Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2024
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	*Basis of Presentation and Consolidation* These consolidated financial statements include the accounts of Aemetis, Inc. and its subsidiaries. We consolidate all entities in which we have a controlling financial interest. A controlling financial interest is usually obtained through ownership of a majority of the voting interests. However, an enterprise must consolidate a variable interest entity (“VIE”) if the enterprise is the primary beneficiary of the VIE, even if the enterprise does not own a majority of the voting interests. The primary beneficiary is the party that has both the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance, and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. We consider Aemetis Biogas LLC ("ABGL") to be a VIE because the Company owns all of the outstanding common units of ABGL and is the primary beneficiary of ABGL's operations; accordingly, the assets, liabilities, and operations of ABGL are consolidated in these financial statements. All intercompany balances and transactions have been eliminated in consolidation. The accompanying consolidated condensed balance sheet as of March 31, 2024, the consolidated condensed statements of operations and comprehensive loss for the three months ended March 31, 2024 and 2023, the consolidated condensed statements of cash flows for the three months ended March 31, 2024 and 2023, and the consolidated condensed statements of stockholders’ deficit for the three months ended March 31, 2024 and 2023 are unaudited. The consolidated condensed balance sheet as of December 31, 2023, was derived from the 2023 audited consolidated financial statements and notes thereto. The consolidated condensed financial statements in this report should be read in conjunction with the 2023 audited consolidated financial statements and notes thereto included in the Company’s annual report on Form 10-K for the year ended December 31, 2023. The accompanying consolidated condensed financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) and pursuant to the rules and regulations of the SEC. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. In the opinion of Company’s management, the unaudited interim consolidated condensed financial statements as of and for the three months ended March 31, 2024 and 2023 have been prepared on the same basis as the audited consolidated statements as of and for the year ended December 31, 2023 and reflect all adjustments, consisting primarily of normal recurring adjustments, necessary for the fair presentation of its statement of financial position, results of operations and cash flows. The results of operations for the three months ended March 31, 2024 are not necessarily indicative of the operating results for any subsequent quarter, for the full fiscal year or any future periods. There have been no material changes to our significant accounting policies disclosed in Note 1 - Nature of Activities and Summary of Significant Accounting Policies of the Notes to the Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2023.

Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

Basis of Accounting, Policy [Policy Text Block]

Basis of Presentation and Consolidation

These consolidated financial statements include the accounts of Aemetis, Inc. and its subsidiaries. We consolidate all entities in which we have a controlling financial interest. A controlling financial interest is usually obtained through ownership of a majority of the voting interests. However, an enterprise must consolidate a variable interest entity (“VIE”) if the enterprise is the primary beneficiary of the VIE, even if the enterprise does not own a majority of the voting interests. The primary beneficiary is the party that has both the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance, and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. We consider Aemetis Biogas LLC ("ABGL") to be a VIE because the Company owns all of the outstanding common units of ABGL and is the primary beneficiary of ABGL's operations; accordingly, the assets, liabilities, and operations of ABGL are consolidated in these financial statements.

All intercompany balances and transactions have been eliminated in consolidation.

The accompanying consolidated condensed balance sheet as of March 31, 2024, the consolidated condensed statements of operations and comprehensive loss for the three months ended March 31, 2024 and 2023, the consolidated condensed statements of cash flows for the three months ended March 31, 2024 and 2023, and the consolidated condensed statements of stockholders’ deficit for the three months ended March 31, 2024 and 2023 are unaudited. The consolidated condensed balance sheet as of December 31, 2023, was derived from the 2023 audited consolidated financial statements and notes thereto. The consolidated condensed financial statements in this report should be read in conjunction with the 2023 audited consolidated financial statements and notes thereto included in the Company’s annual report on Form 10-K for the year ended December 31, 2023. The accompanying consolidated condensed financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) and pursuant to the rules and regulations of the SEC. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations.

In the opinion of Company’s management, the unaudited interim consolidated condensed financial statements as of and for the three months ended March 31, 2024 and 2023 have been prepared on the same basis as the audited consolidated statements as of and for the year ended December 31, 2023 and reflect all adjustments, consisting primarily of normal recurring adjustments, necessary for the fair presentation of its statement of financial position, results of operations and cash flows. The results of operations for the three months ended March 31, 2024 are not necessarily indicative of the operating results for any subsequent quarter, for the full fiscal year or any future periods.

There have been no material changes to our significant accounting policies disclosed in Note 1 - Nature of Activities and Summary of Significant Accounting Policies of the Notes to the Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2023.