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Stockholder's Equity - Narrative (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Apr. 30, 2026 | Apr. 30, 2025 | Mar. 12, 2025 | Aug. 31, 2023
Equity [Abstract] |  |  |  |
Common stock, shares authorized (in shares) | 5,000,000 | 5,000,000 |  |
Common stock, par value (in USD per share) | $ 2.50 | $ 2.50 |  |
Common stock, shares outstanding (in shares) | 2,866,000 | 2,839,000 |  |
Number of Shares authorized to be repurchased (in shares) |  |  |  | 100,000
Treasury stock (in shares) | 0 | 33,206 |  |
Treasury stock, value |  | $ 1,594,000 |  |
Number of shares authorized to be repurchased | 100,603 |  |  |
Number of additional shares authorized to be repurchased |  |  | 100,000 |

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