Schedule of Revenue Recognized Under ASC 606 and ASC 842 (Details) - USD ($) $ in Thousands	3 Months Ended
Jul. 31, 2025	Jul. 31, 2024
Product Information [Line Items]
Revenue	$ 1,182	$ 1,301
North and South America [Member]
Product Information [Line Items]
Revenue	134	1,230
EMEA [Member]
Product Information [Line Items]
Revenue	1,047	67
Asia and Australia [Member]
Product Information [Line Items]
Revenue	1
Region [Member]
Product Information [Line Items]
Revenue	1,182	1,301
WAM-V [Member]
Product Information [Line Items]
Revenue	1,105	889
Buoy [Member]
Product Information [Line Items]
Revenue	66
Service [Member]
Product Information [Line Items]
Revenue	11	412
Product [Member]
Product Information [Line Items]
Revenue	1,182	1,301
Accounting Standards Update 2014-09 [Member] \| North and South America [Member]
Product Information [Line Items]
Revenue	134	1,230
Accounting Standards Update 2014-09 [Member] \| EMEA [Member]
Product Information [Line Items]
Revenue	980	4
Accounting Standards Update 2014-09 [Member] \| Asia and Australia [Member]
Product Information [Line Items]
Revenue	1
Accounting Standards Update 2014-09 [Member] \| Region [Member]
Product Information [Line Items]
Revenue	1,115	1,234
Accounting Standards Update 2014-09 [Member] \| WAM-V [Member]
Product Information [Line Items]
Revenue	1,038	822
Accounting Standards Update 2014-09 [Member] \| Buoy [Member]
Product Information [Line Items]
Revenue	66
Accounting Standards Update 2014-09 [Member] \| Service [Member]
Product Information [Line Items]
Revenue	11	412
Accounting Standards Update 2014-09 [Member] \| Product [Member]
Product Information [Line Items]
Revenue	1,115	1,234
Accounting Standards Update 2016-02 [Member] \| North and South America [Member]
Product Information [Line Items]
Revenue
Accounting Standards Update 2016-02 [Member] \| EMEA [Member]
Product Information [Line Items]
Revenue	67	67
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	67	67
Accounting Standards Update 2016-02 [Member] \| WAM-V [Member]
Product Information [Line Items]
Revenue	67	67
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	$ 67	$ 67