<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>316</ContextCount>
  <ElementCount>428</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>89</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>9</UnitCount>
  <MyReports>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0002 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>0003 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>0004 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveIncomeLoss</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>0005 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' DEFICIT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ConsolidatedStatementsOfShareholdersDeficit</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF SHAREHOLDERS' DEFICIT</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>0006 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>0007 - Disclosure - ORGANIZATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-o</Role>
      <ShortName>ORGANIZATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>0008 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-sap</Role>
      <ShortName>SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>0009 - Disclosure - PREPAID EXPENSES AND OTHER CURRENT ASSETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/PrepaidExpensesAndOtherCurrentAssets</Role>
      <ShortName>PREPAID EXPENSES AND OTHER CURRENT ASSETS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>0010 - Disclosure - INVESTMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/Investments</Role>
      <ShortName>INVESTMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>0011 - Disclosure - PROPERTY AND EQUIPMENT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-pae</Role>
      <ShortName>PROPERTY AND EQUIPMENT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>0012 - Disclosure - LEASES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/Leases</Role>
      <ShortName>LEASES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>0013 - Disclosure - GOODWILL</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/Goodwill</Role>
      <ShortName>GOODWILL</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>0014 - Disclosure - FINANCIAL INSTITUTIONS PAYABLE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-npb</Role>
      <ShortName>FINANCIAL INSTITUTIONS PAYABLE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>0015 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-aeaocl</Role>
      <ShortName>ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>0016 - Disclosure - OTHER LIABILITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/OtherLiabilities</Role>
      <ShortName>OTHER LIABILITIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>0017 - Disclosure - REDEEMABLE NON-CONTROLLING INTERESTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/RedeemableNon-controllingInterests</Role>
      <ShortName>REDEEMABLE NON-CONTROLLING INTERESTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>0018 - Disclosure - GOVERNMENTAL SUPPORT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/GOVERNMENTALSUPPORT</Role>
      <ShortName>GOVERNMENTAL SUPPORT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>0019 - Disclosure - STOCK-BASED COMPENSATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-sc</Role>
      <ShortName>STOCK-BASED COMPENSATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>0020 - Disclosure - OTHER INCOME, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-oie</Role>
      <ShortName>OTHER INCOME, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>0021 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-it</Role>
      <ShortName>INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>0022 - Disclosure - RELATED PARTY TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-rpt</Role>
      <ShortName>RELATED PARTY TRANSACTIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>0023 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-cac</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>0024 - Disclosure - SEGMENT AND GEOGRAPHICAL INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-sagi1</Role>
      <ShortName>SEGMENT AND GEOGRAPHICAL INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.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>25</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995447 - Disclosure - Insider Trading Policies and Procedures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc</Role>
      <ShortName>Insider Trading Policies and Procedures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.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>27</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>9960701 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-sapp</Role>
      <ShortName>SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>9960702 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-sapt</Role>
      <ShortName>SIGNIFICANT ACCOUNTING POLICIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-sap</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>9960703 - Disclosure - PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/PrepaidExpensesAndOtherCurrentAssetsTables</Role>
      <ShortName>PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://icts-int.com/role/PrepaidExpensesAndOtherCurrentAssets</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>9960704 - Disclosure - INVESTMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/INVESTMENTSTable</Role>
      <ShortName>INVESTMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://icts-int.com/role/Investments</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>9960705 - Disclosure - PROPERTY AND EQUIPMENT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-paet</Role>
      <ShortName>PROPERTY AND EQUIPMENT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-pae</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>9960706 - Disclosure - LEASES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/LeasesTables</Role>
      <ShortName>LEASES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://icts-int.com/role/Leases</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>9960707 - Disclosure - GOODWILL (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/GoodwillTables</Role>
      <ShortName>GOODWILL (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://icts-int.com/role/Goodwill</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>9960708 - Disclosure - FINANCIAL INSTITUTIONS PAYABLE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/NOTESPAYABLEFINANCIALINSTITUTIONSTables</Role>
      <ShortName>FINANCIAL INSTITUTIONS PAYABLE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-npb</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9960709 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/AccruedExpensesAndOtherCurrentLiabilitiesTables</Role>
      <ShortName>ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-aeaocl</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>9960710 - Disclosure - OTHER LIABILITIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/OtherLiabilitiesTables</Role>
      <ShortName>OTHER LIABILITIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://icts-int.com/role/OtherLiabilities</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>9960711 - Disclosure - REDEEMABLE NON-CONTROLLING INTERESTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/RedeemableNon-controllingInterestsTables</Role>
      <ShortName>REDEEMABLE NON-CONTROLLING INTERESTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://icts-int.com/role/RedeemableNon-controllingInterests</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9960712 - Disclosure - STOCK-BASED COMPENSATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-sct</Role>
      <ShortName>STOCK-BASED COMPENSATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-sc</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9960713 - Disclosure - OTHER INCOME, NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/OtherExpenseTables</Role>
      <ShortName>OTHER INCOME, NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-oie</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9960714 - Disclosure - INCOME TAXES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/IncomeTaxesTables</Role>
      <ShortName>INCOME TAXES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-it</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9960715 - Disclosure - SEGMENT AND GEOGRAPHICAL INFORMATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/SegmentAndGeographicalInformationTables</Role>
      <ShortName>SEGMENT AND GEOGRAPHICAL INFORMATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-sagi1</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9960716 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/SignificantAccountingPoliciesNarrativeDetails</Role>
      <ShortName>SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-sapt</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9960717 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Schedule of Reconciliation of Cash and Restricted Cash) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/SignificantAccountingPoliciesScheduleOfReconciliationOfCashAndRestrictedCashDetails</Role>
      <ShortName>SIGNIFICANT ACCOUNTING POLICIES (Schedule of Reconciliation of Cash and Restricted Cash) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-sapt</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9960718 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Schedule of Property and Equipment Estimated Useful Lives) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ictsf-sapd</Role>
      <ShortName>SIGNIFICANT ACCOUNTING POLICIES (Schedule of Property and Equipment Estimated Useful Lives) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-sapt</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9960719 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Schedule of Revenues Segments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/SignificantAccountingPoliciesScheduleOfRevenuesSegmentsDetails</Role>
      <ShortName>SIGNIFICANT ACCOUNTING POLICIES (Schedule of Revenues Segments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-sapt</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9960720 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Schedule of Disaggregated by Geography and Percentage of Revenues) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/SignificantAccountingPoliciesScheduleOfDisaggregatedByGeographyAndPercentageOfRevenuesDetails</Role>
      <ShortName>SIGNIFICANT ACCOUNTING POLICIES (Schedule of Disaggregated by Geography and Percentage of Revenues) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-sapt</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9960721 - Disclosure - PREPAID EXPENSES AND OTHER CURRENT ASSETS  (Schedule of Prepaid Expenses and Other Current Assets Consist) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/PrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsConsistDetails</Role>
      <ShortName>PREPAID EXPENSES AND OTHER CURRENT ASSETS  (Schedule of Prepaid Expenses and Other Current Assets Consist) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/PrepaidExpensesAndOtherCurrentAssetsTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>9960722 - Disclosure - INVESTMENTS (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/InvestmentsNarrativeDetails</Role>
      <ShortName>INVESTMENTS (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/INVESTMENTSTable</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>9960723 - Disclosure - INVESTMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/INVESTMENTSDetails</Role>
      <ShortName>INVESTMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/INVESTMENTSTable</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>9960724 - Disclosure - PROPERTY AND EQUIPMENT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/PropertyAndEquipmentDetails</Role>
      <ShortName>PROPERTY AND EQUIPMENT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-paet</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>9960725 - Disclosure - LEASES (Schedule of Components of Lease Expense) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/LeaseScheduleOfComponentsOfLeaseExpenseDetails</Role>
      <ShortName>LEASES (Schedule of Components of Lease Expense) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/LeasesTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>9960726 - Disclosure - LEASES (Schedule of Supplemental Balance Sheet Information Related to Leases) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/LeasesScheduleOfSupplementalBalanceSheetInformationRelatedToLeasesDetails</Role>
      <ShortName>LEASES (Schedule of Supplemental Balance Sheet Information Related to Leases) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/LeasesTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>9960727 - Disclosure - LEASES (Schedule of Future Minimum Lease Payments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/LeasesScheduleOfFutureMinimumLeasePaymentsDetails</Role>
      <ShortName>LEASES (Schedule of Future Minimum Lease Payments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/LeasesTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>9960728 - Disclosure - GOODWILL (Schedule of Goodwill) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/GoodwillScheduleOfGoodwillDetails</Role>
      <ShortName>GOODWILL (Schedule of Goodwill) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/GoodwillTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>9960729 - Disclosure - FINANCIAL INSTITUTIONS PAYABLE - Financial institutions (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/NotesPayable-BanksDetails</Role>
      <ShortName>FINANCIAL INSTITUTIONS PAYABLE - Financial institutions (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>9960730 - Disclosure - FINANCIAL INSTITUTIONS PAYABLE - (Schedule of Financial Institutions) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/NOTESPAYABLEFINANCIALINSTITUTIONSDetails</Role>
      <ShortName>FINANCIAL INSTITUTIONS PAYABLE - (Schedule of Financial Institutions) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/NOTESPAYABLEFINANCIALINSTITUTIONSTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>9960731 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/AccruedExpensesAndOtherCurrentLiabilitiesDetails</Role>
      <ShortName>ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/AccruedExpensesAndOtherCurrentLiabilitiesTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>9960732 - Disclosure - OTHER LIABILITIES (Schedule of Other Liabilities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/OtherLiabilitiesScheduleOfOtherLiabilitiesDetails</Role>
      <ShortName>OTHER LIABILITIES (Schedule of Other Liabilities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/OtherLiabilitiesTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>9960733 - Disclosure - REDEEMABLE NON-CONTROLLING INTERESTS (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/RedeemableNon-controllingInterestsNarrativeDetails</Role>
      <ShortName>REDEEMABLE NON-CONTROLLING INTERESTS (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/RedeemableNon-controllingInterestsTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>9960734 - Disclosure - REDEEMABLE NON-CONTROLLING INTERESTS (Schedule of Redeemable Non-controlling Interests) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/RedeemableNon-controllingInterestsScheduleOfRedeemableNon-controllingInterestsDetails</Role>
      <ShortName>REDEEMABLE NON-CONTROLLING INTERESTS (Schedule of Redeemable Non-controlling Interests) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/RedeemableNon-controllingInterestsTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>9960735 - Disclosure - GOVERNMENTAL SUPPORT (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/GOVERNMENTALSUPPORTDetailTextuals</Role>
      <ShortName>GOVERNMENTAL SUPPORT (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/GOVERNMENTALSUPPORT</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>9960736 - Disclosure - STOCK-BASED COMPENSATION (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/Stock-basedCompensationNarrativeDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-sct</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>9960737 - Disclosure - STOCK-BASED COMPENSATION (Schedule of Stock Option Activity for Subsidiary) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/Stock-basedCompensationScheduleOfStockOptionActivityForSubsidiaryDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION (Schedule of Stock Option Activity for Subsidiary) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-sct</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>9960738 - Disclosure - OTHER INCOME, NET (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/OtherExpenseDetails</Role>
      <ShortName>OTHER INCOME, NET (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/OtherExpenseTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>9960739 - Disclosure - INCOME TAXES (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/IncomeTaxesIncomeTaxBenefitExpenseDetails</Role>
      <ShortName>INCOME TAXES (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/IncomeTaxesTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>9960740 - Disclosure - INCOME TAXES (Narrative) (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/IncomeTaxesNarrativeDetails</Role>
      <ShortName>INCOME TAXES (Narrative) (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/IncomeTaxesTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>9960741 - Disclosure - INCOME TAXES (Schedule of Components of Income (Loss) before Income Tax Benefit (Expense) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/IncomeTaxesComponentsOfIncomeLossBeforeIncomeTaxBenefitExpenseDetails</Role>
      <ShortName>INCOME TAXES (Schedule of Components of Income (Loss) before Income Tax Benefit (Expense) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/IncomeTaxesTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>9960742 - Disclosure - INCOME TAXES (Schedule of Deferred Tax Assets and Liabilities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails</Role>
      <ShortName>INCOME TAXES (Schedule of Deferred Tax Assets and Liabilities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/IncomeTaxesTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>9960743 - Disclosure - INCOME TAXES (Schedule of Effective Income Tax Rate Reconciliation) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/IncomeTaxesEffectiveIncomeTaxRateReconciliationDetails</Role>
      <ShortName>INCOME TAXES (Schedule of Effective Income Tax Rate Reconciliation) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/IncomeTaxesTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>9960744 - Disclosure - INCOME TAXES (Schedule of Cash paid for Income Taxes, Net of Refunds) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/IncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateDetails</Role>
      <ShortName>INCOME TAXES (Schedule of Cash paid for Income Taxes, Net of Refunds) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/IncomeTaxesTables</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>9960745 - Disclosure - INCOME TAXES (Schedule of Reconciliation of Unrecognized Tax Benefits) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/INCOMETAXESReconciliationOfUnrecognizedTaxBenefitsDetails</Role>
      <ShortName>INCOME TAXES (Schedule of Reconciliation of Unrecognized Tax Benefits) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/IncomeTaxesTables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>9960746 - Disclosure - RELATED PARTY TRANSACTIONS (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/RelatedPartyTransactionsDetails</Role>
      <ShortName>RELATED PARTY TRANSACTIONS (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-rpt</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>9960747 - Disclosure - COMMITMENTS AND CONTINGENCIES (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/CommitmentsAndContingenciesNarrativeDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/ictsf-cac</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>9960748 - Disclosure - SEGMENT AND GEOGRAPHICAL INFORMATION (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/SEGMENTANDGEOGRAPHICALINFORMATIONNarrativeDetails</Role>
      <ShortName>SEGMENT AND GEOGRAPHICAL INFORMATION (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/SegmentAndGeographicalInformationTables</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>9960749 - Disclosure - SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Operating Results by Segment) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/SegmentAndGeographicalInformationSummaryOfOperatingResultsBySegmentDetails</Role>
      <ShortName>SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Operating Results by Segment) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/SegmentAndGeographicalInformationTables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>9960750 - Disclosure - SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Revenue by Country) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/SegmentAndGeographicalInformationRevenueByCountryDetails</Role>
      <ShortName>SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Revenue by Country) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/SegmentAndGeographicalInformationTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>9960751 - Disclosure - SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Property and Equipment by Country) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/SegmentAndGeographicalInformationPropertyAndEquipmentByCountryDetails</Role>
      <ShortName>SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Property and Equipment by Country) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://icts-int.com/role/SegmentAndGeographicalInformationTables</ParentRole>
      <Position>78</Position>
    </Report>
    <Report instance="zk2635115.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>9960752 - Schedule - Valuation And Qualifying Accounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://icts-int.com/role/ValuationAndQualifyingAccountsDetails</Role>
      <ShortName>Valuation And Qualifying Accounts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>ictsf-20251231.xsd</File>
    <File>ictsf-20251231_cal.xml</File>
    <File>ictsf-20251231_def.xml</File>
    <File>ictsf-20251231_lab.xml</File>
    <File>ictsf-20251231_pre.xml</File>
    <File doctype="20-F" isDefinitelyFs="true" isUsgaap="true" original="zk2635115.htm">zk2635115.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="1214">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="17">http://xbrl.sec.gov/cyd/2025</BaseTaxonomy>
    <BaseTaxonomy items="43">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="1">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>