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Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2023 | Apr. 30, 2022 | Apr. 30, 2021
Accumulated other comprehensive income |  |  |
Total accumulated other comprehensive loss balance as of April 30, 2022 | $ (6,514) |  |
Unrealized gain, net of $0 of taxes | 53 | $ (43) | $ (60)
Change in foreign currency translation adjustments | 2,009 | (6,814) | 75
Total accumulated other comprehensive loss balance as of April 30, 2023 | (4,452) | (6,514) |
Available-for-sale securities |  |  |
Accumulated other comprehensive income |  |  |
Total accumulated other comprehensive loss balance as of April 30, 2022 | (53) |  |
Unrealized gain, net of $0 of taxes | 53 |  |
Total accumulated other comprehensive loss balance as of April 30, 2023 |  | (53) |
Foreign Currency Translation Adjustments |  |  |
Accumulated other comprehensive income |  |  |
Total accumulated other comprehensive loss balance as of April 30, 2022 | (6,461) |  |
Change in foreign currency translation adjustments | 2,009 |  |
Total accumulated other comprehensive loss balance as of April 30, 2023 | (4,452) | (6,461) |
Accumulated Other Comprehensive Income |  |  |
Accumulated other comprehensive income |  |  |
Total accumulated other comprehensive loss balance as of April 30, 2022 | (6,514) |  |
Unrealized gain, net of $0 of taxes | 53 | (43) | $ (60)
Change in foreign currency translation adjustments | 2,009 |  |
Total accumulated other comprehensive loss balance as of April 30, 2023 | $ (4,452) | $ (6,514) |

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