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Investments in Affiliates (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Oct. 29, 2022 | Oct. 30, 2021 | Oct. 29, 2022 | Oct. 30, 2021 | Apr. 30, 2022
Schedule of Investments [Line Items] |  |  |  |  |
Equity method investments | $ 18,040 |  | $ 18,040 |  | $ 16,916
Equity in loss of affiliate | 811 | $ 819 | 1,701 | $ 1,565 |
Accounts payable | 52 |  | 52 |  |
Debt conversion, converted instrument, amount |  |  | 2,824 |  |
Long-term Receivables, Less Current Maturities |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Purchase of convertible notes | 2,882 |  | $ 2,882 |  |
Product Design and Development |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Related party transaction, amounts of transaction | $ 672 | $ 898 |  |  |

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