REVENUE - Product Revenue (Parenthetical) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 79,720	$ 90,581	$ 77,383
Light fixture sales-type lease | Orion Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues	700	0	2,800
Sale of tax credits | Orion Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues	0	100	100
Legacy solar facilities | Orion Reportable Segments
Disaggregation of Revenue [Line Items]
Revenues	$ 100	$ 100	$ 100