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v3.19.2

Subsequent Event - Amphastar Amendment - Additional Information (Detail) - USD ($) $ in Thousands | Dec. 15, 2019 | Sep. 15, 2019 | Jul. 18, 2019
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Scenario Forecast |  |  |
Subsequent Event [Line Items] |  |  |
Purchase commitments, amendment fees | $ 1,250 | $ 1,500 |
Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Purchase obligation extended term |  |  | 2 years

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- Definition Long-term purchase commitment amendment fee. + References No definition available. + Details
Name: | mnkd_LongTermPurchaseCommitmentAmendmentFee
Namespace Prefix: | mnkd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Purchase obligation extended term. + References No definition available. + Details
Name: | mnkd_PurchaseObligationExtendedTerm
Namespace Prefix: | mnkd_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |