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Schedule of Revenue Recognizes From Operating Lease Arrangements (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 31, 2024 | Jan. 31, 2023 | Jan. 31, 2024 | Jan. 31, 2023
Product Information [Line Items] |  |  |  |
Revenue | $ 1,792 | $ 734 | $ 3,953 | $ 1,752
North And South America [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue | 1,792 | 715 | 3,953 | 1,501
Asia and Australia [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue |  | 19 |  | 251
Region [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue | 1,792 | 734 | 3,953 | 1,752
WAMV [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue | 1,472 | 446 | 2,521 | 881
Buoy [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue | 320 | 176 | 950 | 227
Service [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue |  | 112 | 482 | 644
Product [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue | 1,792 | 734 | 3,953 | 1,752
Accounting Standards Update 2014-09 [Member] | North And South America [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue | 1,405 | 540 | 3,057 | 1,311
Accounting Standards Update 2014-09 [Member] | Asia and Australia [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue |  | 19 |  | 251
Accounting Standards Update 2014-09 [Member] | Region [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue | 1,405 | 559 | 3,057 | 1,562
Accounting Standards Update 2014-09 [Member] | WAMV [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue | 1,085 | 271 | 1,625 | 691
Accounting Standards Update 2014-09 [Member] | Buoy [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue | 320 | 176 | 950 | 227
Accounting Standards Update 2014-09 [Member] | Service [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue |  | 112 | 482 | 644
Accounting Standards Update 2014-09 [Member] | Product [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue | 1,405 | 559 | 3,057 | 1,562
Accounting Standards Update 2016-02 [Member] | North And South America [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue | 387 | 175 | 896 | 190
Accounting Standards Update 2016-02 [Member] | Asia and Australia [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue |  |  |  |
Accounting Standards Update 2016-02 [Member] | Region [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue | 387 | 175 | 896 | 190
Accounting Standards Update 2016-02 [Member] | WAMV [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue | 387 | 175 | 896 | 190
Accounting Standards Update 2016-02 [Member] | Buoy [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue |  |  |  |
Accounting Standards Update 2016-02 [Member] | Service [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue |  |  |  |
Accounting Standards Update 2016-02 [Member] | Product [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Revenue | $ 387 | $ 175 | $ 896 | $ 190

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