Quarterly report pursuant to Section 13 or 15(d)

Debt - Future Principal Payments on Debt (Details)

v2.4.1.9
Debt - Future Principal Payments on Debt (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Line Of Credit Facility [Line Items]    
Total debt, net carrying amount $ 22,267us-gaap_LongTermDebt $ 22,131us-gaap_LongTermDebt
Hercules Term Loan    
Line Of Credit Facility [Line Items]    
Total debt, net carrying amount 19,157us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= amda_HerculesTermLoanMember
19,070us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= amda_HerculesTermLoanMember
Magna Convertible Notes    
Line Of Credit Facility [Line Items]    
Total debt, net carrying amount 3,110us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
3,061us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
Convertible Notes Payable    
Line Of Credit Facility [Line Items]    
2015 2,949us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
2016 11,964us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
2017 8,567us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
2018 818us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
2019 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
Total debt, net carrying amount 24,298us-gaap_LongTermDebt
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
Convertible Notes Payable | Hercules Term Loan    
Line Of Credit Facility [Line Items]    
2015 2,949us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
/ us-gaap_DebtInstrumentAxis
= amda_HerculesTermLoanMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
2016 7,666us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_DebtInstrumentAxis
= amda_HerculesTermLoanMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
2017 8,567us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ us-gaap_DebtInstrumentAxis
= amda_HerculesTermLoanMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
2018 818us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ us-gaap_DebtInstrumentAxis
= amda_HerculesTermLoanMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
2019 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
/ us-gaap_DebtInstrumentAxis
= amda_HerculesTermLoanMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
Total debt, net carrying amount 20,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= amda_HerculesTermLoanMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
Convertible Notes Payable | Magna Convertible Notes    
Line Of Credit Facility [Line Items]    
2015 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
2016 4,298us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
2017 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
2018 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
2019 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
 
Total debt, net carrying amount $ 4,298us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= amda_MagnaConvertibleNotesMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember