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

X

- 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