Segment Reporting and Sales by Major Customer - Narrative (Details)	3 Months Ended
	Jul. 31, 2025 segment customer
Segment Reporting Information [Line Items]
Number of operating segments | segment	2
Customer Concentration Risk | Revenue Benchmark | The Five Aerospace Customers
Segment Reporting Information [Line Items]
Concentration risk, percentage	38.90%
Number of major customers	5
Customer Concentration Risk | Revenue Benchmark | Top Customer
Segment Reporting Information [Line Items]
Concentration risk, percentage	21.00%
Customer Concentration Risk | Revenue Benchmark | Next Top Four Customers | Minimum
Segment Reporting Information [Line Items]
Concentration risk, percentage	1.40%
Customer Concentration Risk | Revenue Benchmark | Next Top Four Customers | Maximum
Segment Reporting Information [Line Items]
Concentration risk, percentage	6.20%
Customer Concentration Risk | Accounts Receivable | Customer One
Segment Reporting Information [Line Items]
Concentration risk, percentage	25.30%
Number of major customers	1