SEGMENT DATA - (Reconciliation of Segment Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Mar. 31, 2024
Corporate and Other
Revenues	$ 19,584	$ 25,971	$ 58,851	$ 64,170
Operating Income (Loss)	(1,249)	(2,062)	(7,953)	(12,627)
Total assets	52,713		52,713		$ 63,169
Operating Segments
Corporate and Other
Revenues	19,584	25,971	58,851	64,170
Operating Income (Loss)	(1,249)	(2,062)	(7,953)	(12,627)
Total assets	52,713		52,713		63,169
Operating Segments | Lighting Segment
Corporate and Other
Revenues	13,214	18,545	36,805	44,739
Operating Income (Loss)	429	951	(2,058)	(1,777)
Total assets	20,896		20,896		25,911
Operating Segments | Maintenance Segment
Corporate and Other
Revenues	3,925	4,608	11,045	11,996
Operating Income (Loss)	309	(1,060)	(1,019)	(4,660)
Total assets	5,006		5,006		8,827
Operating Segments | Electric Vehicle Charging Systems
Corporate and Other
Revenues	2,445	2,818	11,001	7,435
Operating Income (Loss)	(1,166)	(1,454)	(2,001)	(4,417)
Total assets	13,192		13,192		15,291
Operating Segments | Corporate and Other
Corporate and Other
Revenues	0	0	0	0
Operating Income (Loss)	(821)	$ (499)	(2,875)	$ (1,773)
Total assets	$ 13,619		$ 13,619		$ 13,140