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Retirement Benefits - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2026
Apr. 30, 2025
UNITED STATES    
Defined Benefit Plan Disclosure [Line Items]    
Employer matching contributions $ 1,634 $ 1,177
Foreign Plan    
Defined Benefit Plan Disclosure [Line Items]    
Employer matching contributions $ 232 $ 247