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Property and Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Property and equipment - gross $ 314,000us-gaap_PropertyPlantAndEquipmentGross $ 310,348us-gaap_PropertyPlantAndEquipmentGross
Less accumulated depreciation and amortization (120,546)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (118,221)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property and equipment - net 193,454us-gaap_PropertyPlantAndEquipmentNet 192,127us-gaap_PropertyPlantAndEquipmentNet
Land    
Property, Plant and Equipment [Line Items]    
Property and equipment - gross 5,273us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
5,273us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
Buildings    
Property, Plant and Equipment [Line Items]    
Property and equipment - gross 54,948us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
54,948us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
Buildings | Minimum    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 39 years  
Buildings | Maximum    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 40 years  
Building Improvements    
Property, Plant and Equipment [Line Items]    
Property and equipment - gross 114,131us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingImprovementsMember
114,131us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingImprovementsMember
Building Improvements | Minimum    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 5 years  
Building Improvements | Maximum    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 40 years  
Machinery and Equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment - gross 82,120us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
80,919us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
Machinery and Equipment | Minimum    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 3 years  
Machinery and Equipment | Maximum    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 15 years  
Furniture, fixtures and office equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment - gross 5,015us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= mnkd_FurnitureFixturesAndOfficeEquipmentMember
5,015us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= mnkd_FurnitureFixturesAndOfficeEquipmentMember
Furniture, fixtures and office equipment | Minimum    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 5 years  
Furniture, fixtures and office equipment | Maximum    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 10 years  
Computer Equipment and Software    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 3 years  
Property and equipment - gross 10,499us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= mnkd_ComputerEquipmentAndSoftwareMember
10,465us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= mnkd_ComputerEquipmentAndSoftwareMember
Leasehold Improvements    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life (Years) 4 years  
Property and equipment - gross 17us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember
17us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember
Construction in Progress    
Property, Plant and Equipment [Line Items]    
Property and equipment - gross $ 41,997us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember
$ 39,580us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember