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Borrowings - Additional Information (Detail) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
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Debt Disclosure [Abstract] |  |
Accrued interest owed to related party, to be capitalized and paid in kind | $ 9,132 | $ 6,835

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- Definition Accrued interest noncurrent. + References No definition available. + Details
Name: | mnkd_AccruedInterestNoncurrent
Namespace Prefix: | mnkd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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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