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Debt - Long-term debt (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Long-term debt    
Total debt $ 135,000 $ 190,000
Less current portion 7,500 10,000
Total long-term debt, less current portion 127,500 180,000
Less unamortized debt issuance costs - term loans 1,596 2,160
Total long-term debt, net of unamortized debt issuance costs - term loans 125,904 177,840
Unamortized debt issuance costs - revolving credit facility 795 1,076
Term loan    
Long-term debt    
Total debt $ 135,000 $ 190,000
Revolving credit facility    
Long-term debt    
Current period interest rate 7.10% 2.60%