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Fair Value Measurements (Tables)
 6 Months Ended
Jan. 27, 2024
Fair Value Disclosures [Abstract]  
Schedule of Short-term and Long-term Investments Accounted for as Available-for-sale Measured at Fair Value on Recurring Basis
Our cash equivalents and investments accounted for as available-for-sale securities that were measured at fair value on a recurring basis as of January 27, 2024 and July 29, 2023 were as follows:
 January 27, 2024July 29, 2023
(in thousands)Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
Cash equivalents:
Money market funds$127,499 $— $— $127,499 $80,251 $— $— $80,251 
Investments:
U.S. Treasury securities272 — — 272 7,226 — — 7,226 
Corporate bonds— 2,049 — 2,049 — 10,935 — 10,935 
Total$127,771 $2,049 $— $129,820 $87,477 $10,935 $— $98,412 
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 losses, and fair values of our investments accounted for as available-for-sale securities as of January 27, 2024 and July 29, 2023:
January 27, 2024July 29, 2023
(in thousands)Amortized CostGross Unrealized LossesFair ValueAmortized CostGross Unrealized LossesFair Value
Investments:
U.S. Treasury securities$272 $— $272 $7,266 $(40)$7,226 
Corporate bonds2,051 (2)2,049 11,069 (134)10,935 
Total$2,323 $(2)$2,321 $18,335 $(174)$18,161 
Schedule of Unrealized Loss on Investments
The fair value and gross unrealized losses for those investments that were in a continuous unrealized loss position as of January 27, 2024 were as follows:
Less Than 12 MonthsMore Than 12 MonthsTotal
(in thousands)Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
Investments:
Corporate bonds— — 2,049 (2)2,049 (2)
Total$— $— $2,049 $(2)$2,049 $(2)
The fair value and gross unrealized losses for those investments that were in a continuous unrealized loss position as of July 29, 2023 were as follows:
Less Than 12 MonthsMore Than 12 MonthsTotal
(in thousands)Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
Investments:
U.S. Treasury securities$265 $(1)$6,961 $(39)$7,226 $(40)
Corporate bonds— — 10,935 (134)10,935 (134)
Total$265 $(1)$17,896 $(173)$18,161 $(174)
Schedule of Fair Value of Available-for-sale Securities By Contractual Maturity
The fair values of available-for-sale securities by contractual maturity as of January 27, 2024 were as follows:
January 27, 2024
(in thousands)One Year or LessOver One Year Through Five YearsOver Five YearsTotal
Investments:
U.S. Treasury securities$272 $— $— $272 
Corporate bonds2,049 — — 2,049 
Total$2,321 $— $— $2,321