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Property, Plant, and Equipment - Summary of Depreciation and Amortization Expense (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Apr. 30, 2024
Depreciation and Other Amortization Expenses [Line Items]      
Depreciation and amortization $ 31,311 $ 31,845 $ 32,558
Cost of sales      
Depreciation and Other Amortization Expenses [Line Items]      
Depreciation and amortization 17,751 18,904 20,607
Research and development      
Depreciation and Other Amortization Expenses [Line Items]      
Depreciation and amortization 1,667 1,164 533
Selling, marketing, and distribution      
Depreciation and Other Amortization Expenses [Line Items]      
Depreciation and amortization 2,416 2,115 3,635
General and administrative      
Depreciation and Other Amortization Expenses [Line Items]      
Depreciation and amortization 9,233 9,505 7,693
Interest expense      
Depreciation and Other Amortization Expenses [Line Items]      
Depreciation and amortization $ 244 $ 157 $ 90