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Revenue (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) Municipality | Sep. 30, 2019 USD ($)
Revenue [Abstract] |  |  |  |
Revenue from contracts with customers | $ 14,117 | $ 13,549 | $ 40,038 | $ 38,176
Rents from regulated property | 140 | 131 | 416 | 383
Total operating revenue | 14,257 | 13,680 | $ 40,454 | 38,559
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 | 8,902 | 8,460 | $ 25,643 | 24,060
Water Utility Service [Member] | Commercial and Industrial [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenue from contracts with customers | 3,774 | 3,864 | 10,331 | 10,630
Water Utility Service [Member] | Fire Protection [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenue from contracts with customers | 795 | 780 | 2,379 | 2,290
Wastewater Utility Service [Member] | Residential [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenue from contracts with customers | 446 | 334 | 1,281 | 878
Wastewater Utility Service [Member] | Commercial and Industrial [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenue from contracts with customers | 78 | 72 | 229 | 203
Billing and Revenue Collection Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenue from contracts with customers | 118 | 19 | $ 147 | 56
Number of municipalities within the service territory provided service | Municipality |  |  | 4 |
Number of days for customer to make payment after being invoiced |  |  | 30 days |
Collection Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenue from contracts with customers | 0 | 16 | $ 14 | 48
Number of days for customer to make payment after being invoiced |  |  | 30 days |
Other Revenue [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenue from contracts with customers | $ 4 | $ 4 | $ 14 | $ 11

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