<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>108</ContextCount>
  <ElementCount>195</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>34</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>5</UnitCount>
  <MyReports>
    <Report instance="tmb-20260331x10q.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.mustangbio.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>995200100 - Statement - Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/StatementBalanceSheets</Role>
      <ShortName>Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>995200105 - Statement - Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/StatementBalanceSheetsParenthetical</Role>
      <ShortName>Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>995200200 - Statement - Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/StatementStatementsOfOperations</Role>
      <ShortName>Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>995200300 - Statement - Statements of Stockholders' Equity (Deficit)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/StatementStatementsOfStockholdersEquityDeficit</Role>
      <ShortName>Statements of Stockholders' Equity (Deficit)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>995200305 - Statement - Statements of Stockholders' Equity (Deficit) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/StatementStatementsOfStockholdersEquityDeficitParenthetical</Role>
      <ShortName>Statements of Stockholders' Equity (Deficit) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>995200400 - Statement - Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/StatementStatementsOfCashFlows</Role>
      <ShortName>Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>995210101 - Disclosure - Organization, Description of Business and Liquidity and Capital Resources</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureOrganizationDescriptionOfBusinessAndLiquidityAndCapitalResources</Role>
      <ShortName>Organization, Description of Business and Liquidity and Capital Resources</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>995210201 - Disclosure - Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureSignificantAccountingPolicies</Role>
      <ShortName>Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995210301 - Disclosure - Related Party Agreements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureRelatedPartyAgreements</Role>
      <ShortName>Related Party Agreements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995210401 - Disclosure - Accounts Payable and Accrued Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureAccountsPayableAndAccruedExpenses</Role>
      <ShortName>Accounts Payable and Accrued Expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995210501 - Disclosure - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureStockholdersEquity</Role>
      <ShortName>Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995210601 - Disclosure - Net Loss per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureNetLossPerShare</Role>
      <ShortName>Net Loss per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995210701 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995210801 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995210901 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureSubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.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>17</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.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>18</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>99920202 - Disclosure - Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureSignificantAccountingPolicies</ParentRole>
      <Position>19</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>99930403 - Disclosure - Accounts Payable and Accrued Expenses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureAccountsPayableAndAccruedExpensesTables</Role>
      <ShortName>Accounts Payable and Accrued Expenses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureAccountsPayableAndAccruedExpenses</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>99930503 - Disclosure - Stockholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureStockholdersEquityTables</Role>
      <ShortName>Stockholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureStockholdersEquity</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>99930603 - Disclosure - Net Loss per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureNetLossPerShareTables</Role>
      <ShortName>Net Loss per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureNetLossPerShare</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>99940101 - Disclosure - Organization, Description of Business and Liquidity and Capital Resources (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureOrganizationDescriptionOfBusinessAndLiquidityAndCapitalResourcesDetails</Role>
      <ShortName>Organization, Description of Business and Liquidity and Capital Resources (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureOrganizationDescriptionOfBusinessAndLiquidityAndCapitalResources</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>99940201 - Disclosure - Significant Accounting Policies (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureSignificantAccountingPoliciesNarrativeDetails</Role>
      <ShortName>Significant Accounting Policies (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>99940301 - Disclosure - Related Party Agreements (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureRelatedPartyAgreementsNarrativeDetails</Role>
      <ShortName>Related Party Agreements (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureRelatedPartyAgreements</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>99940401 - Disclosure - Accounts Payable and Accrued Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureAccountsPayableAndAccruedExpensesDetails</Role>
      <ShortName>Accounts Payable and Accrued Expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureAccountsPayableAndAccruedExpensesTables</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>99940402 - Disclosure - Accounts Payable and Accrued Expenses - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureAccountsPayableAndAccruedExpensesAdditionalInformationDetails</Role>
      <ShortName>Accounts Payable and Accrued Expenses - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>99940501 - Disclosure - Stockholders' Equity (Registration Statements) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureStockholdersEquityRegistrationStatementsDetails</Role>
      <ShortName>Stockholders' Equity (Registration Statements) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureStockholdersEquityTables</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>99940502 - Disclosure - Stockholders' Equity (February 2025 Equity Offering) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureStockholdersEquityFebruary2025EquityOfferingDetails</Role>
      <ShortName>Stockholders' Equity (February 2025 Equity Offering) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureStockholdersEquityTables</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>99940503 - Disclosure - Stockholders' Equity (At-the-Market Offering of Common Stock) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureStockholdersEquityAtMarketOfferingOfCommonStockDetails</Role>
      <ShortName>Stockholders' Equity (At-the-Market Offering of Common Stock) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureStockholdersEquityTables</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>99940504 - Disclosure - Stockholders' Equity (Induced Warrant Exercise and Stock Warrants) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureStockholdersEquityInducedWarrantExerciseAndStockWarrantsDetails</Role>
      <ShortName>Stockholders' Equity (Induced Warrant Exercise and Stock Warrants) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureStockholdersEquityTables</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>99940505 - Disclosure - Stockholders' Equity (Equity Incentive Plans and Employee Stock Purchase Plan) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureStockholdersEquityEquityIncentivePlansAndEmployeeStockPurchasePlanDetails</Role>
      <ShortName>Stockholders' Equity (Equity Incentive Plans and Employee Stock Purchase Plan) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureStockholdersEquityTables</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>99940506 - Disclosure - Stockholders' Equity (Stock Option Activities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureStockholdersEquityStockOptionActivitiesDetails</Role>
      <ShortName>Stockholders' Equity (Stock Option Activities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureStockholdersEquityTables</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>99940507 - Disclosure - Stockholders' Equity (Restricted Stock Awards and Units) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureStockholdersEquityRestrictedStockAwardsAndUnitsDetails</Role>
      <ShortName>Stockholders' Equity (Restricted Stock Awards and Units) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureStockholdersEquityTables</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>99940508 - Disclosure - Stockholders' Equity (Stock-based Compensation Expense) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureStockholdersEquityStockBasedCompensationExpenseDetails</Role>
      <ShortName>Stockholders' Equity (Stock-based Compensation Expense) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureStockholdersEquityTables</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>99940601 - Disclosure - Net Loss per Share (Potentially Dilutive Securities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureNetLossPerSharePotentiallyDilutiveSecuritiesDetails</Role>
      <ShortName>Net Loss per Share (Potentially Dilutive Securities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureNetLossPerShareTables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>99940602 - Disclosure - Net Loss per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureNetLossPerShareDetails</Role>
      <ShortName>Net Loss per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureNetLossPerShareTables</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="tmb-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>99940801 - Disclosure - Commitments and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mustangbio.com/role/DisclosureCommitmentsAndContingenciesDetails</Role>
      <ShortName>Commitments and Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mustangbio.com/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>38</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-20260331.xsd</File>
    <File>tmb-20260331_cal.xml</File>
    <File>tmb-20260331_def.xml</File>
    <File>tmb-20260331_lab.xml</File>
    <File>tmb-20260331_pre.xml</File>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="tmb-20260331x10q.htm">tmb-20260331x10q.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="268">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="30">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>
