Fair Value Measurements - Financial Liabilities Measured at Fair Value on Recurring Basis by Level within Fair Value Hierarchy (Details) (Fair Value, Measurements, Recurring, USD $) In Thousands, unless otherwise specified
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Mar. 31, 2015
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Dec. 31, 2014
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
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Derivative liabilities |
$ 13,245us-gaap_DerivativeLiabilities
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$ 13,970us-gaap_DerivativeLiabilities
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Conversion Feature of Note
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
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Derivative liabilities |
3,045us-gaap_DerivativeLiabilities / us-gaap_DebtInstrumentAxis = amda_MagnaInitialConvertibleNotesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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2,612us-gaap_DerivativeLiabilities / us-gaap_DebtInstrumentAxis = amda_MagnaInitialConvertibleNotesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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Level 1
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
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Derivative liabilities |
0us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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0us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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Level 1 | Conversion Feature of Note
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
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Derivative liabilities |
0us-gaap_DerivativeLiabilities / us-gaap_DebtInstrumentAxis = amda_MagnaInitialConvertibleNotesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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0us-gaap_DerivativeLiabilities / us-gaap_DebtInstrumentAxis = amda_MagnaInitialConvertibleNotesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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Level 2
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
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Derivative liabilities |
0us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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0us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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Level 2 | Conversion Feature of Note
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
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Derivative liabilities |
0us-gaap_DerivativeLiabilities / us-gaap_DebtInstrumentAxis = amda_MagnaInitialConvertibleNotesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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0us-gaap_DerivativeLiabilities / us-gaap_DebtInstrumentAxis = amda_MagnaInitialConvertibleNotesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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Level 3
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
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Derivative liabilities |
13,245us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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13,970us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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Level 3 | Conversion Feature of Note
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
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Derivative liabilities |
3,045us-gaap_DerivativeLiabilities / us-gaap_DebtInstrumentAxis = amda_MagnaInitialConvertibleNotesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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2,612us-gaap_DerivativeLiabilities / us-gaap_DebtInstrumentAxis = amda_MagnaInitialConvertibleNotesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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Common Stock
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
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Derivative liabilities |
10,200us-gaap_DerivativeLiabilities / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
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11,358us-gaap_DerivativeLiabilities / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
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Common Stock | Level 1
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
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Derivative liabilities |
0us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
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0us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
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Common Stock | Level 2
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
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Derivative liabilities |
0us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
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0us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
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Common Stock | Level 3
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
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Derivative liabilities |
$ 10,200us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
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$ 11,358us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
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