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DEBT, Lines of Credit (Details) |  |  | 12 Months Ended
--- | --- | --- | ---
Jul. 15, 2021 USD ($) | Apr. 28, 2020 USD ($) Agreement | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Artesian Water [Member] |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |
Weighted average interest rate paid on the lines of credit |  |  | 1.40% |
Citizens Bank [Member] | Artesian Resources [Member] |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |
Line of credit |  |  | $ 40,000,000 |
Available funds under this line of credit |  |  | $ 31,300,000 |
Expiration date of line of credit |  |  | May 22, 2022 |
Amount to be borrowed |  |  | $ 40,000,000 |
Citizens Bank [Member] | LIBOR [Member] | Artesian Resources [Member] |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |
Variable rate for credit facility |  |  | LIBOR |
Interest rate |  |  | 1.00% |
CoBank [Member] | Artesian Resources [Member] |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |
Line of credit |  |  | $ 20,000,000 |
Available funds under this line of credit |  |  | 2,000,000.0 |
Amount to be borrowed |  |  | $ 20,000,000 |
CoBank [Member] | Artesian Water [Member] |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |
Expiration date of line of credit |  |  | Jul. 30, 2022 |
Patronage refunds |  |  | $ 1,200,000 | $ 1,000,000.0
Additional cash patronage distribution |  |  | $ 226,000 | $ 107,000
Additional cash patronage distribution, refund rate |  |  | 0.165% | 0.10%
Annual patronage refund rate |  |  | 0.80% | 0.80%
CoBank [Member] | Artesian Water Maryland [Member] |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |
Line of credit |  |  | $ 10,000,000 |
Amount to be borrowed |  |  | $ 10,000,000 |
CoBank [Member] | LIBOR [Member] | Artesian Water [Member] |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |
Variable rate for credit facility |  |  | LIBOR |
Interest rate |  |  | 1.50% |
Delaware Drinking Water State Revolving Fund [Member] | Artesian Water [Member] |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |
Line of credit | $ 2,500,000 |  | $ 2,600,000 |
Number of financing agreements | Agreement |  | 3 |  |
Interest rate | 1.00% | 0.60% |  |
Fee rate | 0.010 | 0.006 |  |
Amount to be borrowed | $ 2,500,000 |  | $ 2,600,000 |
Initial draw for acquisition | 1,500,000 |  |  |
Debt forgiven | $ 1,500,000 |  |  |
Delaware Drinking Water State Revolving Fund [Member] | Financing Agreement One [Member] | Artesian Water [Member] |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |
Advance from financing agreements |  | $ 1,700,000 |  |
Delaware Drinking Water State Revolving Fund [Member] | Financing Agreement Two [Member] | Artesian Water [Member] |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |
Advance from financing agreements |  | 1,000,000.0 |  |
Delaware Drinking Water State Revolving Fund [Member] | Financing Agreement Three [Member] | Artesian Water [Member] |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |
Advance from financing agreements |  | $ 1,300,000 |  |

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