SEGMENTS (Reconciliation of Segment Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2023
Corporate and Other
Revenues	$ 20,586	$ 17,560	$ 38,199	$ 35,466
Operating Loss	(4,168)	(2,943)	(10,565)	(6,560)
Total assets	65,830		65,830		$ 71,579
Lighting Segment
Corporate and Other
Total assets	27,827		27,827		25,009
Maintenance Services
Corporate and Other
Total assets	8,051		8,051		10,372
Electric Vehicle Charging Systems
Corporate and Other
Total assets	16,626		16,626		11,501
Corporate and Other
Corporate and Other
Total assets	13,326		13,326		$ 24,697
Operating Segments | Lighting Segment
Corporate and Other
Revenues	13,573	14,115	26,194	27,967
Operating Loss	(1,962)	(2,296)	(2,728)	(3,300)
Operating Segments | Maintenance Services
Corporate and Other
Revenues	3,634	3,445	7,388	7,499
Operating Loss	(1,760)	(795)	(3,600)	(1,085)
Operating Segments | Electric Vehicle Charging Systems
Corporate and Other
Revenues	3,379	0	4,617	0
Operating Loss	(1,029)	0	(2,963)	0
Operating Segments | Corporate and Other
Corporate and Other
Revenues	0	0	0	0
Operating Loss	$ 583	$ 148	$ (1,274)	$ (2,175)