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Long-Term Debt - Term Loan Facility (Details)
$ in Thousands
12 Months Ended
Apr. 22, 2021
Mar. 06, 2020
USD ($)
Sep. 30, 2019
USD ($)
Apr. 30, 2022
USD ($)
loan
Apr. 30, 2021
USD ($)
Apr. 30, 2020
USD ($)
Debt Instrument [Line Items]            
Write-off of debt discount and deferred financing fees       $ 0 $ 4,606 $ 1,331
Term Loan Facility            
Debt Instrument [Line Items]            
Loan amortization installments       $ 1,300    
Loan amortization installments (as a percent)       0.25%    
Borrowing interest rate (as a percent)       3.26%    
Repayments of debt   $ 50,000 $ 50,000      
Write-off of debt discount and deferred financing fees           $ 1,300
Fourth Amendment            
Debt Instrument [Line Items]            
Write-off of debt discount and deferred financing fees         $ 4,600  
Fourth Amendment | LIBOR            
Debt Instrument [Line Items]            
Margin added to variable rate (as a percent) 2.50%          
Variable rate floor (as a percent) 0.00%          
Minimum | Term Loan Facility            
Debt Instrument [Line Items]            
Number of incremental loans | loan       1    
Maximum | Term Loan Facility            
Debt Instrument [Line Items]            
Fixed amount of incremental loan       $ 100,000