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Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Revenue (Details) $ in Thousands	3 Months Ended		9 Months Ended
Revenue (Details) $ in Thousands	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) Municipality	Sep. 30, 2024 USD ($)
Revenue [Abstract]
Revenue from contracts with customers	$ 20,246	$ 19,601	$ 57,671	$ 55,751
Rents from regulated property	115	114	345	342
Total operating revenue	20,361	19,715	$ 58,016	56,093
Utility Service [Member]
Revenue [Abstract]
Number of days for customer to make payment after being invoiced			20 days
Water Utility Service [Member] \| Residential [Member]
Revenue [Abstract]
Revenue from contracts with customers	11,343	10,887	$ 32,219	31,153
Water Utility Service [Member] \| Commercial and Industrial [Member]
Revenue [Abstract]
Revenue from contracts with customers	5,592	5,527	15,742	15,292
Water Utility Service [Member] \| Fire Protection [Member]
Revenue [Abstract]
Revenue from contracts with customers	1,240	1,156	3,644	3,360
Wastewater Utility Service [Member] \| Residential [Member]
Revenue [Abstract]
Revenue from contracts with customers	1,695	1,578	4,891	4,554
Wastewater Utility Service [Member] \| Commercial and Industrial [Member]
Revenue [Abstract]
Revenue from contracts with customers	334	301	1,028	969
Billing and Revenue Collection Services [Member]
Revenue [Abstract]
Revenue from contracts with customers	18	121	$ 61	373
Number of municipalities within the service territory provided service \| Municipality			2
Number of days for customer to make payment after being invoiced			30 days
Collection Services [Member]
Revenue [Abstract]
Revenue from contracts with customers	9	25	$ 42	28
Number of days for customer to make payment after being invoiced			30 days
Other Revenue [Member]
Revenue [Abstract]
Revenue from contracts with customers	$ 15	$ 6	$ 44	$ 22