REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Disaggregation Of Revenue [Line Items]
Total revenues from contracts with customers									$ 74,418	$ 122,936	$ 113,892
Revenue accounted for under other guidance									2,965	1,447	2,948
Total revenue	$ 21,629	$ 20,288	$ 17,560	$ 17,906	$ 22,058	$ 30,714	$ 36,510	$ 35,101	77,383	124,383	116,840
Product revenue
Disaggregation Of Revenue [Line Items]
Total revenues from contracts with customers									54,245	90,442	84,716
Revenue accounted for under other guidance									2,965	1,447	2,948
Total revenue									57,210	91,889	87,664
Service revenue
Disaggregation Of Revenue [Line Items]
Total revenues from contracts with customers									20,173	32,494	29,176
Revenue accounted for under other guidance									0	0	0
Total revenue									20,173	32,494	29,176
Lighting product and installation
Disaggregation Of Revenue [Line Items]
Total revenues from contracts with customers									53,588	117,069	113,740
Lighting product and installation | Product revenue
Disaggregation Of Revenue [Line Items]
Total revenues from contracts with customers									46,500	89,827	84,659
Lighting product and installation | Service revenue
Disaggregation Of Revenue [Line Items]
Total revenues from contracts with customers									7,088	27,242	29,081
Maintenance services
Disaggregation Of Revenue [Line Items]
Total revenues from contracts with customers									14,555	5,825	95
Maintenance services | Product revenue
Disaggregation Of Revenue [Line Items]
Total revenues from contracts with customers									3,266	573	0
Maintenance services | Service revenue
Disaggregation Of Revenue [Line Items]
Total revenues from contracts with customers									11,289	5,252	95
Electric Vehicles
Disaggregation Of Revenue [Line Items]
Total revenue									6,275	0	0
Electric Vehicles | Product revenue
Disaggregation Of Revenue [Line Items]
Total revenue									4,479	0	0
Electric Vehicles | Service revenue
Disaggregation Of Revenue [Line Items]
Total revenue									1,796	0	0
Solar energy related revenues
Disaggregation Of Revenue [Line Items]
Total revenues from contracts with customers									0	42	57
Solar energy related revenues | Product revenue
Disaggregation Of Revenue [Line Items]
Total revenues from contracts with customers									0	42	57
Solar energy related revenues | Service revenue
Disaggregation Of Revenue [Line Items]
Total revenues from contracts with customers									$ 0	$ 0	$ 0