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Income Taxes (Details Narrative) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 31, 2022 | Jan. 31, 2021 | Jan. 31, 2022 | Jan. 31, 2021 | Apr. 30, 2022 | Apr. 30, 2021
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |  |  |  |
Operating Income (Loss) | $ (5,552) | $ (3,163) | $ (15,768) | $ (9,569) | $ 5,000 | $ 12,000
Proceeds from Debt, Net of Issuance Costs |  |  |  |  |  | 1,000
US Employees [Member] |  |  |  |  |  |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  | $ 20,000

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