Sales, Prepaid Manufacturing Costs, Cost of Goods Sold, and Contract Liabilities - Schedule of Cost of Goods Sold (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Schedule of Cost of Goods Sold [Line Items]
Total	$ 1,963	$ 1,600	$ 3,497	$ 2,818
BESS CMA and MSA – cost of sales [Member]
Schedule of Cost of Goods Sold [Line Items]
Total	546	438	1,080	438
Specific services provided to marine scrubber systems [Member]
Schedule of Cost of Goods Sold [Line Items]
Total	738	669	1,092	1,519
Scrubber costs recognized / (accrual reduction) [Member]
Schedule of Cost of Goods Sold [Line Items]
Total	33		346	(90)
Amortization of intangibles [Member]
Schedule of Cost of Goods Sold [Line Items]
Total	42	237	83	489
FOWE cost of goods sold [Member]
Schedule of Cost of Goods Sold [Line Items]
Total	128		257
Salaries and Wages [Member]
Schedule of Cost of Goods Sold [Line Items]
Total	162	143	282	264
Design and engineering services for CSP [Member]
Schedule of Cost of Goods Sold [Line Items]
Total	296	110	328	169
Commission type costs [Member]
Schedule of Cost of Goods Sold [Line Items]
Total	$ 18	$ 3	$ 29	$ 29