SEGMENTS - (Reconciliation of Segment Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2024
Corporate and Other
Revenues	$ 19,906	$ 17,613
Operating Loss	(3,432)	(6,397)
Total assets	59,755		$ 63,169
Operating Segments
Corporate and Other
Revenues	19,906	17,613
Operating Loss	(3,432)	(6,397)
Total assets	59,755		63,169
Operating Segments | Lighting Segment [Member]
Corporate and Other
Revenues	12,751	12,621
Operating Loss	(1,206)	(766)
Total assets	23,785		25,911
Operating Segments | Maintenance services
Corporate and Other
Revenues	3,324	3,754
Operating Loss	(976)	(1,840)
Total assets	5,856		8,827
Operating Segments | Electric Vehicle Charging Systems
Corporate and Other
Revenues	3,831	1,238
Operating Loss	(231)	(1,934)
Total assets	14,812		15,291
Operating Segments | Corporate and Other
Corporate and Other
Revenues	0	0
Operating Loss	(1,019)	$ (1,857)
Total assets	$ 15,302		$ 13,140