<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>246</ContextCount>
  <ElementCount>296</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>78</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>5</UnitCount>
  <MyReports>
    <Report instance="xelb-20260630x10q.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.xcelbrands.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>995200100 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/StatementCondensedConsolidatedBalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>995200105 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/StatementCondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="xelb-20260630x10q.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.xcelbrands.com/role/StatementCondensedConsolidatedStatementsOfOperations</Role>
      <ShortName>Condensed Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>995200300 - Statement - Condensed Consolidated Statements of Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/StatementCondensedConsolidatedStatementsOfStockholdersEquity</Role>
      <ShortName>Condensed Consolidated Statements of Stockholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>995200400 - Statement - Condensed Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/StatementCondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>995210101 - Disclosure - Nature of Operations, Background, and Basis of Presentation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureNatureOfOperationsBackgroundAndBasisOfPresentation</Role>
      <ShortName>Nature of Operations, Background, and Basis of Presentation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>995210201 - Disclosure - Divestitures, Investments in Unconsolidated Affiliates, and Variable Interest Entities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureDivestituresInvestmentsInUnconsolidatedAffiliatesAndVariableInterestEntities</Role>
      <ShortName>Divestitures, Investments in Unconsolidated Affiliates, and Variable Interest Entities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>995210301 - Disclosure - Trademarks and Other Intangibles</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureTrademarksAndOtherIntangibles</Role>
      <ShortName>Trademarks and Other Intangibles</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995210401 - Disclosure - Significant Contracts and Concentrations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureSignificantContractsAndConcentrations</Role>
      <ShortName>Significant Contracts and Concentrations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995210501 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureLeases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995210601 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureDebt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995210701 - Disclosure - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureStockholdersEquity</Role>
      <ShortName>Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995210801 - Disclosure - Earnings (Loss) Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureEarningsLossPerShare</Role>
      <ShortName>Earnings (Loss) Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995210901 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995211001 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureRelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>995211101 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>995211201 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureSubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.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>19</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.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>20</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>99920102 - Disclosure - Nature of Operations, Background, and Basis of Presentation (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureNatureOfOperationsBackgroundAndBasisOfPresentationPolicies</Role>
      <ShortName>Nature of Operations, Background, and Basis of Presentation (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>99930303 - Disclosure - Trademarks and Other Intangibles (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureTrademarksAndOtherIntangiblesTables</Role>
      <ShortName>Trademarks and Other Intangibles (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.xcelbrands.com/role/DisclosureTrademarksAndOtherIntangibles</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>99930503 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureLeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.xcelbrands.com/role/DisclosureLeases</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>99930603 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureDebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.xcelbrands.com/role/DisclosureDebt</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>99930703 - Disclosure - Stockholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureStockholdersEquityTables</Role>
      <ShortName>Stockholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.xcelbrands.com/role/DisclosureStockholdersEquity</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>99930803 - Disclosure - Earnings (Loss) Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureEarningsLossPerShareTables</Role>
      <ShortName>Earnings (Loss) Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.xcelbrands.com/role/DisclosureEarningsLossPerShare</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>99940101 - Disclosure - Nature of Operations, Background, and Basis of Presentation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureNatureOfOperationsBackgroundAndBasisOfPresentationDetails</Role>
      <ShortName>Nature of Operations, Background, and Basis of Presentation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.xcelbrands.com/role/DisclosureNatureOfOperationsBackgroundAndBasisOfPresentationPolicies</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>99940201 - Disclosure - Divestitures, Investments in Unconsolidated Affiliates, and Variable Interest Entities - Investment in IM Topco, LLC (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureDivestituresInvestmentsInUnconsolidatedAffiliatesAndVariableInterestEntitiesInvestmentInImTopcoLlcDetails</Role>
      <ShortName>Divestitures, Investments in Unconsolidated Affiliates, and Variable Interest Entities - Investment in IM Topco, LLC (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>99940202 - Disclosure - Divestitures, Investments in Unconsolidated Affiliates, and Variable Interest Entities - Sale of Judith Ripka Brand (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureDivestituresInvestmentsInUnconsolidatedAffiliatesAndVariableInterestEntitiesSaleOfJudithRipkaBrandDetails</Role>
      <ShortName>Divestitures, Investments in Unconsolidated Affiliates, and Variable Interest Entities - Sale of Judith Ripka Brand (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>99940203 - Disclosure - Divestitures, Investments in Unconsolidated Affiliates, and Variable Interest Entities - Longaberger Licensing, LLC VIE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureDivestituresInvestmentsInUnconsolidatedAffiliatesAndVariableInterestEntitiesLongabergerLicensingLlcVieDetails</Role>
      <ShortName>Divestitures, Investments in Unconsolidated Affiliates, and Variable Interest Entities - Longaberger Licensing, LLC VIE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>99940301 - Disclosure - Trademarks and Other Intangibles - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureTrademarksAndOtherIntangiblesNarrativeDetails</Role>
      <ShortName>Trademarks and Other Intangibles - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>99940302 - Disclosure - Trademarks and Other Intangibles - Schedule of Trademarks and Other Intangibles (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureTrademarksAndOtherIntangiblesScheduleOfTrademarksAndOtherIntangiblesDetails</Role>
      <ShortName>Trademarks and Other Intangibles - Schedule of Trademarks and Other Intangibles (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>99940401 - Disclosure - Significant Contracts and Concentrations - Halston Master License (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureSignificantContractsAndConcentrationsHalstonMasterLicenseDetails</Role>
      <ShortName>Significant Contracts and Concentrations - Halston Master License (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>99940402 - Disclosure - Significant Contracts and Concentrations - Qurate Agreement (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureSignificantContractsAndConcentrationsQurateAgreementDetails</Role>
      <ShortName>Significant Contracts and Concentrations - Qurate Agreement (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>99940403 - Disclosure - Significant Contracts and Concentrations - JTV / America's Collectibles Network, Inc. (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureSignificantContractsAndConcentrationsJtvAmericaSCollectiblesNetworkIncDetails</Role>
      <ShortName>Significant Contracts and Concentrations - JTV / America's Collectibles Network, Inc. (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>99940501 - Disclosure - Leases - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureLeasesNarrativeDetails</Role>
      <ShortName>Leases - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>99940502 - Disclosure - Leases - Maturities of Future Lease Obligations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureLeasesMaturitiesOfFutureLeaseObligationsDetails</Role>
      <ShortName>Leases - Maturities of Future Lease Obligations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>99940601 - Disclosure - Debt - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureDebtNarrativeDetails</Role>
      <ShortName>Debt - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>99940602 - Disclosure - Debt - Net Carrying Amount of Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureDebtNetCarryingAmountOfDebtDetails</Role>
      <ShortName>Debt - Net Carrying Amount of Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>99940701 - Disclosure - Stockholders' Equity - Equity Line Facility (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureStockholdersEquityEquityLineFacilityDetails</Role>
      <ShortName>Stockholders' Equity - Equity Line Facility (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>99940702 - Disclosure - Stockholders' Equity - Equity Incentive Plans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureStockholdersEquityEquityIncentivePlansDetails</Role>
      <ShortName>Stockholders' Equity - Equity Incentive Plans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>99940703 - Disclosure - Stockholders' Equity - Stock-based Compensation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureStockholdersEquityStockBasedCompensationDetails</Role>
      <ShortName>Stockholders' Equity - Stock-based Compensation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>99940704 - Disclosure - Stockholders' Equity - Stock Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureStockholdersEquityStockOptionsDetails</Role>
      <ShortName>Stockholders' Equity - Stock Options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>99940705 - Disclosure - Stockholders' Equity - Non-Vested Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureStockholdersEquityNonVestedOptionsDetails</Role>
      <ShortName>Stockholders' Equity - Non-Vested Options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>99940706 - Disclosure - Stockholders' Equity - Stock Awards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureStockholdersEquityStockAwardsDetails</Role>
      <ShortName>Stockholders' Equity - Stock Awards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>99940707 - Disclosure - Stockholders' Equity - Restricted Stock Units (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureStockholdersEquityRestrictedStockUnitsDetails</Role>
      <ShortName>Stockholders' Equity - Restricted Stock Units (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>99940708 - Disclosure - Stockholders' Equity - Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureStockholdersEquityWarrantsDetails</Role>
      <ShortName>Stockholders' Equity - Warrants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>99940801 - Disclosure - Earnings (Loss) Per Share - Basic and Diluted Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureEarningsLossPerShareBasicAndDilutedEarningsPerShareDetails</Role>
      <ShortName>Earnings (Loss) Per Share - Basic and Diluted Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.xcelbrands.com/role/DisclosureEarningsLossPerShareTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>99940802 - Disclosure - Earnings (Loss) Per Share - Anti-dilutive Securities Excluded (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureEarningsLossPerShareAntiDilutiveSecuritiesExcludedDetails</Role>
      <ShortName>Earnings (Loss) Per Share - Anti-dilutive Securities Excluded (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.xcelbrands.com/role/DisclosureEarningsLossPerShareTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>99940901 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureIncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.xcelbrands.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>99941001 - Disclosure - Related Party Transactions - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureRelatedPartyTransactionsNarrativeDetails</Role>
      <ShortName>Related Party Transactions - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>99941101 - Disclosure - Commitments and Contingencies - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureCommitmentsAndContingenciesNarrativeDetails</Role>
      <ShortName>Commitments and Contingencies - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="xelb-20260630x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>99941201 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xcelbrands.com/role/DisclosureSubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.xcelbrands.com/role/DisclosureSubsequentEvents</ParentRole>
      <Position>53</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>xelb-20260630.xsd</File>
    <File>xelb-20260630_cal.xml</File>
    <File>xelb-20260630_def.xml</File>
    <File>xelb-20260630_lab.xml</File>
    <File>xelb-20260630_pre.xml</File>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="xelb-20260630x10q.htm">xelb-20260630x10q.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="608">http://fasb.org/us-gaap/2026</BaseTaxonomy>
    <BaseTaxonomy items="29">http://xbrl.sec.gov/dei/2026</BaseTaxonomy>
    <BaseTaxonomy items="4">http://xbrl.sec.gov/ecd/2026</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
