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Income Taxes - Summary of Deferred Tax Assets Associated with Loss Carryforwards (Details) - USD ($) $ in Thousands | Apr. 30, 2022 | Apr. 24, 2021
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Income Tax Disclosure [Abstract] |  |
Federal net operating losses | $ 908 | $ 1,286
Various U.S. state net operating losses (excluding federal tax effect) | 2,297 |
Foreign capital losses | 147 |
Foreign net operating losses | $ 92 |

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