Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Total revenue	$ 13,286	$ 12,457
Water service
Disaggregation of Revenue [Line Items]
Total revenue	6,606	5,980
Regulated Operation | Water service
Disaggregation of Revenue [Line Items]
Total revenue	6,606	5,980
Regulated Operation | Water service | Residential
Disaggregation of Revenue [Line Items]
Total revenue	4,844	4,388
Regulated Operation | Water service | Irrigation
Disaggregation of Revenue [Line Items]
Total revenue	743	620
Regulated Operation | Water service | Commercial
Disaggregation of Revenue [Line Items]
Total revenue	480	383
Regulated Operation | Water service | Multi-family
Disaggregation of Revenue [Line Items]
Total revenue	135	81
Regulated Operation | Water service | Construction
Disaggregation of Revenue [Line Items]
Total revenue	154	327
Regulated Operation | Water service | Other water revenue
Disaggregation of Revenue [Line Items]
Total revenue	250	181
Regulated Operation | Wastewater and recycled water service
Disaggregation of Revenue [Line Items]
Total revenue	6,680	6,477
Regulated Operation | Wastewater and recycled water service | Residential
Disaggregation of Revenue [Line Items]
Total revenue	6,057	5,868
Regulated Operation | Wastewater and recycled water service | Commercial
Disaggregation of Revenue [Line Items]
Total revenue	311	287
Regulated Operation | Wastewater and recycled water service | Multi-family
Disaggregation of Revenue [Line Items]
Total revenue	104	49
Regulated Operation | Wastewater and recycled water service | Recycled water revenue
Disaggregation of Revenue [Line Items]
Total revenue	120	193
Regulated Operation | Wastewater and recycled water service | Other wastewater revenue
Disaggregation of Revenue [Line Items]
Total revenue	$ 88	$ 80