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Restructuring Charges (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2024 | Apr. 30, 2023 | Apr. 30, 2022
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges, net | $ (198) | $ 1,525 | $ 183
Employee Severance and Separation |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges, net | $ (200) |  |

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