Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Total revenue	$ 17,767	$ 14,241	$ 31,053	$ 26,698
Water service
Disaggregation of Revenue [Line Items]
Total revenue	8,404	7,368	15,010	13,348
Regulated revenue
Disaggregation of Revenue [Line Items]
Total revenue	15,656	14,241	28,942	26,698
Regulated revenue \| Water service
Disaggregation of Revenue [Line Items]
Total revenue	8,404	7,368	15,010	13,348
Regulated revenue \| Water service \| Residential
Disaggregation of Revenue [Line Items]
Total revenue	5,446	4,990	10,291	9,377
Regulated revenue \| Water service \| Irrigation
Disaggregation of Revenue [Line Items]
Total revenue	1,463	1,173	2,206	1,793
Regulated revenue \| Water service \| Commercial
Disaggregation of Revenue [Line Items]
Total revenue	604	412	1,084	795
Regulated revenue \| Water service \| Multi-family
Disaggregation of Revenue [Line Items]
Total revenue	157	111	291	192
Regulated revenue \| Water service \| Construction
Disaggregation of Revenue [Line Items]
Total revenue	364	424	518	751
Regulated revenue \| Water service \| Other water revenue
Disaggregation of Revenue [Line Items]
Total revenue	370	258	620	440
Regulated revenue \| Wastewater and recycled water service
Disaggregation of Revenue [Line Items]
Total revenue	7,252	6,873	13,932	13,350
Regulated revenue \| Wastewater and recycled water service \| Residential
Disaggregation of Revenue [Line Items]
Total revenue	6,093	5,928	12,150	11,797
Regulated revenue \| Wastewater and recycled water service \| Commercial
Disaggregation of Revenue [Line Items]
Total revenue	313	293	624	580
Regulated revenue \| Wastewater and recycled water service \| Multi-family
Disaggregation of Revenue [Line Items]
Total revenue	122	58	226	107
Regulated revenue \| Wastewater and recycled water service \| Recycled water revenue
Disaggregation of Revenue [Line Items]
Total revenue	613	505	733	698
Regulated revenue \| Wastewater and recycled water service \| Other wastewater revenue
Disaggregation of Revenue [Line Items]
Total revenue	111	89	199	168
Unregulated revenue
Disaggregation of Revenue [Line Items]
Total revenue	$ 2,111	$ 0	$ 2,111	$ 0