REVENUE RECOGNITION - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenues	$ 53,028	$ 44,728
Regulated Operation
Disaggregation of Revenue [Line Items]
Total revenues	50,242	44,728
Regulated Operation | Water Services
Disaggregation of Revenue [Line Items]
Total revenues	24,860	20,885
Regulated Operation | Water Services | Residential
Disaggregation of Revenue [Line Items]
Total revenues	17,541	15,114
Regulated Operation | Water Services | Irrigation
Disaggregation of Revenue [Line Items]
Total revenues	3,483	2,899
Regulated Operation | Water Services | Commercial
Disaggregation of Revenue [Line Items]
Total revenues	1,540	1,165
Regulated Operation | Water Services | Construction
Disaggregation of Revenue [Line Items]
Total revenues	1,388	830
Regulated Operation | Water Services | Other water revenues
Disaggregation of Revenue [Line Items]
Total revenues	908	877
Regulated Operation | Wastewater and recycled water services
Disaggregation of Revenue [Line Items]
Total revenues	25,382	23,843
Regulated Operation | Wastewater and recycled water services | Residential
Disaggregation of Revenue [Line Items]
Total revenues	22,423	21,346
Regulated Operation | Wastewater and recycled water services | Commercial
Disaggregation of Revenue [Line Items]
Total revenues	1,243	888
Regulated Operation | Wastewater and recycled water services | Recycled water revenues
Disaggregation of Revenue [Line Items]
Total revenues	1,365	1,242
Regulated Operation | Wastewater and recycled water services | Other wastewater revenues
Disaggregation of Revenue [Line Items]
Total revenues	351	367
Unregulated Operation
Disaggregation of Revenue [Line Items]
Total revenues	2,786	0
Unregulated Operation | ICFA revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 2,786	$ 0