Note 15 - Subsequent Events	12 Months Ended
Dec. 31, 2023
Notes to Financial Statements
Subsequent Events [Text Block]	15. Subsequent Events Subordinated Notes On January 1, 2024, the maturity on two accredited investor's Subordinated Notes was extended until the earlier of (i) June 30, 2024; (ii) completion of an equity financing by AAFK or Aemetis in an amount of not less than $25 million; (iii) the completion of an Initial Public Offering by AAFK or Aemetis; or (iv) after the occurrence of an Event of Default, including failure to pay interest or principal when due and breaches of note covenants. A $90 thousand and $250 thousand extension fee was paid by adding the fee to the balance of the new Subordinated Note and Aemetis issued the lenders warrants exercisable for 113 thousand shares of common stock with a term of two years and an exercise price of $0.01 per share. The warrants have been fully exercised. Series A Preferred Unit Purchase Agreement On February 8, 2024, ABGL entered into a Fifth Waiver and Amendment to Series A Preferred Unit Purchase Agreement (“PUPA Fifth Amendment"). The PUPA Fifth Amendment: (i) provides an extension of time for ABGL to redeem all of the outstanding Series A Preferred Units until April 30, 2024, and changes the redemption price to $111 million, including fees, (ii) requires ABGL to enter into a twelve-month credit agreement in the amount of $111 million with the lenders if the Series A Preferred Units are not redeemed by such date, and specifies that entry of the credit agreement will satisfy the obligation to redeem the units; and (iii) provides ABGL with a waiver of the obligations of prior agreements to redeem the Series A Preferred Units by any prior dates. Third Eye Capital Reserve Liquidity Facility On March 25, 2024, the Company and Third Eye Capital Corporation entered into a "Seventh Amended and Restated Promissory Note" that increased the amount available under the Company's reserve liquidity facility to $85 million and extended the maturity date to April 1, 2025. Borrowings under the Note are available until maturity on April 1, 2025. Interest on borrowed amounts accrues at a rate of 30% per annum, to be paid monthly in arrears, or 40% if an event of default has occurred and continues. Interest payments due may be capitalized into the principal balance of the Note. The Company will pay a standby fee of 2% per annum of the difference between the aggregate principal outstanding under the Note and the commitment, payable monthly arrears in either cash or stock. The Note also requires the Company to pay a fee in the amount of $0.5 million in connection with a request for an advance on the Note, provided that such fee may be added to the principal amount of the Note. The outstanding principal balance of the indebtedness evidenced by the Note, plus any accrued but unpaid interest and any other sums due thereunder, is due and payable in full on April 1, 2025. In addition, the Company must make payments on the Note with funds received from the closing of certain new debt or equity financing or transactions, as described in the Note. The Note is secured by liens and security interests upon the property and assets of the Company. Third Eye Capital Limited Waiver and Amendment No.* 28* On March 25, 2024, the Company and Third Eye Capital Corporation entered into a “Limited Waiver and Amendment No. 28 to Amended and Restated Note Purchase Agreement” (“Amendment No. 28”) that (i) revised the loan covenant related to Keyes plant note indebtedness to exclude certain draws on Third Eye credit facilities and to exclude the "Redemption Fee," as defined in the Amended and Restated Note Purchase Agreement, and (ii) changed the maximum ratio of Note Indebtedness to the Keyes Plant market value to 120%. As consideration for Amendment No. 28, the Company agreed to pay Third Eye Capital an amendment fee of $0.1 million.

Note 15 - Subsequent Events

12 Months Ended

Dec. 31, 2023

15. Subsequent Events

Subordinated Notes

On January 1, 2024, the maturity on two accredited investor's Subordinated Notes was extended until the earlier of (i) June 30, 2024; (ii) completion of an equity financing by AAFK or Aemetis in an amount of not less than $25 million; (iii) the completion of an Initial Public Offering by AAFK or Aemetis; or (iv) after the occurrence of an Event of Default, including failure to pay interest or principal when due and breaches of note covenants. A $90 thousand and $250 thousand extension fee was paid by adding the fee to the balance of the new Subordinated Note and Aemetis issued the lenders warrants exercisable for 113 thousand shares of common stock with a term of two years and an exercise price of $0.01 per share. The warrants have been fully exercised.

Series A Preferred Unit Purchase Agreement

On February 8, 2024, ABGL entered into a Fifth Waiver and Amendment to Series A Preferred Unit Purchase Agreement (“PUPA Fifth Amendment"). The PUPA Fifth Amendment: (i) provides an extension of time for ABGL to redeem all of the outstanding Series A Preferred Units until April 30, 2024, and changes the redemption price to $111 million, including fees, (ii) requires ABGL to enter into a twelve-month credit agreement in the amount of $111 million with the lenders if the Series A Preferred Units are not redeemed by such date, and specifies that entry of the credit agreement will satisfy the obligation to redeem the units; and (iii) provides ABGL with a waiver of the obligations of prior agreements to redeem the Series A Preferred Units by any prior dates.

Third Eye Capital Reserve Liquidity Facility

On March 25, 2024, the Company and Third Eye Capital Corporation entered into a "Seventh Amended and Restated Promissory Note" that increased the amount available under the Company's reserve liquidity facility to $85 million and extended the maturity date to April 1, 2025. Borrowings under the Note are available until maturity on April 1, 2025. Interest on borrowed amounts accrues at a rate of 30% per annum, to be paid monthly in arrears, or 40% if an event of default has occurred and continues. Interest payments due may be capitalized into the principal balance of the Note. The Company will pay a standby fee of 2% per annum of the difference between the aggregate principal outstanding under the Note and the commitment, payable monthly arrears in either cash or stock. The Note also requires the Company to pay a fee in the amount of $0.5 million in connection with a request for an advance on the Note, provided that such fee may be added to the principal amount of the Note. The outstanding principal balance of the indebtedness evidenced by the Note, plus any accrued but unpaid interest and any other sums due thereunder, is due and payable in full on April 1, 2025. In addition, the Company must make payments on the Note with funds received from the closing of certain new debt or equity financing or transactions, as described in the Note. The Note is secured by liens and security interests upon the property and assets of the Company.

Third Eye Capital Limited Waiver and Amendment No. 28

On March 25, 2024, the Company and Third Eye Capital Corporation entered into a “Limited Waiver and Amendment No. 28 to Amended and Restated Note Purchase Agreement” (“Amendment No. 28”) that (i) revised the loan covenant related to Keyes plant note indebtedness to exclude certain draws on Third Eye credit facilities and to exclude the "Redemption Fee," as defined in the Amended and Restated Note Purchase Agreement, and (ii) changed the maximum ratio of Note Indebtedness to the Keyes Plant market value to 120%. As consideration for Amendment No. 28, the Company agreed to pay Third Eye Capital an amendment fee of $0.1 million.