<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.3</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>106</ContextCount>
  <ElementCount>250</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>36</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>75000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>75010 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/StatementConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>75020 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>75030 - Statement - Consolidated Statements of Operations Unaudited</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/StatementConsolidatedStatementsOfOperationsUnaudited</Role>
      <ShortName>Consolidated Statements of Operations Unaudited</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>75040 - Statement - Consolidated Statement of Changes in Stockholders' Deficit Unaudited</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/StatementConsolidatedStatementOfChangesInStockholdersDeficitUnaudited</Role>
      <ShortName>Consolidated Statement of Changes in Stockholders' Deficit Unaudited</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>75050 - Statement - Consolidated Statements of Cash Flows Unaudited</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/StatementConsolidatedStatementsOfCashFlowsUnaudited</Role>
      <ShortName>Consolidated Statements of Cash Flows Unaudited</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>75060 - Disclosure - Organization</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureOrganization</Role>
      <ShortName>Organization</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>75070 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>75080 - Disclosure - Accrued Liabilities and Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureAccruedLiabilitiesAndCompensation</Role>
      <ShortName>Accrued Liabilities and Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>75090 - Disclosure - Convertible Instruments and Accrued Interest</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureConvertibleInstrumentsAndAccruedInterest</Role>
      <ShortName>Convertible Instruments and Accrued Interest</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>75100 - Disclosure - Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureEquity</Role>
      <ShortName>Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>75110 - Disclosure - Equity Incentive Plan</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureEquityIncentivePlan</Role>
      <ShortName>Equity Incentive Plan</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>75120 - Disclosure - Loss per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureLossPerShare</Role>
      <ShortName>Loss per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>75130 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>75140 - Disclosure - Fair Value Measurement</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureFairValueMeasurement</Role>
      <ShortName>Fair Value Measurement</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>75150 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>75160 - Disclosure - Segment Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSegmentInformation</Role>
      <ShortName>Segment Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>75170 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>75180 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>19</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>75190 - Disclosure - Accrued Liabilities and Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureAccruedLiabilitiesAndCompensationTables</Role>
      <ShortName>Accrued Liabilities and Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureAccruedLiabilitiesAndCompensation</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>75200 - Disclosure - Convertible Instruments and Accrued Interest (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureConvertibleInstrumentsAndAccruedInterestTables</Role>
      <ShortName>Convertible Instruments and Accrued Interest (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureConvertibleInstrumentsAndAccruedInterest</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>75210 - Disclosure - Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureEquityTables</Role>
      <ShortName>Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureEquity</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>75220 - Disclosure - Equity Incentive Plan (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureEquityIncentivePlanTables</Role>
      <ShortName>Equity Incentive Plan (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureEquityIncentivePlan</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>75230 - Disclosure - Loss per Share (Table)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureLossPerShareTable</Role>
      <ShortName>Loss per Share (Table)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureLossPerShare</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>75240 - Disclosure - Fair Value Measurement (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureFairValueMeasurementTables</Role>
      <ShortName>Fair Value Measurement (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureFairValueMeasurement</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>75250 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureCommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>75260 - Disclosure - Segment Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSegmentInformationTables</Role>
      <ShortName>Segment Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSegmentInformation</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>75270 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>75290 - Disclosure - Accrued Liabilities and Compensation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureAccruedLiabilitiesAndCompensationDetails</Role>
      <ShortName>Accrued Liabilities and Compensation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureAccruedLiabilitiesAndCompensationTables</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>75300 - Disclosure - Convertible Instruments and Accrued Interest - Preferred stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureConvertibleInstrumentsAndAccruedInterestPreferredStockDetails</Role>
      <ShortName>Convertible Instruments and Accrued Interest - Preferred stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>75310 - Disclosure - Convertible Instruments and Accrued Interest - Outstanding Balance (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureConvertibleInstrumentsAndAccruedInterestOutstandingBalanceDetails</Role>
      <ShortName>Convertible Instruments and Accrued Interest - Outstanding Balance (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>75320 - Disclosure - Convertible Instruments and Accrued Interest - Components (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureConvertibleInstrumentsAndAccruedInterestComponentsDetails</Role>
      <ShortName>Convertible Instruments and Accrued Interest - Components (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>75330 - Disclosure - Convertible Instruments and Accrued Interest - Convertible Note - April 2, 2021 &amp; April 23, 2021 Note (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureConvertibleInstrumentsAndAccruedInterestConvertibleNoteApril22021April232021NoteDetails</Role>
      <ShortName>Convertible Instruments and Accrued Interest - Convertible Note - April 2, 2021 &amp; April 23, 2021 Note (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>75340 - Disclosure - Equity - Private placement of common stock and warrants through placement agent (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureEquityPrivatePlacementOfCommonStockAndWarrantsThroughPlacementAgentDetails</Role>
      <ShortName>Equity - Private placement of common stock and warrants through placement agent (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>75350 - Disclosure - Equity - Direct Private Sales of Common Stock and Warrants to Accredited Investors (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureEquityDirectPrivateSalesOfCommonStockAndWarrantsToAccreditedInvestorsDetails</Role>
      <ShortName>Equity - Direct Private Sales of Common Stock and Warrants to Accredited Investors (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>75360 - Disclosure - Equity - Warrant activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureEquityWarrantActivityDetails</Role>
      <ShortName>Equity - Warrant activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>75390 - Disclosure - Equity Incentive Plan (Additional Information) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureEquityIncentivePlanAdditionalInformationDetails</Role>
      <ShortName>Equity Incentive Plan (Additional Information) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureEquityIncentivePlanTables</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>75410 - Disclosure - Equity Incentive Plan - Stock options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureEquityIncentivePlanStockOptionsDetails</Role>
      <ShortName>Equity Incentive Plan - Stock options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>75420 - Disclosure - Equity Incentive Plan - Schedule of Company's PSU activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureEquityIncentivePlanScheduleOfCompanysPsuActivityDetails</Role>
      <ShortName>Equity Incentive Plan - Schedule of Company's PSU activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>75430 - Disclosure - Equity Incentive Plan - Schedule of Company's PSU activity (Parenthetical) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureEquityIncentivePlanScheduleOfCompanysPsuActivityParentheticalDetails</Role>
      <ShortName>Equity Incentive Plan - Schedule of Company's PSU activity (Parenthetical) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>75440 - Disclosure - Loss per Share - Summary of Reconciliation of Loss per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureLossPerShareSummaryOfReconciliationOfLossPerShareDetails</Role>
      <ShortName>Loss per Share - Summary of Reconciliation of Loss per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>75450 - Disclosure - Loss per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureLossPerShareDetails</Role>
      <ShortName>Loss per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureLossPerShareTable</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>75460 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureIncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureIncomeTaxes</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>75470 - Disclosure - Fair Value Measurement (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureFairValueMeasurementDetails</Role>
      <ShortName>Fair Value Measurement (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureFairValueMeasurementTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>75480 - Disclosure - Commitments and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureCommitmentsAndContingenciesDetails</Role>
      <ShortName>Commitments and Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureCommitmentsAndContingenciesTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>75490 - Disclosure - Commitments and Contingencies - Summary of Operating Lease Balances (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureCommitmentsAndContingenciesSummaryOfOperatingLeaseBalancesDetails</Role>
      <ShortName>Commitments and Contingencies - Summary of Operating Lease Balances (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>75500 - Disclosure - Commitments and Contingencies - Summary of Minimum (Base Rental) Lease Payments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureCommitmentsAndContingenciesSummaryOfMinimumBaseRentalLeasePaymentsDetails</Role>
      <ShortName>Commitments and Contingencies - Summary of Minimum (Base Rental) Lease Payments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>75520 - Disclosure - Commitments and Contingencies - Supplemental Information Related to Operating Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureCommitmentsAndContingenciesSupplementalInformationRelatedToOperatingLeasesDetails</Role>
      <ShortName>Commitments and Contingencies - Supplemental Information Related to Operating Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>75530 - Disclosure - Segment Information (Additional Information) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSegmentInformationAdditionalInformationDetails</Role>
      <ShortName>Segment Information (Additional Information) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSegmentInformationTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>75540 - Disclosure - Segment Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSegmentInformationDetails</Role>
      <ShortName>Segment Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSegmentInformationTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>75550 - Disclosure - Segment Information - Schedule of reconciliation to the consolidated net income (loss) (Parenthetical) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSegmentInformationScheduleOfReconciliationToTheConsolidatedNetIncomeLossParentheticalDetails</Role>
      <ShortName>Segment Information - Schedule of reconciliation to the consolidated net income (loss) (Parenthetical) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="ck0001175680-20260831.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>75560 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.cytodyn.com/20260831/taxonomy/role/DisclosureSubsequentEvents</ParentRole>
      <Position>52</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="ck0001175680-20260831.htm">ck0001175680-20260831.htm</File>
    <File>ck0001175680-20260831.xsd</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="421">http://fasb.org/us-gaap/2026</BaseTaxonomy>
    <BaseTaxonomy items="29">http://xbrl.sec.gov/dei/2026</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>false</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
