<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.3</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>243</ContextCount>
  <ElementCount>291</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>55</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>7</UnitCount>
  <MyReports>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>995200090 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>995200100 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/StatementCondensedConsolidatedStatementsOfFinancialCondition</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>995200105 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/StatementCondensedConsolidatedStatementsOfFinancialConditionParenthetical</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>995200200 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/StatementCondensedConsolidatedStatementsOfOperations</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>995200300 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/StatementCondensedConsolidatedStatementsOfComprehensiveIncomeLoss</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>995200400 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/StatementCondensedConsolidatedStatementsOfChangesInStockholdersEquity</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>995200500 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/StatementCondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>995200505 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/StatementCondensedConsolidatedStatementsOfCashFlowsParenthetical</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>995210101 - Disclosure - ORGANIZATION, DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureOrganizationDescriptionOfBusinessAndBasisOfPresentation</Role>
      <ShortName>ORGANIZATION, DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995210201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995210301 - Disclosure - MERGER AND RECAPITALIZATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureMergerAndRecapitalization</Role>
      <ShortName>MERGER AND RECAPITALIZATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995210401 - Disclosure - REVENUES FROM CONTRACTS WITH CUSTOMERS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureRevenuesFromContractsWithCustomers</Role>
      <ShortName>REVENUES FROM CONTRACTS WITH CUSTOMERS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995210501 - Disclosure - FAIR VALUE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureFairValue</Role>
      <ShortName>FAIR VALUE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995210601 - Disclosure - DEBT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureDebt</Role>
      <ShortName>DEBT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995210701 - Disclosure - PROMISSORY NOTES - AFFILIATES</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosurePromissoryNotesAffiliates</Role>
      <ShortName>PROMISSORY NOTES - AFFILIATES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995210801 - Disclosure - SERIES A REDEEMABLE CONVERTIBLE PREFERRED STOCK</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureSeriesRedeemableConvertiblePreferredStock</Role>
      <ShortName>SERIES A REDEEMABLE CONVERTIBLE PREFERRED STOCK</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>995210901 - Disclosure - SERIES B CONVERTIBLE PREFERRED STOCK</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureSeriesBConvertiblePreferredStock</Role>
      <ShortName>SERIES B CONVERTIBLE PREFERRED STOCK</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>995211001 - Disclosure - SHARE-BASED COMPENSATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureShareBasedCompensation</Role>
      <ShortName>SHARE-BASED COMPENSATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>995211101 - Disclosure - WARRANTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureWarrants</Role>
      <ShortName>WARRANTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995211201 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>995211301 - Disclosure - NET INCOME (LOSS) PER SHARE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureNetIncomeLossPerShare</Role>
      <ShortName>NET INCOME (LOSS) PER SHARE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>995211401 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995211501 - Disclosure - COMMON STOCK, PREFERRED STOCK AND STOCKHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureCommonStockPreferredStockAndStockholdersEquity</Role>
      <ShortName>COMMON STOCK, PREFERRED STOCK AND STOCKHOLDERS' EQUITY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995211601 - Disclosure - NET CAPITAL REQUIREMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureNetCapitalRequirements</Role>
      <ShortName>NET CAPITAL REQUIREMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995211701 - Disclosure - CREDIT RISK AND CONCENTRATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureCreditRiskAndConcentrations</Role>
      <ShortName>CREDIT RISK AND CONCENTRATIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995211801 - Disclosure - SEGMENT INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureSegmentInformation</Role>
      <ShortName>SEGMENT INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>995211901 - Disclosure - SUBSEQUENT EVENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureSubsequentEvents</Role>
      <ShortName>SUBSEQUENT EVENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.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>28</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.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>29</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>99920202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>99930403 - Disclosure - REVENUES FROM CONTRACTS WITH CUSTOMERS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureRevenuesFromContractsWithCustomersTables</Role>
      <ShortName>REVENUES FROM CONTRACTS WITH CUSTOMERS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureRevenuesFromContractsWithCustomers</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>99930603 - Disclosure - DEBT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureDebtTables</Role>
      <ShortName>DEBT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureDebt</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>99931003 - Disclosure - SHARE-BASED COMPENSATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureShareBasedCompensationTables</Role>
      <ShortName>SHARE-BASED COMPENSATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureShareBasedCompensation</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>99931103 - Disclosure - WARRANTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureWarrantsTables</Role>
      <ShortName>WARRANTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureWarrants</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>99931303 - Disclosure - NET INCOME (LOSS) PER SHARE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureNetIncomeLossPerShareTables</Role>
      <ShortName>NET INCOME (LOSS) PER SHARE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureNetIncomeLossPerShare</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>99940101 - Disclosure - ORGANIZATION, DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureOrganizationDescriptionOfBusinessAndBasisOfPresentationDetails</Role>
      <ShortName>ORGANIZATION, DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureOrganizationDescriptionOfBusinessAndBasisOfPresentation</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>99940201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Share-Based Compensation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureSummaryOfSignificantAccountingPoliciesShareBasedCompensationDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Share-Based Compensation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>99940202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cash, Cash Equivalents and Restricted Cash (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureSummaryOfSignificantAccountingPoliciesCashCashEquivalentsAndRestrictedCashDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cash, Cash Equivalents and Restricted Cash (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>99940203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Financial Instruments - Credit Losses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureSummaryOfSignificantAccountingPoliciesFinancialInstrumentsCreditLossesDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Financial Instruments - Credit Losses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>99940204 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Goodwill and Other Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureSummaryOfSignificantAccountingPoliciesGoodwillAndOtherIntangibleAssetsDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Goodwill and Other Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>99940301 - Disclosure - MERGER AND RECAPITALIZATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureMergerAndRecapitalizationDetails</Role>
      <ShortName>MERGER AND RECAPITALIZATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureMergerAndRecapitalization</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>99940401 - Disclosure - REVENUES FROM CONTRACTS WITH CUSTOMERS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureRevenuesFromContractsWithCustomersDetails</Role>
      <ShortName>REVENUES FROM CONTRACTS WITH CUSTOMERS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureRevenuesFromContractsWithCustomersTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>99940601 - Disclosure - DEBT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureDebtDetails</Role>
      <ShortName>DEBT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureDebtTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>99940602 - Disclosure - DEBT - Maturities of the notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureDebtMaturitiesOfNotesDetails</Role>
      <ShortName>DEBT - Maturities of the notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>99940701 - Disclosure - PROMISSORY NOTES - AFFILIATES (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosurePromissoryNotesAffiliatesDetails</Role>
      <ShortName>PROMISSORY NOTES - AFFILIATES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosurePromissoryNotesAffiliates</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>99940801 - Disclosure - SERIES A REDEEMABLE CONVERTIBLE PREFERRED STOCK (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureSeriesRedeemableConvertiblePreferredStockDetails</Role>
      <ShortName>SERIES A REDEEMABLE CONVERTIBLE PREFERRED STOCK (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureSeriesRedeemableConvertiblePreferredStock</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>99940901 - Disclosure - SERIES B CONVERTIBLE PREFERRED STOCK (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureSeriesBConvertiblePreferredStockDetails</Role>
      <ShortName>SERIES B CONVERTIBLE PREFERRED STOCK (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureSeriesBConvertiblePreferredStock</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>99941001 - Disclosure - SHARE-BASED COMPENSATION - Narratives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureShareBasedCompensationNarrativesDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Narratives (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>99941002 - Disclosure - SHARE-BASED COMPENSATION - Stock options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureShareBasedCompensationStockOptionsDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Stock options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>99941003 - Disclosure - SHARE-BASED COMPENSATION - Restricted Stock and Stock Units (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureShareBasedCompensationRestrictedStockAndStockUnitsDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Restricted Stock and Stock Units (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>99941101 - Disclosure - WARRANTS - Warrant outstanding (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureWarrantsWarrantOutstandingDetails</Role>
      <ShortName>WARRANTS - Warrant outstanding (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>99941102 - Disclosure - WARRANTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureWarrantsDetails</Role>
      <ShortName>WARRANTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureWarrantsTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>99941201 - Disclosure - INCOME TAXES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureIncomeTaxesDetails</Role>
      <ShortName>INCOME TAXES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>99941301 - Disclosure - NET INCOME (LOSS) PER SHARE - Computation of loss per share and weighted average of the company's common stock outstanding (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureNetIncomeLossPerShareComputationOfLossPerShareAndWeightedAverageOfCompanySCommonStockOutstandingDetails</Role>
      <ShortName>NET INCOME (LOSS) PER SHARE - Computation of loss per share and weighted average of the company's common stock outstanding (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureNetIncomeLossPerShareTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>99941302 - Disclosure - NET INCOME (LOSS) PER SHARE - Securities that have been excluded from the calculation of weighted-average shares for diluted earnings per share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureNetIncomeLossPerShareSecuritiesThatHaveBeenExcludedFromCalculationOfWeightedAverageSharesForDilutedEarningsPerShareDetails</Role>
      <ShortName>NET INCOME (LOSS) PER SHARE - Securities that have been excluded from the calculation of weighted-average shares for diluted earnings per share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureNetIncomeLossPerShareTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>99941501 - Disclosure - COMMON STOCK, PREFERRED STOCK AND STOCKHOLDERS' EQUITY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureCommonStockPreferredStockAndStockholdersEquityDetails</Role>
      <ShortName>COMMON STOCK, PREFERRED STOCK AND STOCKHOLDERS' EQUITY (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureCommonStockPreferredStockAndStockholdersEquity</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>99941601 - Disclosure - NET CAPITAL REQUIREMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureNetCapitalRequirementsDetails</Role>
      <ShortName>NET CAPITAL REQUIREMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureNetCapitalRequirements</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="tmb-20250930x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>99941801 - Disclosure - SEGMENT INFORMATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.binahcapitalgroupInc.com/role/DisclosureSegmentInformationDetails</Role>
      <ShortName>SEGMENT INFORMATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.binahcapitalgroupInc.com/role/DisclosureSegmentInformation</ParentRole>
      <Position>58</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>tmb-20250930.xsd</File>
    <File>tmb-20250930_cal.xml</File>
    <File>tmb-20250930_def.xml</File>
    <File>tmb-20250930_lab.xml</File>
    <File>tmb-20250930_pre.xml</File>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="tmb-20250930x10q.htm">tmb-20250930x10q.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="589">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="33">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>
