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15. Related Party Transactions (Details Narrative) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Eric McAfee and McAfee Capital
Related party debt	$ 400us-gaap_AccountsPayableRelatedPartiesCurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = AMTX_EricMcAfeeMember	$ 1,000us-gaap_AccountsPayableRelatedPartiesCurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = AMTX_EricMcAfeeMember
Related party transaction	191us-gaap_RelatedPartyTransactionAmountsOfTransaction / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = AMTX_EricMcAfeeMember	110us-gaap_RelatedPartyTransactionAmountsOfTransaction / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = AMTX_EricMcAfeeMember	65us-gaap_RelatedPartyTransactionAmountsOfTransaction / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = AMTX_EricMcAfeeMember
Guarantee fee agreement	172AMTX_GuaranteeFeeAgreement / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = AMTX_EricMcAfeeMember
Accured guarantee fee	28AMTX_AccuredGuaranteeFee / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = AMTX_EricMcAfeeMember
Laird Cagan
Shares distributed to satisfy revolving line of credit debt	1,200AMTX_SharesDistributedToSatisfyRevolvingLineOfCreditDebt / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = AMTX_LairdCaganMember	6,200AMTX_SharesDistributedToSatisfyRevolvingLineOfCreditDebt / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = AMTX_LairdCaganMember
Board Members
Related party debt	1,700us-gaap_AccountsPayableRelatedPartiesCurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = AMTX_BoardMembersMember	1,700us-gaap_AccountsPayableRelatedPartiesCurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = AMTX_BoardMembersMember
Related party transaction	$ 400us-gaap_RelatedPartyTransactionAmountsOfTransaction / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = AMTX_BoardMembersMember	$ 400us-gaap_RelatedPartyTransactionAmountsOfTransaction / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = AMTX_BoardMembersMember	$ 400us-gaap_RelatedPartyTransactionAmountsOfTransaction / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = AMTX_BoardMembersMember

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+ References

No definition available.

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- Definition

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- Definition

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+ References

No definition available.

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- Definition

Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(k)(1))

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-Name Regulation S-X (SX)

-Number 210

-Section 08

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-Number 210

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Amount of transactions with related party during the financial reporting period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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