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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

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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