Annual report pursuant to Section 13 and 15(d) 12-31-2014

Property and Equipment - Components of Property and Equipment (Details)

v2.4.1.9
Property and Equipment - Components of Property and Equipment (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Property Plant And Equipment [Line Items]    
Property and equipment gross $ 18,556us-gaap_PropertyPlantAndEquipmentGross $ 17,751us-gaap_PropertyPlantAndEquipmentGross
Less: accumulated depreciation and amortization (15,041)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (14,220)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property and equipment, net 3,515us-gaap_PropertyPlantAndEquipmentNet 3,531us-gaap_PropertyPlantAndEquipmentNet
Manufacturing and lab equipment    
Property Plant And Equipment [Line Items]    
Property and equipment gross 7,427us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
7,163us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
Surgical instruments    
Property Plant And Equipment [Line Items]    
Property and equipment gross 8,217us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= amda_SurgicalInstrumentsMember
7,721us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= amda_SurgicalInstrumentsMember
Leasehold improvements    
Property Plant And Equipment [Line Items]    
Property and equipment gross 1,439us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember
1,439us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember
Software and computer equipment    
Property Plant And Equipment [Line Items]    
Property and equipment gross 845us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerEquipmentMember
807us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerEquipmentMember
Furniture and equipment    
Property Plant And Equipment [Line Items]    
Property and equipment gross $ 628us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember
$ 621us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember