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Income Taxes - Income Taxes Paid (Details) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2026 | Apr. 30, 2025 | Apr. 30, 2024
Income Tax Examination [Line Items] |  |  |
Federal | $ 0 |  |
State | 209 |  |
Foreign | 629 |  |
Income Taxes Paid, Net, Total | 838 | $ 920 | $ 975
Texas |  |  |
Income Tax Examination [Line Items] |  |  |
State | 197 |  |
Other |  |  |
Income Tax Examination [Line Items] |  |  |
State | 12 |  |
France |  |  |
Income Tax Examination [Line Items] |  |  |
Foreign | 104 |  |
Mexico |  |  |
Income Tax Examination [Line Items] |  |  |
Foreign | 434 |  |
Netherlands |  |  |
Income Tax Examination [Line Items] |  |  |
Foreign | 90 |  |
Other Foreign |  |  |
Income Tax Examination [Line Items] |  |  |
Foreign | $ 1 |  |

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