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Summary of Significant Accounting Policies - Schedule of Property Plant and Equipment (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Property, Plant and Equipment [Line Items]    
Property plant and equipment gross $ 74,375 $ 71,983
Less accumulated depreciation (52,008) (48,809)
Net property, plant and equipment 22,367 23,174
Depreciation 4,744 3,990
Land    
Property, Plant and Equipment [Line Items]    
Property plant and equipment gross 41 41
Building and improvements    
Property, Plant and Equipment [Line Items]    
Property plant and equipment gross $ 19,086 18,240
Building and improvements | Minimum    
Property, Plant and Equipment [Line Items]    
Useful Life (in years) 2 years  
Building and improvements | Maximum    
Property, Plant and Equipment [Line Items]    
Useful Life (in years) 40 years  
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Property plant and equipment gross $ 55,248 $ 53,702
Machinery and equipment | Minimum    
Property, Plant and Equipment [Line Items]    
Useful Life (in years) 2 years  
Machinery and equipment | Maximum    
Property, Plant and Equipment [Line Items]    
Useful Life (in years) 10 years