<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>297</ContextCount>
  <ElementCount>419</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>111</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>11</UnitCount>
  <MyReports>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>100000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>100010 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/StatementCondensedConsolidatedBalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>100020 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/StatementCondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>100030 - Statement - Condensed Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfOperations</Role>
      <ShortName>Condensed Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>100040 - Statement - Condensed Consolidated Statements of Comprehensive Loss</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfComprehensiveLoss</Role>
      <ShortName>Condensed Consolidated Statements of Comprehensive Loss</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>100050 - Statement - Condensed Consolidated Statements of Stockholders' Deficit</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfStockholdersDeficit</Role>
      <ShortName>Condensed Consolidated Statements of Stockholders' Deficit</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>100060 - Statement - Condensed Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>100070 - Disclosure - Description of Business and Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureDescriptionOfBusinessAndSignificantAccountingPolicies</Role>
      <ShortName>Description of Business and Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>100080 - Disclosure - Investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureInvestments</Role>
      <ShortName>Investments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>100090 - Disclosure - Accounts Receivable</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureAccountsReceivable</Role>
      <ShortName>Accounts Receivable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>100100 - Disclosure - Inventories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureInventories</Role>
      <ShortName>Inventories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>100110 - Disclosure - Property and Equipment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosurePropertyAndEquipment</Role>
      <ShortName>Property and Equipment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>100120 - Disclosure - Accrued Expenses and Other Current Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilities</Role>
      <ShortName>Accrued Expenses and Other Current Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>100130 - Disclosure - Borrowings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureBorrowings</Role>
      <ShortName>Borrowings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>100140 - Disclosure - Collaboration, Licensing and Other Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCollaborationLicensingAndOtherArrangements</Role>
      <ShortName>Collaboration, Licensing and Other Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>100150 - Disclosure - Fair Value of Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureFairValueOfFinancialInstruments</Role>
      <ShortName>Fair Value of Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>100160 - Disclosure - Common and Preferred Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCommonAndPreferredStock</Role>
      <ShortName>Common and Preferred Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>100170 - Disclosure - Earnings Per Common Share ("EPS")</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureEarningsPerCommonShareEPS</Role>
      <ShortName>Earnings Per Common Share ("EPS")</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>100180 - Disclosure - Stock-Based Compensation Expense</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureStockBasedCompensationExpense</Role>
      <ShortName>Stock-Based Compensation Expense</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>100190 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>100200 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>100210 - Disclosure - Description of Business and Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureDescriptionOfBusinessAndSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Description of Business and Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureDescriptionOfBusinessAndSignificantAccountingPolicies</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>100220 - Disclosure - Description of Business and Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureDescriptionOfBusinessAndSignificantAccountingPoliciesTables</Role>
      <ShortName>Description of Business and Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureDescriptionOfBusinessAndSignificantAccountingPolicies</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>100230 - Disclosure - Investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureInvestmentsTables</Role>
      <ShortName>Investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureInvestments</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>100240 - Disclosure - Accounts Receivable (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureAccountsReceivableTables</Role>
      <ShortName>Accounts Receivable (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureAccountsReceivable</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>100250 - Disclosure - Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureInventoriesTables</Role>
      <ShortName>Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureInventories</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>100260 - Disclosure - Property and Equipment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosurePropertyAndEquipmentTables</Role>
      <ShortName>Property and Equipment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosurePropertyAndEquipment</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>100270 - Disclosure - Accrued Expenses and Other Current Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesTables</Role>
      <ShortName>Accrued Expenses and Other Current Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilities</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>100280 - Disclosure - Borrowings (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureBorrowingsTables</Role>
      <ShortName>Borrowings (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureBorrowings</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>100290 - Disclosure - Collaboration, Licensing and Other Arrangements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCollaborationLicensingAndOtherArrangementsTables</Role>
      <ShortName>Collaboration, Licensing and Other Arrangements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCollaborationLicensingAndOtherArrangements</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>100300 - Disclosure - Fair Value of Financial Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsTables</Role>
      <ShortName>Fair Value of Financial Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureFairValueOfFinancialInstruments</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>100310 - Disclosure - Earnings Per Common Share ("EPS") (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureEarningsPerCommonShareEPSTables</Role>
      <ShortName>Earnings Per Common Share ("EPS") (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureEarningsPerCommonShareEPS</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>100320 - Disclosure - Stock-Based Compensation Expense (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureStockBasedCompensationExpenseTables</Role>
      <ShortName>Stock-Based Compensation Expense (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureStockBasedCompensationExpense</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>100330 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>100340 - Disclosure - Description of Business and Significant Accounting Policies - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureDescriptionOfBusinessAndSignificantAccountingPoliciesAdditionalInformationDetail</Role>
      <ShortName>Description of Business and Significant Accounting Policies - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>100350 - Disclosure - Description of Business and Significant Accounting Policies - Additional Information (Detail 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureDescriptionOfBusinessAndSignificantAccountingPoliciesAdditionalInformationDetail1</Role>
      <ShortName>Description of Business and Significant Accounting Policies - Additional Information (Detail 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>100360 - Disclosure - Schedule of Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureScheduleOfReconciliationOfCashCashEquivalentsAndRestrictedCashDetail</Role>
      <ShortName>Schedule of Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>100370 - Disclosure - Investments - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureInvestmentsAdditionalInformationDetail</Role>
      <ShortName>Investments - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>100380 - Disclosure - Investments - Schedule of Fair Value of Cash Equivalents, Long and Short Term Investments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureInvestmentsScheduleOfFairValueOfCashEquivalentsLongAndShortTermInvestmentsDetail</Role>
      <ShortName>Investments - Schedule of Fair Value of Cash Equivalents, Long and Short Term Investments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>100390 - Disclosure - Schedule of Accounts Receivable, Net (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureScheduleOfAccountsReceivableNetDetail</Role>
      <ShortName>Schedule of Accounts Receivable, Net (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>100410 - Disclosure - Accounts Receivable - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureAccountsReceivableAdditionalInformationDetail</Role>
      <ShortName>Accounts Receivable - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>100420 - Disclosure - Inventories - Components of Inventory (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureInventoriesComponentsOfInventoryDetail</Role>
      <ShortName>Inventories - Components of Inventory (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>100430 - Disclosure - Inventories - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureInventoriesAdditionalInformationDetail</Role>
      <ShortName>Inventories - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>100440 - Disclosure - Property and Equipment, Net (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosurePropertyAndEquipmentNetDetail</Role>
      <ShortName>Property and Equipment, Net (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosurePropertyAndEquipmentTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>100450 - Disclosure - Property and Equipment, Net (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosurePropertyAndEquipmentNetParentheticalDetail</Role>
      <ShortName>Property and Equipment, Net (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosurePropertyAndEquipmentTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>100460 - Disclosure - Depreciation Expense Related to Property and Equipment (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureDepreciationExpenseRelatedToPropertyAndEquipmentDetail</Role>
      <ShortName>Depreciation Expense Related to Property and Equipment (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>100470 - Disclosure - Property and Equipment - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosurePropertyAndEquipmentAdditionalInformationDetail</Role>
      <ShortName>Property and Equipment - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>100480 - Disclosure - Accrued Expenses and Other Current Liabilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesDetail</Role>
      <ShortName>Accrued Expenses and Other Current Liabilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>100490 - Disclosure - Borrowings - Summary of Carrying Amount of Principal Borrowings (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureBorrowingsSummaryOfCarryingAmountOfPrincipalBorrowingsDetail</Role>
      <ShortName>Borrowings - Summary of Carrying Amount of Principal Borrowings (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>100500 - Disclosure - Borrowings - Schedule of Line of Credit Facility Debt and Key Terms (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureBorrowingsScheduleOfLineOfCreditFacilityDebtAndKeyTermsDetail</Role>
      <ShortName>Borrowings - Schedule of Line of Credit Facility Debt and Key Terms (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>100510 - Disclosure - Borrowings - Schedule of Line of Credit Facility Debt and Key Terms (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureBorrowingsScheduleOfLineOfCreditFacilityDebtAndKeyTermsParentheticalDetail</Role>
      <ShortName>Borrowings - Schedule of Line of Credit Facility Debt and Key Terms (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>100520 - Disclosure - Borrowings - Schedule of Maturities of Our Borrowings (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureBorrowingsScheduleOfMaturitiesOfOurBorrowingsDetail</Role>
      <ShortName>Borrowings - Schedule of Maturities of Our Borrowings (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>100530 - Disclosure - Borrowings - Senior Convertible Notes - Additional Information (Detail)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureBorrowingsSeniorConvertibleNotesAdditionalInformationDetail</Role>
      <ShortName>Borrowings - Senior Convertible Notes - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>100540 - Disclosure - Borrowings - MidCap Credit Facility - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureBorrowingsMidcapCreditFacilityAdditionalInformationDetail</Role>
      <ShortName>Borrowings - MidCap Credit Facility - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>100550 - Disclosure - Borrowings - Mann Group Promissory Notes - Additional Information (Detail)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureBorrowingsMannGroupPromissoryNotesAdditionalInformationDetail</Role>
      <ShortName>Borrowings - Mann Group Promissory Notes - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>100560 - Disclosure - Borrowings - Schedule of Amortization of Debt Premium and Accretion of Debt Discount and Debt Issuance Cost (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureBorrowingsScheduleOfAmortizationOfDebtPremiumAndAccretionOfDebtDiscountAndDebtIssuanceCostDetail</Role>
      <ShortName>Borrowings - Schedule of Amortization of Debt Premium and Accretion of Debt Discount and Debt Issuance Cost (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>100570 - Disclosure - Borrowings - Milestone Rights - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureBorrowingsMilestoneRightsAdditionalInformationDetail</Role>
      <ShortName>Borrowings - Milestone Rights - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>100580 - Disclosure - Schedule of Revenue from Collaborations and Services (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureScheduleOfRevenueFromCollaborationsAndServicesDetail</Role>
      <ShortName>Schedule of Revenue from Collaborations and Services (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>100590 - Disclosure - Collaboration, Licensing and Other Arrangements - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCollaborationLicensingAndOtherArrangementsAdditionalInformationDetail</Role>
      <ShortName>Collaboration, Licensing and Other Arrangements - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>100600 - Disclosure - Collaboration, Licensing and Other Arrangements - Schedule of Effect of Modification on Transaction Price (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCollaborationLicensingAndOtherArrangementsScheduleOfEffectOfModificationOnTransactionPriceDetail</Role>
      <ShortName>Collaboration, Licensing and Other Arrangements - Schedule of Effect of Modification on Transaction Price (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>100610 - Disclosure - Collaboration, Licensing and Other Arrangements - Additional Information (Detail 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCollaborationLicensingAndOtherArrangementsAdditionalInformationDetail1</Role>
      <ShortName>Collaboration, Licensing and Other Arrangements - Additional Information (Detail 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>100620 - Disclosure - Fair Value of Financial Instruments - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsAdditionalInformationDetail</Role>
      <ShortName>Fair Value of Financial Instruments - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>100630 - Disclosure - Fair Value of Financial Instruments - Fair Value of Financial Instruments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsFairValueOfFinancialInstrumentsDetail</Role>
      <ShortName>Fair Value of Financial Instruments - Fair Value of Financial Instruments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>100640 - Disclosure - Fair Value of Financial Instruments - Fair Value of Financial Instruments (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsFairValueOfFinancialInstrumentsParentheticalDetail</Role>
      <ShortName>Fair Value of Financial Instruments - Fair Value of Financial Instruments (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>100650 - Disclosure - Common and Preferred Stock - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCommonAndPreferredStockAdditionalInformationDetail</Role>
      <ShortName>Common and Preferred Stock - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>100660 - Disclosure - Earnings Per Common Share ("EPS") - Components of Basic and Diluted EPS Computations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureEarningsPerCommonShareEPSComponentsOfBasicAndDilutedEPSComputationsDetail</Role>
      <ShortName>Earnings Per Common Share ("EPS") - Components of Basic and Diluted EPS Computations (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureEarningsPerCommonShareEPSTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>100670 - Disclosure - Earnings Per Common Share ("EPS") - Potential Dilutive Securities Outstanding that are Considered Antidilutive (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureEarningsPerCommonShareEPSPotentialDilutiveSecuritiesOutstandingThatAreConsideredAntidilutiveDetail</Role>
      <ShortName>Earnings Per Common Share ("EPS") - Potential Dilutive Securities Outstanding that are Considered Antidilutive (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureEarningsPerCommonShareEPSTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>100680 - Disclosure - Earnings Per Common Share ("EPS") - Potential Dilutive Securities Outstanding that are Considered Antidilutive (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureEarningsPerCommonShareEPSPotentialDilutiveSecuritiesOutstandingThatAreConsideredAntidilutiveParentheticalDetail</Role>
      <ShortName>Earnings Per Common Share ("EPS") - Potential Dilutive Securities Outstanding that are Considered Antidilutive (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureEarningsPerCommonShareEPSTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>100690 - Disclosure - Stock-Based Compensation - Schedule of Employee Awards and Non-employee Director Award Plan Activity (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureStockBasedCompensationScheduleOfEmployeeAwardsAndNonEmployeeDirectorAwardPlanActivityDetail</Role>
      <ShortName>Stock-Based Compensation - Schedule of Employee Awards and Non-employee Director Award Plan Activity (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>100700 - Disclosure - Stock-Based Compensation - Schedule of Employee Awards and Non-employee Director Award Plan Activity (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureStockBasedCompensationScheduleOfEmployeeAwardsAndNonEmployeeDirectorAwardPlanActivityParentheticalDetail</Role>
      <ShortName>Stock-Based Compensation - Schedule of Employee Awards and Non-employee Director Award Plan Activity (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>100710 - Disclosure - Stock-Based Compensation Expense - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureStockBasedCompensationExpenseAdditionalInformationDetail</Role>
      <ShortName>Stock-Based Compensation Expense - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>100720 - Disclosure - Stock-Based Compensation Expense - Stock Based Compensation Expense Recognized in Condensed Consolidated Statements of Operations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureStockBasedCompensationExpenseStockBasedCompensationExpenseRecognizedInCondensedConsolidatedStatementsOfOperationsDetail</Role>
      <ShortName>Stock-Based Compensation Expense - Stock Based Compensation Expense Recognized in Condensed Consolidated Statements of Operations (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>100730 - Disclosure - Commitments and Contingencies - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformationDetail</Role>
      <ShortName>Commitments and Contingencies - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>100740 - Disclosure - Commitments and Contingencies - Schedule of Financing Liability Lease Term and Discount Rate (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFinancingLiabilityLeaseTermAndDiscountRateDetail</Role>
      <ShortName>Commitments and Contingencies - Schedule of Financing Liability Lease Term and Discount Rate (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>100750 - Disclosure - Commitments and Contingencies - Summary of Financing Liability Costs (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCommitmentsAndContingenciesSummaryOfFinancingLiabilityCostsDetail</Role>
      <ShortName>Commitments and Contingencies - Summary of Financing Liability Costs (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>100760 - Disclosure - Commitments and Contingencies - Schedule of Financing Liability Payments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFinancingLiabilityPaymentsDetail</Role>
      <ShortName>Commitments and Contingencies - Schedule of Financing Liability Payments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>100780 - Disclosure - Commitments and Contingencies - Remaining Purchase Requirements (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCommitmentsAndContingenciesRemainingPurchaseRequirementsDetail</Role>
      <ShortName>Commitments and Contingencies - Remaining Purchase Requirements (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>100790 - Disclosure - Commitments and Contingencies - Summary of Lease Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCommitmentsAndContingenciesSummaryOfLeaseInformationDetail</Role>
      <ShortName>Commitments and Contingencies - Summary of Lease Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>100800 - Disclosure - Commitments and Contingencies - Schedule of Lease Term and Discount Rate (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfLeaseTermAndDiscountRateDetail</Role>
      <ShortName>Commitments and Contingencies - Schedule of Lease Term and Discount Rate (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>100810 - Disclosure - Commitments and Contingencies - Schedule of Future Minimum Office And Vehicle Lease Payments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumOfficeAndVehicleLeasePaymentsDetail</Role>
      <ShortName>Commitments and Contingencies - Schedule of Future Minimum Office And Vehicle Lease Payments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="mnkd-10q_20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>100820 - Disclosure - Income Taxes - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mannkindcorp.com/20220331/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail</Role>
      <ShortName>Income Taxes - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</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" original="mnkd-10q_20220331.htm">mnkd-10q_20220331.htm</File>
    <File>mnkd-20220331.xsd</File>
    <File>mnkd-20220331_cal.xml</File>
    <File>mnkd-20220331_def.xml</File>
    <File>mnkd-20220331_lab.xml</File>
    <File>mnkd-20220331_pre.xml</File>
    <File>mnkd-ex101_339.htm</File>
    <File>mnkd-ex311_10.htm</File>
    <File>mnkd-ex321_8.htm</File>
    <File>mnkd-ex322_7.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="676">http://fasb.org/us-gaap/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy items="29">http://xbrl.sec.gov/dei/2021q4</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
