| Document and Entity Information | Nov. 23, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 23, 2020 |
| Current Fiscal Year End Date | --12-31 |
| Entity Registrant Name | ARTESIAN RESOURCES CORP |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-18516 |
| Entity Tax Identification Number | 51-0002090 |
| Entity Address, Address Line One | 664 CHURCHMANS RD |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000863110 |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | ARTNA |
| Security Exchange Name | NASDAQ |
