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8. Agreements (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract] |  |  |  |
Ethanol sales | $ 0 | $ 27,456 | $ 26,049 | $ 84,453
Wet distiller's grains sales | 7,143 | 8,783 | 22,983 | 26,119
Corn oil sales | 827 | 934 | 2,806 | 2,586
Corn purchases | 25,513 | 30,446 | 77,268 | 90,426
Accounts receivable | 161 | 1,066 | 161 | 1,066
Accounts payable | $ 1,978 | $ 2,484 | $ 1,978 | $ 2,484

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

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- References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Proceeds from borrowing under secured debt facilities + References No definition available. + Details
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- Definition Wet distiller's grains sales + References No definition available. + Details
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- References No definition available. + Details
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