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v3.21.1

Borrowings - Milestone Rights - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020
Debt Disclosure [Abstract] |  |  |
Remaining milestone rights liability |  | $ 7,300 | $ 7,300
Payment for milestone liability | $ 5,000 |  |
Milestone rights liability — current | 1,337 | 1,337 |
Milestone rights liability | $ 5,926 | $ 5,926 |

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

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

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- Definition Milestone rights liabilities noncurrent. + References No definition available. + Details
Name: | mnkd_MilestoneRightsLiabilitiesNoncurrent
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

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