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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Income Taxes [Line Items]    
Deferred tax asset, Section 174 addback $ 3,269 $ 2,303
Deferred tax asset valuation allowance 933 926
Foreign tax credit carryforwards $ 638 638
Minimum    
Income Taxes [Line Items]    
Federal, state and local tax returns period (in years) 3 years  
Foreign subsidiaries tax returns period (in years) 3 years  
Maximum    
Income Taxes [Line Items]    
Federal, state and local tax returns period (in years) 4 years  
Foreign subsidiaries tax returns period (in years) 7 years  
India Income Tax Department    
Income Taxes [Line Items]    
Tax withholding expense $ 416 $ 371