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Revenue (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) Municipality	Jun. 30, 2020 USD ($)
Revenue [Abstract]
Revenue from contracts with customers	$ 13,661	$ 13,182	$ 26,601	$ 25,921
Rents from regulated property	140	138	281	276
Total operating revenue	13,801	13,320	$ 26,882	26,197
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	8,543	8,664	$ 16,688	16,741
Water Utility Service [Member] | Commercial and Industrial [Member]
Revenue [Abstract]
Revenue from contracts with customers	3,629	3,216	6,939	6,557
Water Utility Service [Member] | Fire Protection [Member]
Revenue [Abstract]
Revenue from contracts with customers	795	783	1,601	1,584
Wastewater Utility Service [Member] | Residential [Member]
Revenue [Abstract]
Revenue from contracts with customers	474	425	945	835
Wastewater Utility Service [Member] | Commercial and Industrial [Member]
Revenue [Abstract]
Revenue from contracts with customers	79	75	158	151
Billing and Revenue Collection Services [Member]
Revenue [Abstract]
Revenue from contracts with customers	120	14	$ 239	29
Number of municipalities within the service territory provided service | Municipality			3
Number of days for customer to make payment after being invoiced			30 days
Collection Services [Member]
Revenue [Abstract]
Revenue from contracts with customers	11	0	$ 11	14
Number of days for customer to make payment after being invoiced			30 days
Other Revenue [Member]
Revenue [Abstract]
Revenue from contracts with customers	$ 10	$ 5	$ 20	$ 10

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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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