v3.26.1
Schedule of Revenue Recognized Under ASC 606 and ASC 842 (Details) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Product Information [Line Items]    
Revenues $ 3,737 $ 5,861
North and South America [Member]    
Product Information [Line Items]    
Revenues 1,220 3,855
EMEA [Member]    
Product Information [Line Items]    
Revenues 1,793 1,888
Asia and Australia [Member]    
Product Information [Line Items]    
Revenues 724 118
Region [Member]    
Product Information [Line Items]    
Revenues 3,737 5,861
WAM-V [Member]    
Product Information [Line Items]    
Revenues 1,390 4,554
Buoy [Member]    
Product Information [Line Items]    
Revenues 365 589
Service [Member]    
Product Information [Line Items]    
Revenues 1,982 718
Product [Member]    
Product Information [Line Items]    
Revenues 3,737 5,861
Accounting Standards Update 2014-09 [Member] | North and South America [Member]    
Product Information [Line Items]    
Revenues 994 3,855
Accounting Standards Update 2014-09 [Member] | EMEA [Member]    
Product Information [Line Items]    
Revenues 1,380 1,550
Accounting Standards Update 2014-09 [Member] | Asia and Australia [Member]    
Product Information [Line Items]    
Revenues 724 3
Accounting Standards Update 2014-09 [Member] | Region [Member]    
Product Information [Line Items]    
Revenues 3,098 5,408
Accounting Standards Update 2014-09 [Member] | WAM-V [Member]    
Product Information [Line Items]    
Revenues 913 4,216
Accounting Standards Update 2014-09 [Member] | Buoy [Member]    
Product Information [Line Items]    
Revenues 203 474
Accounting Standards Update 2014-09 [Member] | Service [Member]    
Product Information [Line Items]    
Revenues 1,982 718
Accounting Standards Update 2014-09 [Member] | Product [Member]    
Product Information [Line Items]    
Revenues 3,098 5,408
Accounting Standards Update 2016-02 [Member] | North and South America [Member]    
Product Information [Line Items]    
Revenues 226
Accounting Standards Update 2016-02 [Member] | EMEA [Member]    
Product Information [Line Items]    
Revenues 413 338
Accounting Standards Update 2016-02 [Member] | Asia and Australia [Member]    
Product Information [Line Items]    
Revenues 115
Accounting Standards Update 2016-02 [Member] | Region [Member]    
Product Information [Line Items]    
Revenues 639 453
Accounting Standards Update 2016-02 [Member] | WAM-V [Member]    
Product Information [Line Items]    
Revenues 477 338
Accounting Standards Update 2016-02 [Member] | Buoy [Member]    
Product Information [Line Items]    
Revenues 162 115
Accounting Standards Update 2016-02 [Member] | Service [Member]    
Product Information [Line Items]    
Revenues
Accounting Standards Update 2016-02 [Member] | Product [Member]    
Product Information [Line Items]    
Revenues $ 639 $ 453