SEGMENT DATA (Reconciliation of Segment Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Corporate and Other
Revenues	$ 79,720	$ 90,581	$ 77,383
Total cost of sales	59,484	69,670	59,872
Gross profit	20,236	20,911	17,511
Total operating expenses	30,832	31,735	33,496
Operating Income (Loss)	(10,596)	(10,824)	(15,985)
Other income (expense)	(1,163)	(806)	(378)
Loss before income tax	(11,759)	(11,630)	(16,363)
Product revenue
Corporate and Other
Revenues	54,368	63,307	57,210
Total cost of sales	37,319	44,466	42,979
Service revenue
Corporate and Other
Revenues	25,352	27,274	20,173
Total cost of sales	22,165	25,204	16,893
Operating Segments
Corporate and Other
Revenues	79,720	90,581	77,383
Total cost of sales		69,670
Gross profit	20,236	20,911	17,511
Total operating expenses	30,832	31,735	33,496
Operating Income (Loss)	(10,596)	(10,824)	(15,985)
Loss before income tax	(11,759)	(11,630)	(16,363)
Depreciation and Amortization	2,618	2,590	2,095
Capital Expenditures	99	837	586
Operating Segments | Lighting Segment
Corporate and Other
Revenues	47,704	61,102	56,553
Total cost of sales	34,996	44,290	42,852
Gross profit	12,708	16,812	13,701
Total operating expenses	15,471	18,159	18,851
Operating Income (Loss)	(2,763)	(1,347)	(5,150)
Depreciation and Amortization	868	747	1,094
Capital Expenditures	26	92	71
Operating Segments | Maintenance Segment
Corporate and Other
Revenues	15,190	17,147	14,555
Total cost of sales	12,422	16,399	12,175
Gross profit	2,768	748	2,380
Total operating expenses	3,956	6,271	4,601
Operating Income (Loss)	(1,188)	(5,523)	2,221
Depreciation and Amortization	386	453	317
Capital Expenditures	2	535	194
Operating Segments | EV Segment
Corporate and Other
Revenues	16,826	12,332	6,275
Total cost of sales	12,066	8,981	4,845
Gross profit	4,760	3,351	1,430
Total operating expenses	7,116	4,914	5,588
Operating Income (Loss)	(2,356)	(1,563)	(4,158)
Depreciation and Amortization	1,083	979	465
Capital Expenditures	2	56	5
Operating Segments | Corporate and Other (Member)
Corporate and Other
Total operating expenses	4,289	2,391	4,456
Operating Income (Loss)	(4,289)	(2,391)	(4,456)
Other income (expense)	(1,163)	(806)	(378)
Depreciation and Amortization	281	411	219
Capital Expenditures	69	154	316
Operating Segments | Product revenue
Corporate and Other
Revenues	54,368	63,307	57,210
Operating Segments | Product revenue | Lighting Segment
Corporate and Other
Revenues	40,045	50,319	49,465
Operating Segments | Product revenue | Maintenance Segment
Corporate and Other
Revenues	5,902	4,687	3,266
Operating Segments | Product revenue | EV Segment
Corporate and Other
Revenues	8,421	8,301	4,479
Operating Segments | Service revenue
Corporate and Other
Revenues	25,352	27,274	20,173
Operating Segments | Service revenue | Lighting Segment
Corporate and Other
Revenues	7,659	10,783	7,088
Operating Segments | Service revenue | Maintenance Segment
Corporate and Other
Revenues	9,288	12,460	11,289
Operating Segments | Service revenue | EV Segment
Corporate and Other
Revenues	$ 8,405	$ 4,031	$ 1,796