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Revenue (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Municipality	Dec. 31, 2019 USD ($)
Revenue [Abstract]
Revenue from contracts with customers	$ 53,296	$ 51,059
Rents from regulated property	556	519
Total operating revenue	$ 53,852	51,578
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	$ 33,987	32,118
Water Utility Service [Member] | Commercial and Industrial [Member]
Revenue [Abstract]
Revenue from contracts with customers	13,764	14,161
Water Utility Service [Member] | Fire Protection [Member]
Revenue [Abstract]
Revenue from contracts with customers	3,191	3,074
Wastewater Utility Service [Member] | Residential [Member]
Revenue [Abstract]
Revenue from contracts with customers	1,746	1,291
Wastewater Utility Service [Member] | Commercial and Industrial [Member]
Revenue [Abstract]
Revenue from contracts with customers	304	280
Billing and Revenue Collection Services [Member]
Revenue [Abstract]
Revenue from contracts with customers	$ 266	70
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	$ 15	52
Number of days for customer to make payment after being invoiced	30 days
Other Revenue [Member]
Revenue [Abstract]
Revenue from contracts with customers	$ 23	$ 13

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