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3. Inventory (Details Narrative) (USD $) | Dec. 31, 2012 | Dec. 31, 2011
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Inventory Details Narrative |  |
Lower of cost of market reserve | $ 104,894 | $ 223,069

X
- Details
Name: | AMTX_InventoryDetailsNarrativeAbstract
Namespace Prefix: | AMTX_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Total cost of goods sold + References No definition available. + Details
Name: | AMTX_LowerOfCostOfMarketReserve
Namespace Prefix: | AMTX_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant