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Revenue Recognition - Summary of Net Sales Transferred to Customers at a Point in Time and Over Time (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jan. 31, 2025
Jan. 31, 2024
Jan. 31, 2025
Jan. 31, 2024
Disaggregation of Revenue [Line Items]        
Net sales transferred to customers $ 67,167 $ 46,778 $ 163,324 $ 147,053
Over Time        
Disaggregation of Revenue [Line Items]        
Net sales transferred to customers 48,273 45,211 142,010 142,554
Point in Time        
Disaggregation of Revenue [Line Items]        
Net sales transferred to customers 18,894 1,567 21,314 4,499
Domestic        
Disaggregation of Revenue [Line Items]        
Net sales transferred to customers 51,976 31,774 123,908 101,379
Domestic | Over Time        
Disaggregation of Revenue [Line Items]        
Net sales transferred to customers 33,082 30,207 102,594 96,880
Domestic | Point in Time        
Disaggregation of Revenue [Line Items]        
Net sales transferred to customers 18,894 1,567 21,314 4,499
International        
Disaggregation of Revenue [Line Items]        
Net sales transferred to customers 15,191 15,004 39,416 45,674
International | Over Time        
Disaggregation of Revenue [Line Items]        
Net sales transferred to customers 15,191 15,004 39,416 45,674
International | Point in Time        
Disaggregation of Revenue [Line Items]        
Net sales transferred to customers $ 0 $ 0 $ 0 $ 0