Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Details)

v2.4.1.9
Subsequent Events - Additional Information (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 0 Months Ended 1 Months Ended
Mar. 31, 2015
May 29, 2015
May 08, 2015
Apr. 02, 2015
Magna Convertible Notes        
Subsequent Event [Line Items]        
Convertible notes $ 202us-gaap_ConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
     
Common stock at a fixed conversion price $ 3.75us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
     
Threshold consecutive trading days 5 days      
Magna Convertible Notes, Alternate Conversion        
Subsequent Event [Line Items]        
Threshold consecutive trading days 5 days      
Secondary Offering Warrant        
Subsequent Event [Line Items]        
Warrants exercised 913,145amda_ClassofWarrantorRightWarrantsExercised
/ us-gaap_SubsidiarySaleOfStockAxis
= amda_SecondaryOfferingWarrantMember
     
Class of warrant outstanding 12,244,747us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_SubsidiarySaleOfStockAxis
= amda_SecondaryOfferingWarrantMember
     
Outstanding warrants exercisable 22,524,640us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_SubsidiarySaleOfStockAxis
= amda_SecondaryOfferingWarrantMember
     
Secondary Offering Warrant | Common Stock        
Subsequent Event [Line Items]        
Warrants converted into shares of common stock 1,717,840amda_StockIssuedDuringPeriodSharesWarrantsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= amda_SecondaryOfferingWarrantMember
     
Subsequent Event | Magna Convertible Notes        
Subsequent Event [Line Items]        
Outstanding warrants exercisable       568,889us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Exercise price of warrants       $ 4.65us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Convertible notes       $ 4,300us-gaap_ConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Common stock at a fixed conversion price       $ 1.00us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Arithmetic average threshold   120.00%amda_DebtInstrumentConvertibleWeightedAverageThreshold
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Subsequent Event | Magna Convertible Notes, Alternate Conversion        
Subsequent Event [Line Items]        
Common stock at a fixed conversion price       $ 0.20us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesAlternateConversionMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Arithmetic average threshold   80.00%amda_DebtInstrumentConvertibleWeightedAverageThreshold
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesAlternateConversionMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Subsequent Event | Secondary Offering Warrant        
Subsequent Event [Line Items]        
Warrants exercised     8,713,766amda_ClassofWarrantorRightWarrantsExercised
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_SubsidiarySaleOfStockAxis
= amda_SecondaryOfferingWarrantMember
 
Class of warrant outstanding     3,554,841us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_SubsidiarySaleOfStockAxis
= amda_SecondaryOfferingWarrantMember
 
Subsequent Event | Secondary Offering Warrant | Common Stock        
Subsequent Event [Line Items]        
Warrants converted into shares of common stock     26,279,501amda_StockIssuedDuringPeriodSharesWarrantsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_SubsidiarySaleOfStockAxis
= amda_SecondaryOfferingWarrantMember