XML 61 R50.htm IDEA: XBRL DOCUMENT
v3.23.1

Note 6 - Aemetis Biogas LLC, Series A Preferred Financing and Variable Interest Entity (Details Textual) - USD ($) $ / shares in Units, $ in Millions |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 01, 2023 | Aug. 08, 2022 | Dec. 20, 2018 | Mar. 31, 2023 | Dec. 31, 2022
Series A Preferred Units Value |  |  |  | $ 122.5 | $ 116.0
Total Assets of ABGL Company |  |  |  | $ 78.8 |
Carbon Revolving Line [Member] |  |  |  |  |
Repayments of Debt |  | $ 7.3 |  |  |
Extinguishment of Debt, Gain (Loss), Net of Tax |  | (49.4) |  |  |
Preferred Units Series A [Member] |  |  |  |  |
Common Units Authorized (in shares) |  |  | 11,000,000 |  |
Common Units Issued (in shares) |  |  | 6,000,000 |  |
Preferred Unit Dividend Rate Per Dollar Amount (in dollars per share) |  |  | $ 0.50 |  |
Conversion of Stock, Shares Issued (in shares) |  |  | 1,200,000 | 5,000,000 |
Maximum Number of Shares (in shares) |  |  | 5,000,000 |  |
Redeemable Noncontrolling Interest, Equity, Preferred, Redemption Value per Unit (in dollars per share) |  |  | $ 15 |  |
Free Cash Flow Generated by ABGL |  |  | 75.00% | 100.00% |
Redeemable Noncontrolling Interest Equity Redemption Value, Total |  |  | $ 90.0 |  |
Fees and Commission Transfer Agent |  |  | 0.9 |  |
Debt Instrument, Collateral Amount |  |  | $ 30,000.0 |  |
Preferred Units Series A [Member] | First Tranche [Member] |  |  |  |  |
Preferred Units, Issued (in shares) |  |  |  | 3,200,000 |
Preferred Units Issued Value |  |  |  | $ 16.0 |
Preferred Units Series A [Member] | Second Tranche [Member |  |  |  |  |
Preferred Units, Issued (in shares) |  |  |  | 2,800,000 |
Preferred Units Issued Value |  |  |  | $ 14.0 |
Stock Redeemed or Called During Period, Shares (in shares) |  |  |  | 20,000 |
Preferred Units Redeemed, Value |  |  |  | $ 0.3 |
Series A Preferred Stocks [Member] |  |  |  |  |
Common Units Issued (in shares) |  |  | 6,000,000 |  |
Common Units Issuance Value (in dollars per share) |  |  | $ 5.00 |  |
Proceeds from Issuance of Common Units |  |  | $ 30,000.0 |  |
Preferred Units Reserved for Future Issuance (in shares) |  |  | 5,000,000 |  |
Preferred Units Series A Redeemable By December 31, 2022 [Member] |  |  |  |  |
Preferred Units Issued Value | $ 159.0 | 116.0 |  |  |
Preferred Units Series A Redeemable By December 31, 2022 [Member] | ABGL [Member] |  |  |  |  |
Preferred Units Issued Value | $ 125.0 |  |  |  |
Preferred Units Series A Redeemable By September 30, 2022 [Member] | ABGL [Member] |  |  |  |  |
Preferred Units Issued Value |  | $ 106.0 |  |  |

X
- Definition Represents common units authorized. + References No definition available. + Details
Name: | amtx_CommonUnitsAuthorized
Namespace Prefix: | amtx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents common units issuance value. + References No definition available. + Details
Name: | amtx_CommonUnitsIssuanceValue
Namespace Prefix: | amtx_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents common units issued. + References No definition available. + Details
Name: | amtx_CommonUnitsIssued
Namespace Prefix: | amtx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents fees and commission transfer agent. + References No definition available. + Details
Name: | amtx_FeesAndCommissionTransferAgent
Namespace Prefix: | amtx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents free cash flow generated by ABGL. + References No definition available. + Details
Name: | amtx_FreeCashFlowGeneratedByABGL
Namespace Prefix: | amtx_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents maximum number of shares. + References No definition available. + Details
Name: | amtx_MaximumNumberOfShares
Namespace Prefix: | amtx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents preferred unit dividend rate per dollar amount. + References No definition available. + Details
Name: | amtx_PreferredUnitDividendRatePerDollarAmount
Namespace Prefix: | amtx_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents preferred units issued value. + References No definition available. + Details
Name: | amtx_PreferredUnitsIssuedValue
Namespace Prefix: | amtx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents preferred units redeemed, value. + References No definition available. + Details
Name: | amtx_PreferredUnitsRedeemedValue
Namespace Prefix: | amtx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents preferred units reserved for future issuance. + References No definition available. + Details
Name: | amtx_PreferredUnitsReservedForFutureIssuance
Namespace Prefix: | amtx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents proceeds from issuance of common units. + References No definition available. + Details
Name: | amtx_ProceedsFromIssuanceOfCommonUnits
Namespace Prefix: | amtx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents redemption value per unit. + References No definition available. + Details
Name: | amtx_RedeemableNoncontrollingInterestEquityPreferredRedemptionValuePerUnit
Namespace Prefix: | amtx_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents redeemable noncontrolling interest equity redemption value. + References No definition available. + Details
Name: | amtx_RedeemableNoncontrollingInterestEquityRedemptionValueTotal
Namespace Prefix: | amtx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents series A preferred units value. + References No definition available. + Details
Name: | amtx_SeriesAPreferredUnitsValue
Namespace Prefix: | amtx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents total assets of ABGL company. + References No definition available. + Details
Name: | amtx_TotalAssetsOfAbglCompany
Namespace Prefix: | amtx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-4 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-3 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-5 + Details
Name: | us-gaap_ConversionOfStockSharesIssued1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of assets pledged to secure a debt instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480848/942-470-50-3 + Details
Name: | us-gaap_DebtInstrumentCollateralAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The difference between the reacquisition price and the net carrying amount of the extinguished debt recognized currently as a component of income in the period of extinguishment, net of tax. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481303/470-50-40-2 + Details
Name: | us-gaap_ExtinguishmentOfDebtGainLossNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The number of preferred units issued. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-5 + Details
Name: | us-gaap_PreferredUnitsIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of cash outflow for short-term and long-term debt. Excludes payment of lease obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-15 + Details
Name: | us-gaap_RepaymentsOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of stock bought back by the entity at the exercise price or redemption price. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-2 + Details
Name: | us-gaap_StockRedeemedOrCalledDuringPeriodShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=amtx_CarbonRevolvingLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PreferredUnitsByNameAxis=amtx_PreferredUnitsSeriesAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NonmonetaryTransactionTypeAxis=amtx_FirstTrancheMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NonmonetaryTransactionTypeAxis=amtx_SecondTrancheMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PreferredUnitsByNameAxis=amtx_SeriesAPreferredStocksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PreferredUnitsByNameAxis=amtx_PreferredUnitsSeriesARedeemableByDecember312022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=amtx_ABGLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PreferredUnitsByNameAxis=amtx_PreferredUnitsSeriesARedeemableBySeptember302022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |