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Schedule of Lease payments to the Mann foundation (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Mann Foundation | Sublease Agreement |  |  |  |
Lease And Rental Expense [Line Items] |  |  |  |
Lease payments | $ 40 | $ 67 | $ 161 | $ 200

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- Definition Lease and rental expense. + References No definition available. + Details
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Namespace Prefix: | mnkd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Office lease expense. + References No definition available. + Details
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Namespace Prefix: | mnkd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RelatedPartyTransactionAxis=mnkd_SubleaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |