GENERAL (Details)	6 Months Ended
	Jun. 30, 2019 gal / d Subsidiary Facility WaterSystem Plan Squarefeet
Business Operations [Abstract]
Number of wholly owned subsidiaries | Subsidiary	9
Number of subsidiaries not regulated | Subsidiary	4
Artesian Development purchased area of office space (in square feet) | Squarefeet	10,000
Artesian Development purchased area of warehouse space (in square feet) | Squarefeet	10,000
Artesian Wastewater [Member]
Business Operations [Abstract]
Number of wastewater treatment facilities owned and operated | Facility	4
Capacity of wastewater treatment facilities	500,000
Artesian Water Maryland [Member]
Business Operations [Abstract]
Number of public water systems owned and operated | WaterSystem	8
Maximum supply amount of water per day	1,000,000
Artesian Utility [Member]
Business Operations [Abstract]
Initial contract period of operating wastewater treatment facilities in Middletown	20 years
Number of wastewater treatment station facility operations in Middletown | Facility	2
Number of wastewater treatment facilities in Middletown providing reclaimed wastewater | Facility	1
Number of protection plans offered to customers | Plan	3
Artesian Utility [Member] | Wastewater Treatment Facility First of Two [Member] | Maximum [Member]
Business Operations [Abstract]
Capacity of wastewater treatment facilities	2,500,000
Artesian Utility [Member] | Wastewater Treatment Facility Second of Two [Member] | Maximum [Member]
Business Operations [Abstract]
Capacity of wastewater treatment facilities	250,000