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