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Borrowings - Milestone Rights - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2021
Debt Disclosure [Abstract] |  |
Remaining milestone rights liability | $ 7.3 | $ 5.9
Payment for milestone liability | $ 5.0 |
Milestone rights liability, current |  | $ 1.3

X
- Definition Milestone rights liabilities current and noncurrent. + References No definition available. + Details
Name: | mnkd_MilestoneRightsLiabilitiesCurrentAndNoncurrent
Namespace Prefix: | mnkd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Milestone rights liability current. + References No definition available. + Details
Name: | mnkd_MilestoneRightsLiabilityCurrent
Namespace Prefix: | mnkd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Payment for milestone rights liabilities. + References No definition available. + Details
Name: | mnkd_PaymentForMilestoneRightsLiabilities
Namespace Prefix: | mnkd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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