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

Milestone rights liabilities current and noncurrent.

No definition available.

Name:	mnkd_MilestoneRightsLiabilitiesCurrentAndNoncurrent
Namespace Prefix:	mnkd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant