Schedule of Revenue Recognized Under ASC 606 and ASC 842 (Details) - USD ($) $ in Thousands	12 Months Ended
Apr. 30, 2025	Apr. 30, 2024
Product Information [Line Items]
Revenue	$ 5,861	$ 5,525
North and South America [Member]
Product Information [Line Items]
Revenue	3,855	5,278
EMEA [Member]
Product Information [Line Items]
Revenue	1,888	247
Asia and Australia [Member]
Product Information [Line Items]
Revenue	118
Region [Member]
Product Information [Line Items]
Revenue	5,861	5,525
WAM-V [Member]
Product Information [Line Items]
Revenue	4,554	3,304
Buoy [Member]
Product Information [Line Items]
Revenue	589	1,739
Service [Member]
Product Information [Line Items]
Revenue	718	482
Product [Member]
Product Information [Line Items]
Revenue	5,861	5,525
Accounting Standards Update 2014-09 [Member] \| North and South America [Member]
Product Information [Line Items]
Revenue	3,855	4,101
Accounting Standards Update 2014-09 [Member] \| EMEA [Member]
Product Information [Line Items]
Revenue	1,550	32
Accounting Standards Update 2014-09 [Member] \| Asia and Australia [Member]
Product Information [Line Items]
Revenue	3
Accounting Standards Update 2014-09 [Member] \| Region [Member]
Product Information [Line Items]
Revenue	5,408	4,133
Accounting Standards Update 2014-09 [Member] \| WAM-V [Member]
Product Information [Line Items]
Revenue	4,216	1,912
Accounting Standards Update 2014-09 [Member] \| Buoy [Member]
Product Information [Line Items]
Revenue	474	1,739
Accounting Standards Update 2014-09 [Member] \| Service [Member]
Product Information [Line Items]
Revenue	718	482
Accounting Standards Update 2014-09 [Member] \| Product [Member]
Product Information [Line Items]
Revenue	5,408	4,133
Accounting Standards Update 2016-02 [Member] \| North and South America [Member]
Product Information [Line Items]
Revenue		1,177
Accounting Standards Update 2016-02 [Member] \| EMEA [Member]
Product Information [Line Items]
Revenue	338	215
Accounting Standards Update 2016-02 [Member] \| Asia and Australia [Member]
Product Information [Line Items]
Revenue	115
Accounting Standards Update 2016-02 [Member] \| Region [Member]
Product Information [Line Items]
Revenue	453	1,392
Accounting Standards Update 2016-02 [Member] \| WAM-V [Member]
Product Information [Line Items]
Revenue	338	1,392
Accounting Standards Update 2016-02 [Member] \| Buoy [Member]
Product Information [Line Items]
Revenue	115
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	$ 453	$ 1,392