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SUBSEQUENT EVENT (Details) - Subsequent Event [Member] - Artesian Water [Member] - CoBank [Member] - First Mortgage Bond [Member] $ in Millions	Oct. 08, 2019 USD ($)
Subsequent Event [Abstract]
Debt instrument principal amount	$ 30
Debt instrument term	30 years
Fixed rate of interest	4.42%
Frequency of payment	quarterly

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Face (par) amount of debt instrument at time of issuance.

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-Publisher FASB
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-SubTopic 30
-Section 45
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Contractual interest rate for funds borrowed, under the debt agreement.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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