248 |
Total |  | $ | 78,425 |  |  | $ | 161,311 |  |  | $ | — |  |  | $ | 239,736 |  |  | $ | 56,334 |  |  | $ | 158,711 |  |  | $ | — |  |  | $ | 215,045 |

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- Definition Tabular disclosure 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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