COMMITMENTS AND CONTINGENCIES (Details) gal in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 31, 2018 gal / d	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($) a gal	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Easements [Abstract]
Minimum rentals payment per year		$ 23,000	$ 40,000
Summary of minimum annual payments related to easement agreements [Abstract]
2020		72,000	72,000
2021		51,000	51,000
2022		40,000	40,000
2023		38,000	38,000
2024		39,000	39,000
2025 through 2043		906,000	906,000
Total		1,146,000	1,146,000
Summary of minimum annual purchase commitments for all interconnection agreements [Abstract]
2020		3,892,000	3,892,000
2021		3,881,000	3,881,000
2022		57,000	57,000
2023		57,000	57,000
2024		9,000	9,000
Total		7,896,000	7,896,000
Expenses for purchased water			$ 4,200,000	$ 4,200,000	$ 4,400,000
Artesian Water [Member]
Interconnections [Abstract]
Multiplier to estimate minimum purchase requirements for the year | gal			3
Minimum reduced purchase requirements of water | gal			1,095
Other Commitments [Abstract]
Agreement period			3 years
Commitment amount			$ 1,300,000
Tank painting expense			447,000	658,000	695,000
Summary of other commitment [Abstract]
2020		3,000,000	3,000,000
2021		3,000,000	3,000,000
2022		3,000,000	3,000,000
Total		$ 9,000,000	$ 9,000,000
Artesian Water Pennsylvania [Member]
Easements [Abstract]
Easement agreement period			40 years
Easement payments			$ 40,000	38,000	37,000
Artesian Wastewater [Member]
Easements [Abstract]
Area of land use as per perpetual agreement (in acres) | a			460
Minimum rentals payment per year			$ 40,000
Adjustment Factor			2.00%
Termination Period			180 days
Rental payments			$ 44,000	$ 44,000	$ 44,000
Artesian Water Maryland [Member]
Interconnections [Abstract]
Minimum purchase requirements of water | gal / d	35,000