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Financial Instruments - Fair Value of Derivatives Not Designated as Hedge Instruments (Detail) - Not Designated as Hedge Instrument - Foreign Exchange Forward Contracts - USD ($) $ in Thousands | Oct. 31, 2021 | Apr. 30, 2021
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Derivative assets: |  |
Fair Value of Derivative Assets | $ 1,374 | $ 822
Derivative liabilities: |  |
Fair Value of Derivative Liabilities | $ 810 | $ 834

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