Organization and Significant Accounting Policies - Employee Savings Plan (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Apr. 30, 2026 |
Apr. 30, 2025 |
Apr. 30, 2024 |
|
| Organization and Significant Accounting Policies | |||
| Amount of expense in contribution to the plan | $ 29,137,000 | $ 9,679,000 | $ 8,554,000 |