XML 52 R41.htm IDEA: XBRL DOCUMENT v3.23.1

Note 4 - Debt (Details Textual) $ / shares in Units, GT in Millions					3 Months Ended
	Jan. 01, 2023 USD ($) $ / shares shares	Mar. 02, 2022 USD ($) $ / shares shares	Jul. 06, 2012 USD ($)	Mar. 04, 2011 USD ($)	Mar. 31, 2023 USD ($) $ / shares	May 04, 2023 USD ($) GT	Mar. 06, 2023 USD ($)	Mar. 04, 2023 USD ($)	Dec. 31, 2022 USD ($) $ / shares	Oct. 04, 2022 USD ($)	Aug. 08, 2022 USD ($)	Aug. 01, 2022 USD ($)	Jul. 26, 2022 USD ($)	May 11, 2022 USD ($)	Mar. 08, 2022 USD ($)	Aug. 09, 2021 USD ($)	Mar. 14, 2021 USD ($)	May 01, 2020 USD ($)	Mar. 06, 2020 USD ($)	Nov. 21, 2019 USD ($)	Feb. 27, 2019 $ / shares	Jan. 09, 2012 USD ($) $ / shares	Jan. 06, 2012 USD ($)
Long-Term Debt, Total					$ 261,935,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares					$ 15.92				$ 15.92
Short-Term Debt					$ 45,282,000				$ 36,754,000
Long-Term Debt, Current Maturities					$ 17,419,000				$ 12,465,000
Warrants and Rights Outstanding, Term (Year)					7 years 2 months 26 days				7 years 5 months 23 days
Debt, Long-Term and Short-Term, Combined Amount					$ 261,935,000				$ 246,240,000
Other Long-Term Debt, Noncurrent					11,479,000				11,678,000
Stock Issued Under Fuels Revolving Line [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares		100,000
Third Eye Capital [Member] | Five Year Warrants in Connection With New Credit Facility [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares		50,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 10.20
Third Eye Capital [Member] | Ten Year Warrants in Connection With New Credit Facility [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares		250,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 20.00
AAFK [Member] | Warrants in Connection With Subordinated Notes [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	$ 0.01																					$ 0.01
Warrants and Rights Outstanding, Term (Year)	2 years																					2 years
Class of Warrant or Right, Issued (in shares) | shares	113,000
Revolving Credit Facility [Member]
Repayments of Long-Term Lines of Credit		$ 16,000,000.0
Property Taxes Payment		6,100,000
Capital Revolving Credit Facility Fuels And Carbon Lines [Member] | GAFI and ACCI [Member]
Line of Credit Facility, Maximum Borrowing Capacity		100,000,000
Fuels Revolving Line [Member] | GAFI [Member]
Line of Credit Facility, Maximum Borrowing Capacity		50,000,000
Carbon Revolving Line [Member] | ACCI [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 50,000,000
Third Eye Capital [Member] | Mr. McAfee [Member]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk					8,000,000.0
Third Eye Capital [Member] | Revolving Credit Facility [Member]
Debt Instrument, Face Amount			$ 18,000,000.0
Third Eye Capital [Member] | Revolving Credit Facility [Member] | AAFK [Member]
Long-Term Debt, Total					67,000,000.0
Debt Issuance Costs, Net					$ 1,500,000
Third Eye Capital [Member] | Revolving Credit Facility [Member] | Prime Rate [Member]
Debt Instrument, Interest Rate, Stated Percentage					21.75%
Debt Instrument, Basis Spread on Variable Rate			13.75%
Third Eye Capital [Member] | Acquisition Term Notes [Member]
Debt Instrument, Face Amount			$ 15,000,000.0
Third Eye Capital [Member] | Reserve Liquidity Facility [Member]
Debt Instrument, Interest Rate, Stated Percentage					30.00%
Line of Credit Facility, Current Borrowing Capacity					$ 50,000,000.0
Long-Term Debt, Total					$ 0
Term Loan [Member] | Third Eye Capital [Member]
Debt Instrument, Face Amount			7,200,000
Revenue Participation Term Notes [Member] | Third Eye Capital [Member]
Debt Instrument, Face Amount			$ 10,000,000.0
Debt Instrument, Interest Rate, Stated Percentage					5.00%
Revenue Participation Term Notes [Member] | Third Eye Capital [Member] | AAFK [Member]
Long-Term Debt, Total					$ 12,200,000
Debt Issuance Costs, Net					$ 160,000
Amendment No. 22 [Member] | Third Eye Capital [Member]
Debt Instrument, Fee Amount															$ 100,000
Amendment No. 23 [Member] | Third Eye Capital [Member]
Debt Instrument, Fee Amount														$ 100,000
Amendment No. 24 [Member] | Third Eye Capital [Member]
Debt Instrument, Fee Amount											$ 300,000
Debt Instrument, Extension Fee, Percent of Note Indebtedness											1.00%
Amendment No. 25 [Member] | Third Eye Capital [Member]
Debt Instrument, Fee Amount							$ 100,000
Amendment No. 26 [Member] | Third Eye Capital [Member] | Subsequent Event [Member]
Debt Instrument, Fee Amount						$ 100,000
Debt Instrument, Minimum Production Requirement (Gigaton) | GT						10
Reserve Liquidity Facility [Member] | Third Eye Capital [Member]
Debt Instrument, Face Amount																			$ 18,000,000
Line of Credit Facility, Maximum Borrowing Capacity																	$ 70,000,000.0
Debt Instrument, Non-refundable Standby Fee, Percent of Difference Between Principal Amount and the Commitment																			2.00%
Non Refundable Fees																			$ 500,000
Line of Credit Facility, Current Borrowing Capacity							$ 50,000,000									$ 40,000,000.0
Reserve Liquidity Facility Paid Monthly in Arrears [Member] | Third Eye Capital [Member]
Debt Instrument, Interest Rate, Stated Percentage																			30.00%
Reserve Liquidity Facility if Event of Default Occurred and Continues [Member] | Third Eye Capital [Member]
Debt Instrument, Interest Rate, Stated Percentage																			40.00%
Term Notes [Member] | Third Eye Capital [Member]
Debt Instrument, Interest Rate, Stated Percentage					14.00%
Long-Term Debt, Total					$ 7,200,000
Debt Issuance Costs, Net					70,000
Acquisition Term Notes [Member] | Third Eye Capital [Member] | Aemetis Facility Keyes, Inc. [Member]
Long-Term Debt, Total					26,900,000
Debt Issuance Costs, Net					300,000
Debt Instrument, Redemption Fee					$ 7,500,000
Acquisition Term Notes [Member] | Third Eye Capital [Member] | Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate			10.75%		18.75%
Fuels Revolving Line [Member] | GAFI [Member]
Debt Instrument, Interest Rate, Stated Percentage		10.00%
Fuels Revolving Line [Member] | Prime Rate [Member] | GAFI [Member]
Debt Instrument, Basis Spread on Variable Rate		6.00%
Carbon Revolving Line [Member] | GAFI [Member]
Long-Term Debt, Total					$ 26,100,000
Debt Issuance Costs, Net					1,900,000
Short-Term Debt					4,800,000
Carbon Revolving Line [Member] | ACCI [Member]
Debt Instrument, Interest Rate, Stated Percentage		8.00%
Line of Credit Facility, Current Borrowing Capacity					1,400,000
Long-Term Debt, Total					24,900,000
Debt Issuance Costs, Net					2,200,000
Short-Term Debt					500,000
Carbon Revolving Line [Member] | Prime Rate [Member] | ACCI [Member]
Debt Instrument, Basis Spread on Variable Rate		4.00%
Carbon Revolving Line [Member] | Third Eye Capital [Member] | ACCI [Member]
Long-Term Debt, Current Maturities					6,700,000
Cilion Shareholder Seller Notes Payable [Member]
Debt Instrument, Interest Rate, Stated Percentage			3.00%
Debt, Long-Term and Short-Term, Combined Amount					6,871,000				6,821,000
Cilion Shareholder Seller Notes Payable [Member] | Aemetis Facility Keyes, Inc. [Member]
Long-Term Debt, Total					6,900,000
Subordinated Notes [Member] | AAFK [Member]
Debt Instrument, Fee Amount																						$ 2,500,000	$ 900,000
Short-Term Debt					16,100,000				15,900,000
Debt Instrument Fee Rate																						10.00%
Debt Extension Fee, Percentage																						10.00%
Subordinated Notes 1 [Member]
Debt, Long-Term and Short-Term, Combined Amount					16,106,000				15,931,000
Subordinated Notes 1 [Member] | AAFK [Member]
Debt Instrument, Cash Extension Fee	$ 90,000
Subordinated Notes 2 [Member] | AAFK [Member]
Debt Instrument, Cash Extension Fee	$ 250,000
EB5 Phase I Notes [Member]
Debt Instrument, Face Amount				$ 500,000
Long-Term Debt, Total					37,400,000				37,200,000
Debt Instrument, Term (Year)				4 years
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares																					$ 30
Debt Instrument, Amount Released From Escrow									35,500,000
Debt Instrument, Amount Remaining Funded to Escrow									500,000
EB5 Phase I Notes [Member] | Minimum [Member]
Debt Instrument, Investment Raised Per Investor																		$ 500,000
EB5 Phase I Funding [Member]
Debt Instrument, Face Amount				$ 36,000,000.0
EB5 Phase I Funding [Member] | Maximum [Member]
Debt Instrument, Face Amount				$ 36,000,000.0
EB5 Phase II Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage																				3.00%
Debt Instrument, Amount Remaining Funded to Escrow					46,800,000
Debt Instrument, Principal Amount Sold					4,000,000.0
Debt, Long-Term and Short-Term, Combined Amount					4,200,000				4,200,000
EB5 Phase II Notes [Member] | Maximum [Member]
Debt Instrument, Minimum Investment Raised Per Investor																				$ 900,000
Debt Instrument, Investment Raised Per Investor																		900,000
Aggregate Principal Amount																		$ 50,800,000
EB5 Phase II Notes [Member] | Minimum [Member]
Debt Instrument, Minimum Investment Raised Per Investor																				$ 500,000
Secunderabad Oils [Member]
Debt Instrument, Interest Rate, Stated Percentage													18.00%
Short-Term Debt					2,700,000				0
Debt Agreement, Maximum Borrowing Capacity													$ 1,880,000
Leo Edibles & Fats Limited [Member]
Debt Agreement, Maximum Borrowing Capacity												$ 1,270,000
IndusInd Bank and HDFC Bank Secured Loans [Member]
Short-Term Debt					$ 3,535,000				0
IndusInd Bank and HDFC Bank Secured Loans [Member] | Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage					8.00%
IndusInd Bank and HDFC Bank Secured Loans [Member] | Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage					6.00%
Construction Loan Agreement [Member]
Debt Instrument, Interest Rate, Stated Percentage								9.00%		5.95%
Long-Term Debt, Total					$ 21,700,000				20,200,000
Debt Issuance Costs, Net					0			$ 9,000	300,000
Short-Term Debt					21,728,000				$ 19,820,000
Debt Agreement, Maximum Borrowing Capacity										$ 25,000,000
Usda Annual Renewal Fee										0.25%
Financing Agreement For Capital Expenditures [Member]
Debt Instrument, Face Amount					5,700,000
Short-Term Debt					1,200,000
Other Long-Term Debt, Noncurrent					$ 4,600,000

X

- Definition

Represents aggregate principal amount.

+ References

No definition available.

+ Details

Name:	amtx_AggregatePrincipalAmount
Namespace Prefix:	amtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Number of warrants or rights issued during a period of time.

+ References

No definition available.

+ Details

Name:	amtx_ClassOfWarrantOrRightIssued
Namespace Prefix:	amtx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents maximum borrowing capacity under debt agreement.

+ References

No definition available.

+ Details

Name:	amtx_DebtAgreementMaximumBorrowingCapacity
Namespace Prefix:	amtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The percentage of debt extension fee.

+ References

No definition available.

+ Details

Name:	amtx_DebtExtensionFeePercentage
Namespace Prefix:	amtx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents amount released from Escrow under debt instrument.

+ References

No definition available.

+ Details

Name:	amtx_DebtInstrumentAmountReleasedFromEscrow
Namespace Prefix:	amtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents amount remaining funded to escrow under debt instrument.

+ References

No definition available.

+ Details

Name:	amtx_DebtInstrumentAmountRemainingFundedToEscrow
Namespace Prefix:	amtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of the cash extension fee that accompanies borrowing money under the debt instrument.

+ References

No definition available.

+ Details

Name:	amtx_DebtInstrumentCashExtensionFee
Namespace Prefix:	amtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents extended fee rate added to balance outstanding under debt instrument.

+ References

No definition available.

+ Details

Name:	amtx_DebtInstrumentExtendedFeeRateAddedToBalanceOutstanding
Namespace Prefix:	amtx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of extension fee of debt instrument as percentage of note indebtedness.

+ References

No definition available.

+ Details

Name:	amtx_DebtInstrumentExtensionFeePercentOfNoteIndebtedness
Namespace Prefix:	amtx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents investment raised per investor under debt instrument.

+ References

No definition available.

+ Details

Name:	amtx_DebtInstrumentInvestmentRaisedPerInvestor
Namespace Prefix:	amtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Minimum Amount of investment raised per investor under debt instrument.

+ References

No definition available.

+ Details

Name:	amtx_DebtInstrumentMinimumInvestmentRaisedPerInvestor
Namespace Prefix:	amtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents minimum production requirement for debt instrument.

+ References

No definition available.

+ Details

Name:	amtx_DebtInstrumentMinimumProductionRequirement
Namespace Prefix:	amtx_
Data Type:	dtr-types:massItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents non-refundable one-time Fees of debt instrument.

+ References

No definition available.

+ Details

Name:	amtx_DebtInstrumentNonRefundableOneTimeFees
Namespace Prefix:	amtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents non-refundable standby fee of debt instrument as a percentage of difference between principal amount outstanding and the commitment.

+ References

No definition available.

+ Details

Name:	amtx_DebtInstrumentNonrefundableStandbyFeePercentOfDifferenceBetweenPrincipalAmountAndTheCommitment
Namespace Prefix:	amtx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of principal amount that has been sold under debt instrument.

+ References

No definition available.

+ Details

Name:	amtx_DebtInstrumentPrincipalAmountSold
Namespace Prefix:	amtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents redemption fee under debt instrument agreement.

+ References

No definition available.

+ Details

Name:	amtx_DebtInstrumentRedemptionFee
Namespace Prefix:	amtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents property taxes payment.

+ References

No definition available.

+ Details

Name:	amtx_PaymentOfPropertyTaxes
Namespace Prefix:	amtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the USDA annual renewal fee.

+ References

No definition available.

+ Details

Name:	amtx_UsdaAnnualRenewalFee
Namespace Prefix:	amtx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-5

+ Details

Name:	us-gaap_DebtInstrumentConvertibleConversionPrice1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482900/835-30-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69C
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482925/835-30-45-2

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482949/835-30-55-8

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of the fee that accompanies borrowing money under the debt instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_DebtInstrumentFeeAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the aggregate of total long-term debt, including current maturities and short-term debt.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtLongtermAndShorttermCombinedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482925/835-30-45-3

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D

+ Details

Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69C
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-4

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as current. Excludes lease obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(20))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_LongTermDebtCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Net amount at risk, representing the guaranteed benefit in excess of the current account balance corresponding to the specified product, guarantee type and subset of the guarantee.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 944
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479808/944-20-55-15

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 944
-SubTopic 80
-Section 50
-Paragraph 1
-Subparagraph (d)(3),(5)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480109/944-80-50-1

+ Details

Name:	us-gaap_NetAmountAtRiskByProductAndGuaranteeNetAmountAtRisk
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of long-term debt classified as other, payable after one year or the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(13)(a)(4))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479617/946-210-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_OtherLongTermDebtNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-15

+ Details

Name:	us-gaap_RepaymentsOfLongTermLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481372/852-10-55-10

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_ShortTermBorrowings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Number of new stock issued during the period.

+ 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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481004/946-505-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(4)(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_WarrantsAndRightsOutstandingTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=amtx_StockIssuedUnderFuelsRevolvingLineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=amtx_ThirdEyeCapitalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=amtx_FiveYearWarrantsInConnectionWithNewCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=amtx_TenYearWarrantsInConnectionWithNewCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=amtx_AafkMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=amtx_WarrantsInConnectionWithSubordinatedNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=amtx_CapitalRevolvingCreditFacilityFuelsAndCarbonLinesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=amtx_GafiAndAcciMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=amtx_FuelsRevolvingLineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=amtx_GafiMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=amtx_CarbonRevolvingLineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=amtx_AcciMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=amtx_ThirdEyeCapitalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=amtx_MrMcafeeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_PrimeRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=amtx_AcquisitionTermNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=amtx_ReserveLiquidityFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_RevenueParticipationTermNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_AmendmentNo22Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_AmendmentNo23Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_AmendmentNo24Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_AmendmentNo25Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_AmendmentNo26Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_ReserveLiquidityFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_ReserveLiquidityFacilityPaidMonthlyInArrearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_ReserveLiquidityFacilityIfEventOfDefaultOccurredAndContinuesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_TermNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_AcquisitionTermNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=amtx_AemetisFacilityKeyesIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_FuelsRevolvingLineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_CilionShareholderSellerNotesPayableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_SubordinatedNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_SubordinatedNotes1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_SubordinatedNotes2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_EB5PhaseINotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_Eb5PhaseIFundingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_EB5PhaseIINotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_SecunderabadOilsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_LeoEdiblesFatsLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_IndusindBankAndHdfcBankSecuredLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_ConstructionLoanAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=amtx_FinancingAgreementForCapitalExpendituresMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: