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Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Dec. 31, 2017
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plans	15. Employee Benefit Plans The Company administers a 401(k) savings retirement plan (the “MannKind Retirement Plan”) for its employees. For the years ended December 31, 2017, 2016 and 2015, the Company contributed $0.4 million, $0.4 million and $0.6 million, respectively, to the MannKind Retirement Plan.