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v3.21.1

Accrued Expenses and Other Current Liabilities - Additional Information (Detail) $ in Millions | Mar. 31, 2021 USD ($)
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Payables And Accruals [Abstract] |
Deferred social security taxes, CARES Act | $ 1.1

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- Definition Deferred social security taxes CARES act. + References No definition available. + Details
Name: | mnkd_DeferredSocialSecurityTaxesCARESAct
Namespace Prefix: | mnkd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_PayablesAndAccrualsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration