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Debt - Additional Information (Details) - Revolving Line of Credit - USD ($)
12 Months Ended
Aug. 24, 2020
Apr. 30, 2021
Debt Instrument [Line Items]    
Revolving line of credit, borrowing capacity $ 50,000,000.0  
Revolving line of credit maturing term 5 years  
Additional increase in credit commitment $ 15,000,000.0  
Interest rate, description   The revolving line bears interest at a fluctuating rate equal to the Base Rate or LIBOR, as applicable, plus the applicable margin.
Revolving line of credit   $ 0
Debt issuance costs included as part of other assets   $ 410,000
Minimum    
Debt Instrument [Line Items]    
Debt instrument, spread on variable rate 0.75%  
Maximum    
Debt Instrument [Line Items]    
Debt instrument, spread on variable rate 2.25%  
LIBOR    
Debt Instrument [Line Items]    
Borrowings interest rate   1.93%