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Segment Information - Schedule of Research and development expenses (Details) - Operating Segments [Member] - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2025 | Apr. 30, 2024
NEW YORK |  |
Research and development expenses: |  |
Research and development expenses | $ 3,374 | $ 2,678
Research and development expenses | 6,076 | 3,380
CALIFORNIA |  |
Research and development expenses: |  |
Research and development expenses | $ 2,702 | $ 702

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