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Fair Value Measurements - Fair Value of Available-for-Sale Securities by Contractual Maturity (Details) - USD ($)
$ in Thousands
Jan. 27, 2024
Jul. 29, 2023
Debt Securities, Available-for-sale [Line Items]    
One Year or Less $ 2,321  
Over One Year Through Five Years 0  
Over Five Years 0  
Total 2,321 $ 18,161
U.S. Treasury securities    
Debt Securities, Available-for-sale [Line Items]    
One Year or Less 272  
Over One Year Through Five Years 0  
Over Five Years 0  
Total 272 7,226
Corporate bonds    
Debt Securities, Available-for-sale [Line Items]    
One Year or Less 2,049  
Over One Year Through Five Years 0  
Over Five Years 0  
Total $ 2,049 $ 10,935