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8. Outstanding Warrants (Tables) | 12 Months Ended
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Dec. 31, 2014
Outstanding Warrants Tables |
Schedule of warrant activity |
| Warrants Outstanding & Exercisable |  |  | Weighted - Average Exercise Price |  | Average Remaining Term in Years
Outstanding December 31, 2012 | 181 |  | $ | 2.70 |  |  | 2.67
Granted | 582 |  |  | 2.60 |  |  |
Exercised | (264) |  |  | 0.10 |  |  |
Expired | (29) |  |  | 11.80 |  |  |
Outstanding December 31, 2013 | 470 |  | $ | 3.40 |  |  | 4.85
Granted | 148 |  |  | 0.01 |  |  |
Exercised | (217) |  |  | 1.32 |  |  |
Expired | (50) |  |  | 4.97 |  |  |
Outstanding December 31, 2014 | 351 |  |  | 3.05 |  |  | 2.69

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Namespace Prefix: | AMTX_
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Balance Type: | na
Period Type: | duration

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- Definition Custom Element. + References No definition available. + Details
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Namespace Prefix: | AMTX_
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Balance Type: | na
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