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Schedule Of Preliminary Allocation of Fair Value Assumptions (Details) - USD ($) $ in Thousands | Nov. 15, 2021 | Apr. 30, 2022 | Apr. 30, 2021
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill |  | $ 8,537 |
Marine Advanced Robotics, Inc. [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Total Purchase Consideration | $ 11,902 |  |
Cash | 12 |  |
Inventory | 150 |  |
Property and equipment, net | 38 |  |
Trademarks | 2,755 |  |
Patents | 1,193 |  |
Goodwill | 8,537 |  |
Contract liabilities acquired | (203) |  |
Deferred income tax liability | (580) |  |
Net asset acquired | $ 11,902 |  |

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