Revenue Recognition - Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Revenue, net:
Total revenue, net	$ 20,148	$ 14,600	$ 58,513	$ 66,871
Product and accessories
Revenue, net:
Total revenue, net	8,272	5,165	24,903	33,464
Microturbine Products
Revenue, net:
Total revenue, net	7,873	5,078	24,021	32,553
Accessories
Revenue, net:
Total revenue, net	399	87	882	911
Service
Revenue, net:
Total revenue, net	7,405	6,603	23,228	23,906
Rentals
Revenue, net:
Total revenue, net	4,471	2,832	10,382	9,501
Total North America
Revenue, net:
Total revenue, net	13,265	9,868	39,806	42,645
United States
Revenue, net:
Total revenue, net	12,447	8,032	37,233	36,879
Mexico
Revenue, net:
Total revenue, net	800	1,310	2,418	4,553
All other North America
Revenue, net:
Total revenue, net	18	526	155	1,213
Europe
Revenue, net:
Total revenue, net	3,271	2,578	8,222	13,898
Asia
Revenue, net:
Total revenue, net	1,027	1,019	1,923	2,786
Australia
Revenue, net:
Total revenue, net	367	850	2,284	4,179
All other
Revenue, net:
Total revenue, net	$ 2,218	$ 285	$ 6,278	$ 3,363