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Stock Options and Share-Based Compensation - Summary of Stock Option Activity and Weighted Average Exercise Price (Detail)
 12 Months Ended
Apr. 30, 2025
$ / shares
shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]  
Outstanding at beginning of year (in shares) | shares 24,700
Canceled (in shares) | shares 0
Exercised (in shares) | shares (24,700)
Outstanding at end of year (in shares) | shares 0
Exercisable at end of year (in shares) | shares 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]  
Outstanding at beginning of year (in dollar per shares) | $ / shares $ 20.05
Canceled (in dollar per shares) | $ / shares 0
Exercised (in dollar per shares) | $ / shares 20.05
Outstanding at end of year (in dollar per shares) | $ / shares 0
Exercisable at end of year (in dollar per shares) | $ / shares $ 0