Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 09, 2021	Jun. 30, 2020
Entity Information [Line Items]
Entity Registrant Name	ARTESIAN RESOURCES CORPORATION
Entity Central Index Key	0000863110
Current Fiscal Year End Date	--12-31
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Document Transition Report	false
Entity File Number	000-18516
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	51-0002090
Entity Address, Address Line One	664 Churchmans Road
Entity Address, City or Town	Newark
Entity Address, State or Province	DE
Entity Address, Postal Zip Code	19702
City Area Code	302
Local Phone Number	453 – 6900
Title of 12(b) Security	Common Stock
Trading Symbol	ARTNA
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Class A Stock [Member]
Entity Information [Line Items]
Entity Public Float			$ 294,467,185
Entity Common Stock, Shares Outstanding		8,479,730
Class B Stock [Member]
Entity Information [Line Items]
Entity Public Float			$ 8,901,771
Entity Common Stock, Shares Outstanding		881,452