Insider Trading Arrangements	12 Months Ended
Dec. 31, 2023 shares
ecd_TradingArrByIndTable
Material Terms of Trading Arrangement [Text Block]	Item 9B. Other Information. (a) Current Reports On March 25, 2024, the Company entered into two agreements with Third Eye Capital entitled "Limited Waiver and Amendment No. 28 to Amended and Restated Note Purchase Agreement" and "Seventh Amended and Restated Promissory Note." These agreements are described in Note 4, Debt, and Note 15, Subsequent Events, to the Consolidated Financial Reports in Item 8 of this Report. Copies of the two agreements are included in this Report as Exhibits 10.36 and 10.37, respectively. The descriptions of the two documents in Item 8 are only a summary and are qualified by the terms of the documents included in Exhibits 10.36 and 10.37. (b) Adoption and Termination of Rule 10b5-1 Stock Trading Plans by Officers and Directors On September 15, 2023, Francis P. Barton, a member of the Company's Board of Directors, adopted a trading arrangement for the sale of the Company's common stock (a "Rule 10b5-1 Trading Plan") that (i) became effective December 15, 2023, (ii) has a term lasting until December 31, 2024, (iii) provides for the sale of up to 126,000 shares of common stock to be issued upon exercise of options currently held by Mr. Barton, (iv) sets a limit order designating the minimum price upon which sales may occur, and (v) is intended to satisfy the affirmative defense of Securities Exchange Act Rule 10b5-1(c). On September 15, 2023, Todd A. Waltz, Executive Vice President and Chief Financial Officer of the Company, adopted a Rule 10b5-1 Trading Plan that (i) took effect January 1, 2024, (ii) terminates June 15, 2025, (iii) provides for the sale of up to 475,000 shares of common stock to be issued upon the exercise of options currently held by Mr. Waltz, (iv) contains multiple limit orders designating the minimum prices upon which sales may occur, and (v) is intended to satisfy the affirmative defense of Securities Exchange Act Rule 10b5-1(c). Mr. Waltz's newly adopted plan replaces a previously adopted plan that expired on December 31, 2023, and provided for the sale of up to 475,000 shares on limit order terms. No shares were transacted under the expired plan. On November 13, 2023, Andrew B. Foster, Executive Vice President and Chief Operating Officer of the Company, adopted a Rule 10b5-1 Trading Plan that (i) took effect February 14, 2024, (ii) has a term lasting until December 31, 2024, (iii) provides for the sale of up to 199,616 shares of common stock to be issued upon exercise of options currently held by Mr. Foster, (iv) contains multiple limit orders designating the minimum prices upon which sales may occur, and (v) is intended to satisfy the affirmative defense conditions of Securities Exchange Act Rule 10b5-1(c). Mr. Foster's newly adopted Rule 10b5-1 Trading Plan replaces a previously adopted plan that expired on December 31, 2023, and provided for the sale of 96,000 shares of common stock on limit order terms. No shares were transacted under the expired plan.
Non-Rule 10b5-1 Arrangement Adopted [Flag]	false
Non-Rule 10b5-1 Arrangement Terminated [Flag]	false
Rule 10b5-1 Arrangement Terminated [Flag]	false
AMTX_Francis P. Barton [Member]
ecd_TradingArrByIndTable
Trading Arrangement, Securities Aggregate Available Amount	126,000
Trading Arrangement Adoption Date	September 15, 2023
Trading Arrangement, Individual Name	Francis P. Barton
Trading Arrangement, Individual Title	Board of Directors Member
Rule 10b5-1 Arrangement Adopted [Flag]	true
AMTX, Todd A. Waltz [Member]
ecd_TradingArrByIndTable
Trading Arrangement, Securities Aggregate Available Amount	475,000
Trading Arrangement Adoption Date	September 15, 2023
Trading Arrangement, Individual Name	Todd A. Waltz
Trading Arrangement, Individual Title	Executive Vice President and Chief Financial Officer
Rule 10b5-1 Arrangement Adopted [Flag]	true
AMTX_Andrew B. Foster [Member]
ecd_TradingArrByIndTable
Trading Arrangement, Securities Aggregate Available Amount	199,616
Trading Arrangement Adoption Date	November 13, 2023
Trading Arrangement, Individual Name	Andrew B. Foster
Trading Arrangement, Individual Title	Executive Vice President and Chief Operating Officer
Rule 10b5-1 Arrangement Adopted [Flag]	true

Insider Trading Arrangements

12 Months Ended

Dec. 31, 2023

Material Terms of Trading Arrangement [Text Block]

Item 9B. Other Information.

(a) Current Reports

On March 25, 2024, the Company entered into two agreements with Third Eye Capital entitled "Limited Waiver and Amendment No. 28 to Amended and Restated Note Purchase Agreement" and "Seventh Amended and Restated Promissory Note." These agreements are described in Note 4, Debt, and Note 15, Subsequent Events, to the Consolidated Financial Reports in Item 8 of this Report. Copies of the two agreements are included in this Report as Exhibits 10.36 and 10.37, respectively. The descriptions of the two documents in Item 8 are only a summary and are qualified by the terms of the documents included in Exhibits 10.36 and 10.37.

(b) Adoption and Termination of Rule 10b5-1 Stock Trading Plans by Officers and Directors

On September 15, 2023, Francis P. Barton, a member of the Company's Board of Directors, adopted a trading arrangement for the sale of the Company's common stock (a "Rule 10b5-1 Trading Plan") that (i) became effective December 15, 2023, (ii) has a term lasting until December 31, 2024, (iii) provides for the sale of up to 126,000 shares of common stock to be issued upon exercise of options currently held by Mr. Barton, (iv) sets a limit order designating the minimum price upon which sales may occur, and (v) is intended to satisfy the affirmative defense of Securities Exchange Act Rule 10b5-1(c).

On September 15, 2023, Todd A. Waltz, Executive Vice President and Chief Financial Officer of the Company, adopted a Rule 10b5-1 Trading Plan that (i) took effect January 1, 2024, (ii) terminates June 15, 2025, (iii) provides for the sale of up to 475,000 shares of common stock to be issued upon the exercise of options currently held by Mr. Waltz, (iv) contains multiple limit orders designating the minimum prices upon which sales may occur, and (v) is intended to satisfy the affirmative defense of Securities Exchange Act Rule 10b5-1(c). Mr. Waltz's newly adopted plan replaces a previously adopted plan that expired on December 31, 2023, and provided for the sale of up to 475,000 shares on limit order terms. No shares were transacted under the expired plan.

On November 13, 2023, Andrew B. Foster, Executive Vice President and Chief Operating Officer of the Company, adopted a Rule 10b5-1 Trading Plan that (i) took effect February 14, 2024, (ii) has a term lasting until December 31, 2024, (iii) provides for the sale of up to 199,616 shares of common stock to be issued upon exercise of options currently held by Mr. Foster, (iv) contains multiple limit orders designating the minimum prices upon which sales may occur, and (v) is intended to satisfy the affirmative defense conditions of Securities Exchange Act Rule 10b5-1(c). Mr. Foster's newly adopted Rule 10b5-1 Trading Plan replaces a previously adopted plan that expired on December 31, 2023, and provided for the sale of 96,000 shares of common stock on limit order terms. No shares were transacted under the expired plan.