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14. Segment Information (Details 1) (USD $) | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Segment Information Details 1 |  |
India | $ 15,597,333 | $ 15,654,763
North America (United States) | 81,274,826 | 11,563,132
Other | 0 | 26
Total Assets | $ 96,872,159 | $ 27,217,921

X
- Definition Total debt + References No definition available. + Details
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Namespace Prefix: | AMTX_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition North America (United States) + References No definition available. + Details
Name: | AMTX_NorthAmericaUnitedStates
Namespace Prefix: | AMTX_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Other3 + References No definition available. + Details
Name: | AMTX_Other3
Namespace Prefix: | AMTX_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | AMTX_SegmentInformationDetails1Abstract
Namespace Prefix: | AMTX_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total Assets + References No definition available. + Details
Name: | AMTX_TotalAssets
Namespace Prefix: | AMTX_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant