SEGMENTS (Reconciliation of Segment Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2023
Corporate and Other
Revenues	$ 25,971	$ 20,288	$ 64,170	$ 55,754
Operating income (loss)	(2,062)	(4,588)	(12,627)	(11,148)
Total assets	65,410		65,410		$ 71,579
Lighting Segment
Corporate and Other
Total assets	27,835		27,835		25,009
Maintenance Segment
Corporate and Other
Total assets	9,046		9,046		10,372
EV Segment
Corporate and Other
Total assets	15,024		15,024		11,501
Corporate and Other
Corporate and Other
Total assets	13,505		13,505		$ 24,697
Operating Segments | Lighting Segment
Corporate and Other
Revenues	18,545	14,151	44,739	42,118
Operating income (loss)	(951)	(632)	(1,777)	(3,932)
Operating Segments | Maintenance Segment
Corporate and Other
Revenues	4,608	3,307	11,996	10,806
Operating income (loss)	(1,060)	(722)	(4,660)	(1,807)
Operating Segments | EV Segment
Corporate and Other
Revenues	2,818	2,830	7,435	2,830
Operating income (loss)	1,454	1,669	(4,417)	(1,669)
Operating Segments | Corporate and Other
Corporate and Other
Revenues	0	0	0	0
Operating income (loss)	$ 499	$ 1,565	$ (1,773)	$ (3,740)