<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>421</ContextCount>
  <ElementCount>489</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>126</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>17</UnitCount>
  <MyReports>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>995100 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/dei/role/document/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>995300 - Document - Audit Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/dei/role/document/AuditInformation</Role>
      <ShortName>Audit Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>995301 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ConsolidatedBalanceSheet</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>995302 - Statement - CONSOLIDATED BALANCE SHEETS (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ConsolidatedBalanceSheet_Parentheticals</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>995303 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ConsolidatedIncomeStatement</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>995304 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ConsolidatedCashFlow</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>995305 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS??? EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ShareholdersEquityType2or3</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS??? EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>995306 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS??? EQUITY (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ShareholdersEquityType2or3_Parentheticals</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS??? EQUITY (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>995307 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995308 - Disclosure - REVENUE RECOGNITION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/REVENUERECOGNITION</Role>
      <ShortName>REVENUE RECOGNITION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995309 - Disclosure - LEASES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/LEASES</Role>
      <ShortName>LEASES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995310 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/FAIRVALUEOFFINANCIALINSTRUMENTS</Role>
      <ShortName>FAIR VALUE OF FINANCIAL INSTRUMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995311 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/INCOMETAXES</Role>
      <ShortName>INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995312 - Disclosure - PREFERRED STOCK</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/PREFERREDSTOCK</Role>
      <ShortName>PREFERRED STOCK</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995313 - Disclosure - COMMON STOCK AND ADDITIONAL PAID-IN CAPITAL</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/COMMONSTOCKANDADDITIONALPAIDINCAPITAL</Role>
      <ShortName>COMMON STOCK AND ADDITIONAL PAID-IN CAPITAL</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995314 - Disclosure - DEBT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/DEBT</Role>
      <ShortName>DEBT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>995315 - Disclosure - STOCK COMPENSATION PLANS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/STOCKCOMPENSATIONPLANS</Role>
      <ShortName>STOCK COMPENSATION PLANS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>995316 - Disclosure - EMPLOYEE BENEFIT PLANS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/EMPLOYEEBENEFITPLANS</Role>
      <ShortName>EMPLOYEE BENEFIT PLANS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>995317 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/COMMITMENTSANDCONTINGENCIES</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995318 - Disclosure - GEOGRAPHIC CONCENTRATION OF CUSTOMERS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/GEOGRAPHICCONCENTRATIONOFCUSTOMERS</Role>
      <ShortName>GEOGRAPHIC CONCENTRATION OF CUSTOMERS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>995319 - Disclosure - REGULATORY PROCEEDINGS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/REGULATORYPROCEEDINGS</Role>
      <ShortName>REGULATORY PROCEEDINGS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>995320 - Disclosure - NET INCOME PER COMMON SHARE AND EQUITY PER COMMON SHARE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/NETINCOMEPERCOMMONSHAREANDEQUITYPERCOMMONSHARE</Role>
      <ShortName>NET INCOME PER COMMON SHARE AND EQUITY PER COMMON SHARE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995321 - Disclosure - LEGAL PROCEEDINGS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/LEGALPROCEEDINGS</Role>
      <ShortName>LEGAL PROCEEDINGS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995322 - Disclosure - BUSINESS SEGMENT INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/BUSINESSSEGMENTINFORMATION</Role>
      <ShortName>BUSINESS SEGMENT INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995323 - Disclosure - IMPACT OF RECENT ACCOUNTING PRONOUNCEMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/IMPACTOFRECENTACCOUNTINGPRONOUNCEMENTS</Role>
      <ShortName>IMPACT OF RECENT ACCOUNTING PRONOUNCEMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995324 - Disclosure - SUBSEQUENT EVENT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/SUBSEQUENTEVENT</Role>
      <ShortName>SUBSEQUENT EVENT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>995410 - Disclosure - Pay vs Performance Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/PvpDisclosure</Role>
      <ShortName>Pay vs Performance Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure</Role>
      <ShortName>Cybersecurity Risk Management and Strategy Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>996000 - Disclosure - Accounting Policies, by Policy (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/AccountingPoliciesByPolicy</Role>
      <ShortName>Accounting Policies, by Policy (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>996001 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://artesianwater.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>996002 - Disclosure - REVENUE RECOGNITION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/REVENUERECOGNITIONTables</Role>
      <ShortName>REVENUE RECOGNITION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://artesianwater.com/role/REVENUERECOGNITION</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>996003 - Disclosure - LEASES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/LEASESTables</Role>
      <ShortName>LEASES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://artesianwater.com/role/LEASES</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>996004 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/FAIRVALUEOFFINANCIALINSTRUMENTSTables</Role>
      <ShortName>FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://artesianwater.com/role/FAIRVALUEOFFINANCIALINSTRUMENTS</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>996005 - Disclosure - INCOME TAXES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/INCOMETAXESTables</Role>
      <ShortName>INCOME TAXES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://artesianwater.com/role/INCOMETAXES</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>996006 - Disclosure - DEBT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/DEBTTables</Role>
      <ShortName>DEBT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://artesianwater.com/role/DEBT</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>996007 - Disclosure - STOCK COMPENSATION PLANS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/STOCKCOMPENSATIONPLANSTables</Role>
      <ShortName>STOCK COMPENSATION PLANS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://artesianwater.com/role/STOCKCOMPENSATIONPLANS</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>996008 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/COMMITMENTSANDCONTINGENCIESTables</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://artesianwater.com/role/COMMITMENTSANDCONTINGENCIES</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>996009 - Disclosure - REGULATORY PROCEEDINGS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/REGULATORYPROCEEDINGSTables</Role>
      <ShortName>REGULATORY PROCEEDINGS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://artesianwater.com/role/REGULATORYPROCEEDINGS</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>996010 - Disclosure - NET INCOME PER COMMON SHARE AND EQUITY PER COMMON SHARE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/NETINCOMEPERCOMMONSHAREANDEQUITYPERCOMMONSHARETables</Role>
      <ShortName>NET INCOME PER COMMON SHARE AND EQUITY PER COMMON SHARE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://artesianwater.com/role/NETINCOMEPERCOMMONSHAREANDEQUITYPERCOMMONSHARE</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>996011 - Disclosure - BUSINESS SEGMENT INFORMATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/BUSINESSSEGMENTINFORMATIONTables</Role>
      <ShortName>BUSINESS SEGMENT INFORMATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://artesianwater.com/role/BUSINESSSEGMENTINFORMATION</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>996012 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>996013 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of AFUDC (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ScheduleofAFUDCTable</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of AFUDC (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>996014 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Utility Plant (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ScheduleofUtilityPlantTable</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Utility Plant (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>996015 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Amortization Period of Other Regulatory Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/AmortizationPeriodofOtherRegulatoryExpenseTable</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Amortization Period of Other Regulatory Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>996016 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Regulatory Assets, Net of Amortization, Comprise (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/RegulatoryAssetsNetofAmortizationCompriseTable</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Regulatory Assets, Net of Amortization, Comprise (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>996017 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Other Deferred Assets, Net of Amortization (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/OtherDeferredAssetsNetofAmortizationTable</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Other Deferred Assets, Net of Amortization (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>996018 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Regulatory Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/RegulatoryLiabilitiesTable</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Regulatory Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>996019 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Changes in Accounts Receivable (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ChangesinAccountsReceivableTable</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Changes in Accounts Receivable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>996020 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Provision for Expected Credit Loss (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ProvisionforExpectedCreditLossTable</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Provision for Expected Credit Loss (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>996021 - Disclosure - REVENUE RECOGNITION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/REVENUERECOGNITIONDetails</Role>
      <ShortName>REVENUE RECOGNITION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/REVENUERECOGNITIONTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>996022 - Disclosure - REVENUE RECOGNITION - Disaggregated Revenues (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/DisaggregatedRevenuesTable</Role>
      <ShortName>REVENUE RECOGNITION - Disaggregated Revenues (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>996023 - Disclosure - REVENUE RECOGNITION - Contract Assets and Contract Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ContractAssetsandContractLiabilitiesTable</Role>
      <ShortName>REVENUE RECOGNITION - Contract Assets and Contract Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>996024 - Disclosure - LEASES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/LEASESDetails</Role>
      <ShortName>LEASES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/LEASESTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>996025 - Disclosure - LEASES - Rent Expense for All Operating Leases Except Those with Terms of 12 Months or Less (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/RentExpenseforAllOperatingLeasesExceptThosewithTermsof12MonthsorLessTable</Role>
      <ShortName>LEASES - Rent Expense for All Operating Leases Except Those with Terms of 12 Months or Less (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>996026 - Disclosure - LEASES - Supplemental Cash Flow Information Related to Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/SupplementalCashFlowInformationRelatedtoLeasesTable</Role>
      <ShortName>LEASES - Supplemental Cash Flow Information Related to Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>996027 - Disclosure - LEASES - Supplemental Balance Sheet Information Related to Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/SupplementalBalanceSheetInformationRelatedtoLeasesTable</Role>
      <ShortName>LEASES - Supplemental Balance Sheet Information Related to Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>996028 - Disclosure - LEASES - Maturities of Operating Lease Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/MaturitiesofOperatingLeaseLiabilitiesTable</Role>
      <ShortName>LEASES - Maturities of Operating Lease Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>996029 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/FAIRVALUEOFFINANCIALINSTRUMENTSDetails</Role>
      <ShortName>FAIR VALUE OF FINANCIAL INSTRUMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/FAIRVALUEOFFINANCIALINSTRUMENTSTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>996030 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - Carrying Amount and Fair Value of Long-Term Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/CarryingAmountandFairValueofLongTermDebtTable</Role>
      <ShortName>FAIR VALUE OF FINANCIAL INSTRUMENTS - Carrying Amount and Fair Value of Long-Term Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>996031 - Disclosure - INCOME TAXES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/INCOMETAXESDetails</Role>
      <ShortName>INCOME TAXES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/INCOMETAXESTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>996032 - Disclosure - INCOME TAXES - Components of Income Tax Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ComponentsofIncomeTaxExpenseTable</Role>
      <ShortName>INCOME TAXES - Components of Income Tax Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>996033 - Disclosure - INCOME TAXES - Income Taxes Paid (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/IncomeTaxesPaidTable</Role>
      <ShortName>INCOME TAXES - Income Taxes Paid (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>996034 - Disclosure - INCOME TAXES - Reconciliation of Effective Tax Rate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ReconciliationofEffectiveTaxRateTable</Role>
      <ShortName>INCOME TAXES - Reconciliation of Effective Tax Rate (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>996035 - Disclosure - INCOME TAXES - Deferred Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/DeferredIncomeTaxesTable</Role>
      <ShortName>INCOME TAXES - Deferred Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>996036 - Disclosure - INCOME TAXES - Schedule of Valuation Allowance (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ScheduleofValuationAllowanceTable</Role>
      <ShortName>INCOME TAXES - Schedule of Valuation Allowance (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>996037 - Disclosure - INCOME TAXES - Schedule of Unrecognized Tax Benefits Roll Forward (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ScheduleofUnrecognizedTaxBenefitsRollForwardTable</Role>
      <ShortName>INCOME TAXES - Schedule of Unrecognized Tax Benefits Roll Forward (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>996038 - Disclosure - PREFERRED STOCK (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/PREFERREDSTOCKDetails</Role>
      <ShortName>PREFERRED STOCK (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/PREFERREDSTOCK</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>996039 - Disclosure - COMMON STOCK AND ADDITIONAL PAID-IN CAPITAL (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/COMMONSTOCKANDADDITIONALPAIDINCAPITALDetails</Role>
      <ShortName>COMMON STOCK AND ADDITIONAL PAID-IN CAPITAL (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/COMMONSTOCKANDADDITIONALPAIDINCAPITAL</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>996040 - Disclosure - DEBT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/DEBTDetails</Role>
      <ShortName>DEBT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/DEBTTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>996041 - Disclosure - DEBT - Schedule of Long-term debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ScheduleofLongtermdebtTable</Role>
      <ShortName>DEBT - Schedule of Long-term debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>996042 - Disclosure - DEBT - Future Minimum Payments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/FutureMinimumPaymentsTable</Role>
      <ShortName>DEBT - Future Minimum Payments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>996043 - Disclosure - STOCK COMPENSATION PLANS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/STOCKCOMPENSATIONPLANSDetails</Role>
      <ShortName>STOCK COMPENSATION PLANS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/STOCKCOMPENSATIONPLANSTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>996044 - Disclosure - STOCK COMPENSATION PLANS - Changes in Shares of Class A Non-Voting Stock Under Option (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ChangesinSharesofClassANonVotingStockUnderOptionTable</Role>
      <ShortName>STOCK COMPENSATION PLANS - Changes in Shares of Class A Non-Voting Stock Under Option (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>996045 - Disclosure - STOCK COMPENSATION PLANS - Changes in Restricted Stock Awards (RSA) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/ChangesinRestrictedStockAwardsRSATable</Role>
      <ShortName>STOCK COMPENSATION PLANS - Changes in Restricted Stock Awards (RSA) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>996046 - Disclosure - EMPLOYEE BENEFIT PLANS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/EMPLOYEEBENEFITPLANSDetails</Role>
      <ShortName>EMPLOYEE BENEFIT PLANS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/EMPLOYEEBENEFITPLANS</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>996047 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/COMMITMENTSANDCONTINGENCIESDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/COMMITMENTSANDCONTINGENCIESTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>996048 - Disclosure - COMMITMENTS AND CONTINGENCIES - Minimum Annual Purchase Commitments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/MinimumAnnualPurchaseCommitmentsTable</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Minimum Annual Purchase Commitments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>996049 - Disclosure - COMMITMENTS AND CONTINGENCIES - Budgeted Mandatory Utility Plant Expenditures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/BudgetedMandatoryUtilityPlantExpendituresTable</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Budgeted Mandatory Utility Plant Expenditures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>996050 - Disclosure - GEOGRAPHIC CONCENTRATION OF CUSTOMERS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/GEOGRAPHICCONCENTRATIONOFCUSTOMERSDetails</Role>
      <ShortName>GEOGRAPHIC CONCENTRATION OF CUSTOMERS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/GEOGRAPHICCONCENTRATIONOFCUSTOMERS</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>996051 - Disclosure - REGULATORY PROCEEDINGS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/REGULATORYPROCEEDINGSDetails</Role>
      <ShortName>REGULATORY PROCEEDINGS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/REGULATORYPROCEEDINGSTables</ParentRole>
      <Position>81</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>996052 - Disclosure - REGULATORY PROCEEDINGS - Eligible Plant Improvements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/EligiblePlantImprovementsTable</Role>
      <ShortName>REGULATORY PROCEEDINGS - Eligible Plant Improvements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>996053 - Disclosure - NET INCOME PER COMMON SHARE AND EQUITY PER COMMON SHARE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/NETINCOMEPERCOMMONSHAREANDEQUITYPERCOMMONSHAREDetails</Role>
      <ShortName>NET INCOME PER COMMON SHARE AND EQUITY PER COMMON SHARE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/NETINCOMEPERCOMMONSHAREANDEQUITYPERCOMMONSHARETables</ParentRole>
      <Position>83</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>996054 - Disclosure - NET INCOME PER COMMON SHARE AND EQUITY PER COMMON SHARE - Shares Used in Computing Basic and Diluted Net Income Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/SharesUsedinComputingBasicandDilutedNetIncomePerShareTable</Role>
      <ShortName>NET INCOME PER COMMON SHARE AND EQUITY PER COMMON SHARE - Shares Used in Computing Basic and Diluted Net Income Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>996055 - Disclosure - LEGAL PROCEEDINGS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/LEGALPROCEEDINGSDetails</Role>
      <ShortName>LEGAL PROCEEDINGS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/LEGALPROCEEDINGS</ParentRole>
      <Position>85</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>996056 - Disclosure - BUSINESS SEGMENT INFORMATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/BUSINESSSEGMENTINFORMATIONDetails</Role>
      <ShortName>BUSINESS SEGMENT INFORMATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/BUSINESSSEGMENTINFORMATIONTables</ParentRole>
      <Position>86</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>996057 - Disclosure - BUSINESS SEGMENT INFORMATION - Segment Reporting Information, by Segment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/SegmentReportingInformationbySegmentTable</Role>
      <ShortName>BUSINESS SEGMENT INFORMATION - Segment Reporting Information, by Segment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="form10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>996058 - Disclosure - SUBSEQUENT EVENT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://artesianwater.com/role/SUBSEQUENTEVENTDetails</Role>
      <ShortName>SUBSEQUENT EVENT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://artesianwater.com/role/SUBSEQUENTEVENT</ParentRole>
      <Position>88</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>artna-20251231.xsd</File>
    <File>artna-20251231_cal.xml</File>
    <File>artna-20251231_def.xml</File>
    <File>artna-20251231_lab.xml</File>
    <File>artna-20251231_pre.xml</File>
    <File doctype="10-K" isDefinitelyFs="true" isUsgaap="true" original="form10k.htm">form10k.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>image1.jpg</File>
    <File>image_2.gif</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="1">http://fasb.org/srt/2025</BaseTaxonomy>
    <BaseTaxonomy items="1234">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="16">http://xbrl.sec.gov/cyd/2025</BaseTaxonomy>
    <BaseTaxonomy items="39">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="4">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
