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17. Parent Company Financial Statements (Unaudited) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | --- | --- | ---
Current assets |  |  |  |  |  |
Prepaid expenses | $ 1,392 us-gaap_PrepaidExpenseCurrent |  | $ 584 us-gaap_PrepaidExpenseCurrent |  |  |
Total current assets | 7,933 us-gaap_AssetsCurrent |  | 12,707 us-gaap_AssetsCurrent |  |  |
Other assets | 2,929 us-gaap_OtherAssets |  | 2,923 us-gaap_OtherAssets |  |  |
Total Assets | 89,176 us-gaap_Assets |  | 97,142 us-gaap_Assets |  |  |
Liabilities & stockholders' deficit |  |  |  |  |  |
Accounts payable | 8,339 us-gaap_AccountsPayableCurrent |  | 9,366 us-gaap_AccountsPayableCurrent |  |  |
Other current liabilities | 3,590 us-gaap_OtherLiabilitiesCurrent |  | 6,245 us-gaap_OtherLiabilitiesCurrent |  |  |
Total current liabilities | 27,316 us-gaap_LiabilitiesCurrent |  | 36,117 us-gaap_LiabilitiesCurrent |  |  |
Subsidiary obligation in excess of investment |  |  |  |  |  |
Total long term liabilities | 64,832 us-gaap_LongTermDebt |  | 73,792 us-gaap_LongTermDebt |  |  |
Stockholders' deficit |  |  |  |  |  |
Series B Preferred convertible stock | 2 us-gaap_PreferredStockValue |  | 2 us-gaap_PreferredStockValue |  |  |
Common stock | 21 us-gaap_CommonStockValue | [1] | 20 us-gaap_CommonStockValue | [1] |  |
Additional paid-in capital | 87,080 us-gaap_AdditionalPaidInCapitalCommonStock | [1] | 84,373 us-gaap_AdditionalPaidInCapitalCommonStock | [1] |  |
Accumulated deficit | (87,113)us-gaap_RetainedEarningsAccumulatedDeficit |  | (94,246)us-gaap_RetainedEarningsAccumulatedDeficit |  |  |
Accumulated other comprehensive loss | (2,962)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax |  | (2,916)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax |  |  |
Total stockholders' deficit | (2,972)us-gaap_StockholdersEquity |  | (12,767)us-gaap_StockholdersEquity |  | 3,514 us-gaap_StockholdersEquity | (22,204)us-gaap_StockholdersEquity
Total liabilities & stockholders' deficit | 89,176 us-gaap_LiabilitiesAndStockholdersEquity |  | 97,142 us-gaap_LiabilitiesAndStockholdersEquity |  |  |
Parent Company Financial Statements |  |  |  |  |  |
Current assets |  |  |  |  |  |
Cash and cash equivalents | 65 AMTX_CashAndCashEquivalents / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 14 AMTX_CashAndCashEquivalents / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Intercompany receivables | 24,578 AMTX_IntercompanyReceivables / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 27,627 AMTX_IntercompanyReceivables / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Prepaid expenses | 609 us-gaap_PrepaidExpenseCurrent / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 0 us-gaap_PrepaidExpenseCurrent / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Total current assets | 25,252 us-gaap_AssetsCurrent / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 27,641 us-gaap_AssetsCurrent / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Investment in Aemetis International, Inc. | 1,082 AMTX_InvestmentInAemetisInternationalInc. / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 2,679 AMTX_InvestmentInAemetisInternationalInc. / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Investment in Aemetis Americas, Inc | 0 AMTX_InvestmentInAemetisAmericasInc / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 0 AMTX_InvestmentInAemetisAmericasInc / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Total investments in Subsidiaries, net of advances | 1,082 AMTX_TotalInvestmentsInSubsidiariesNetOfAdvances / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 2,679 AMTX_TotalInvestmentsInSubsidiariesNetOfAdvances / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Other assets | 23 us-gaap_OtherAssets / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 23 us-gaap_OtherAssets / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Total Assets | 26,357 us-gaap_Assets / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 30,343 us-gaap_Assets / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Liabilities & stockholders' deficit |  |  |  |  |  |
Accounts payable | 2,869 us-gaap_AccountsPayableCurrent / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 3,397 us-gaap_AccountsPayableCurrent / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Outstanding checks in excess of cash | 0 AMTX_OutstandingChecksInExcessOfCash / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 0 AMTX_OutstandingChecksInExcessOfCash / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Mandatorily redeemable Series B convertibe preferred | 2,641 AMTX_MandatorilyRedeemableSeriesBConvertibePreferred / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 2,540 AMTX_MandatorilyRedeemableSeriesBConvertibePreferred / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Other current liabilities | 996 us-gaap_OtherLiabilitiesCurrent / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 1,678 us-gaap_OtherLiabilitiesCurrent / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Total current liabilities | 6,506 us-gaap_LiabilitiesCurrent / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 7,615 us-gaap_LiabilitiesCurrent / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Subsidiary obligation in excess of investment |  |  |  |  |  |
Investment in AE Advanced Fuels, Inc. | 18,497 AMTX_InvestmentInAeAdvancedFuelsInc. / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 31,325 AMTX_InvestmentInAeAdvancedFuelsInc. / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Investment in Aemetis Americas, Inc | 205 AMTX_InvestmentInAemetisAmericasIncObligationInExcessOfInvestment / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 247 AMTX_InvestmentInAemetisAmericasIncObligationInExcessOfInvestment / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Investment in Aemetis Biofuels, Inc. | 2,741 AMTX_InvestmentInAemetisBiofuelsIncObligationInExcessOfInvestment / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 2,741 AMTX_InvestmentInAemetisBiofuelsIncObligationInExcessOfInvestment / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Investment in Aemetis Technologies, Inc. | 1,031 AMTX_InvestmentInAemetisTechnologiesIncObligationInExcessOfInvestment / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 833 AMTX_InvestmentInAemetisTechnologiesIncObligationInExcessOfInvestment / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Investment in Biofuels Marketing, Inc. | 349 AMTX_InvestmentInBiofuelsMarketingIncObligationInExcessOfInvestment / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 349 AMTX_InvestmentInBiofuelsMarketingIncObligationInExcessOfInvestment / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Total subsidiary obligation in excess of investment | 22,823 AMTX_TotalSubsidiaryObligationInExcessOfInvestmentObligationInExcessOfInvestment / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 35,495 AMTX_TotalSubsidiaryObligationInExcessOfInvestmentObligationInExcessOfInvestment / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Total long term liabilities | 22,823 us-gaap_LongTermDebt / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 35,495 us-gaap_LongTermDebt / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Stockholders' deficit |  |  |  |  |  |
Series B Preferred convertible stock | 2 us-gaap_PreferredStockValue / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 2 us-gaap_PreferredStockValue / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Common stock | 21 us-gaap_CommonStockValue / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 20 us-gaap_CommonStockValue / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Additional paid-in capital | 87,080 us-gaap_AdditionalPaidInCapitalCommonStock / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | 84,373 us-gaap_AdditionalPaidInCapitalCommonStock / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Accumulated deficit | (87,113)us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | (94,246)us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Accumulated other comprehensive loss | (2,962)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | (2,916)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Total stockholders' deficit | (2,972)us-gaap_StockholdersEquity / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | (12,767)us-gaap_StockholdersEquity / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
Total liabilities & stockholders' deficit | $ 26,357 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  | $ 30,343 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_BusinessAcquisitionAxis = AMTX_ParentCompanyFinancialStatementsUnauditedMember |  |  |
[1] | The Common Stock and Additional paid-in capital for all periods presented reflect the one-for-ten reverse split, which took effect May 15, 2014.

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