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GEOGRAPHIC CONCENTRATION OF CUSTOMERS (Details) | 3 Months Ended
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Mar. 31, 2021 Customer County
Concentration Risks [Abstract] |
Number of counties in which water utility service provided | County | 3
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Large Industrial Customer [Member] |
Concentration Risks [Abstract] |
Number of customers | 1
Concentration risk, percentage | 25.00%
Artesian Water [Member] |
Concentration Risks [Abstract] |
Number of customers | 90,500
Artesian Water Maryland [Member] |
Concentration Risks [Abstract] |
Number of customers | 2,500
Artesian Water Pennsylvania [Member] |
Concentration Risks [Abstract] |
Number of customers | 40
Artesian Wastewater [Member] |
Concentration Risks [Abstract] |
Number of customers | 2,900

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