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v2.4.1.9

5. Notes Payable (Details Narrative) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Debt obligation | $ 6,714 us-gaap_ShortTermBorrowings | $ 7,709 us-gaap_ShortTermBorrowings
Other current liabilities | 3,590 us-gaap_OtherLiabilitiesCurrent | 6,245 us-gaap_OtherLiabilitiesCurrent
Third Eye Capital Term Notes |  |
Proceeds from notes payable | 2,000 us-gaap_ProceedsFromNotesPayable / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument1Member |
Principal and interest outstanding | 7,400 AMTX_PrincipalAndInterestOutstanding / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument1Member |
Unamortized discount | 138 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument1Member |
Third Eye Capital Revolving Credit Facility |  |
Principal and interest outstanding | 22,300 AMTX_PrincipalAndInterestOutstanding / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument2Member |
Unamortized debt issuance costs | 447 us-gaap_UnamortizedDebtIssuanceExpense / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument2Member |
Third Eye Capital Revenue Participation Term Notes |  |
Principal and interest outstanding | 10,200 AMTX_PrincipalAndInterestOutstanding / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument3Member |
Unamortized discount | 190 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument3Member |
Third Eye Capital Acquisition Term Notes |  |
Principal and interest outstanding | 17,700 AMTX_PrincipalAndInterestOutstanding / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument4Member |
Unamortized discount | 302 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument4Member |
Cilion shareholder Seller note payable |  |
Principal and interest outstanding | 5,400 AMTX_PrincipalAndInterestOutstanding / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument5Member |
State Bank of India secured term loan |  |
Principal and interest outstanding | 3,400 AMTX_PrincipalAndInterestOutstanding / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument6Member | 2,700 AMTX_PrincipalAndInterestOutstanding / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument6Member
Outstanding debt | 2,600 us-gaap_UnsecuredDebt / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument6Member | 3,200 us-gaap_UnsecuredDebt / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument6Member
Subordinated Notes |  |
Principal and interest outstanding | 5,400 AMTX_PrincipalAndInterestOutstanding / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument7Member | 5,300 AMTX_PrincipalAndInterestOutstanding / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument7Member
Unamortized discount | 0 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument7Member | 300 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument7Member
EB-5 long-term promissory notes |  |
Outstanding accrued interest | 34 AMTX_OutstandingAccruedInterest / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument8Member |
Unsecured working capital loans |  |
Advances | 7,700 AMTX_Advances / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument9Member | 5,200 AMTX_Advances / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument9Member
Principal payments made | 8,300 us-gaap_RepaymentsOfNotesPayable / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument9Member | 4,800 us-gaap_RepaymentsOfNotesPayable / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument9Member
Interest payments | 176 us-gaap_InterestPaid / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument9Member | 181 us-gaap_InterestPaid / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument9Member
Debt obligation | 1,300 us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument9Member | 1,900 us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument9Member
Short-term notes with a series of grants issued by the Maryland Department of Business and Economic Development |  |
Other long term liabilities | 277 us-gaap_OtherLiabilitiesNoncurrent / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument10Member |
Other current liabilities | $ 88 us-gaap_OtherLiabilitiesCurrent / us-gaap_DebtInstrumentAxis = AMTX_DebtInstrument10Member |

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