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Note 7 - Debt (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands							3 Months Ended		89 Months Ended
	Jul. 28, 2023	May 16, 2023	Jan. 01, 2023	Oct. 04, 2022	Mar. 02, 2022	Jul. 06, 2012	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 25, 2024	Jan. 01, 2024	Dec. 31, 2023	Aug. 01, 2022	Jul. 26, 2022	May 01, 2020	Mar. 06, 2020	Feb. 27, 2019	Jan. 09, 2012	Mar. 04, 2011
Long-Term Debt							$ 307,224		$ 307,224
Short-Term Debt							$ 23,937		$ 23,937			$ 23,443
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)							$ 11.7		$ 11.7			$ 11.7
Warrants and Rights Outstanding, Term (Year)							5 years 6 months 14 days		5 years 6 months 14 days			5 years 9 months 7 days
Proceeds from Issuance of Debt							$ 6,223	$ 11,583
Debt, Long-Term and Short-Term, Combined Amount							307,224		$ 307,224			$ 294,721
Other Long-Term Debt, Noncurrent							54,087		54,087			51,717
AAFK [Member] \| Warrants in Connection With Subordinated Notes [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 0.01															$ 0.01
Warrants and Rights Outstanding, Term (Year)			2 years															2 years
Class of Warrant or Right, Issued (in shares)			113
Capital Revolving Credit Facility Fuels And Carbon Lines [Member] \| GAFI and ACCI [Member]
Line of Credit Facility, Maximum Borrowing Capacity					$ 100,000
Fuels Revolving Line [Member] \| GAFI [Member]
Line of Credit Facility, Maximum Borrowing Capacity					50,000
Carbon Revolving Line [Member] \| ACCI [Member]
Line of Credit Facility, Maximum Borrowing Capacity					$ 50,000
Third Eye Capital [Member] \| Mr. McAfee [Member]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk							10,000		10,000
Third Eye Capital [Member] \| Revolving Credit Facility [Member]
Debt Instrument, Face Amount						$ 18,000
Long-Term Debt							24,800		24,800
Debt Issuance Costs, Net							$ 1,000		$ 1,000
Third Eye Capital [Member] \| Revolving Credit Facility [Member] \| Prime Rate [Member]
Debt Instrument, Interest Rate, Stated Percentage							22.25%		22.25%
Debt Instrument, Basis Spread on Variable Rate						13.75%
Third Eye Capital [Member] \| Acquisition Term Notes [Member]
Debt Instrument, Face Amount						$ 15,000
Third Eye Capital [Member] \| Revolving Notes Series B [Member]
Long-Term Debt							$ 58,500		$ 58,500
Debt Issuance Costs, Net							$ 800		$ 800
Third Eye Capital [Member] \| Revolving Notes Series B [Member] \| Prime Rate [Member]
Debt Instrument, Interest Rate, Stated Percentage							22.25%		22.25%
Debt Instrument, Basis Spread on Variable Rate		13.75%
Term Loan [Member] \| Third Eye Capital [Member]
Debt Instrument, Face Amount						7,200
Revenue Participation Term Notes [Member] \| Third Eye Capital [Member]
Debt Instrument, Face Amount						$ 10,000
Debt Instrument, Interest Rate, Stated Percentage							5.00%		5.00%
Revenue Participation Term Notes [Member] \| Third Eye Capital [Member] \| AAFK [Member]
Long-Term Debt							$ 12,200		$ 12,200
Debt Issuance Costs, Net							168		168
Amendment No 28 [Member] \| Third Eye Capital [Member]
Debt Instrument, Fee Amount										$ 100
Term Notes [Member] \| Third Eye Capital [Member]
Long-Term Debt							7,300		7,300
Debt Issuance Costs, Net							$ 104		$ 104
Debt Instrument, Interest Rate, Stated Percentage							14.00%		14.00%
Acquisition Term Notes [Member] \| Third Eye Capital [Member]
Long-Term Debt							$ 27,000		$ 27,000
Debt Issuance Costs, Net							325		325
Acquisition Term Notes [Member] \| Third Eye Capital [Member] \| Aemetis Facility Keyes, Inc. [Member]
Debt Instrument, Redemption Fee							$ 7,500		$ 7,500
Acquisition Term Notes [Member] \| Third Eye Capital [Member] \| Prime Rate [Member]
Debt Instrument, Interest Rate, Stated Percentage							19.25%		19.25%
Debt Instrument, Basis Spread on Variable Rate						10.75%
Reserve Liquidity Facility [Member] \| Third Eye Capital [Member]
Debt Instrument, Face Amount																$ 18,000
Long-Term Debt							$ 0		$ 0
Line of Credit Facility, Maximum Borrowing Capacity																$ 85,000
Debt Instrument, Non-refundable Standby Fee, Percent of Difference Between Principal Amount and the Commitment																2.00%
Dbet Instrument, Non Refundable One Time Fees																$ 500
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%
Fuels Revolving Line [Member] \| GAFI [Member]
Debt Issuance Costs, Net							1,800		1,800
Debt Instrument, Interest Rate, Stated Percentage					10.00%
Short-Term Debt							35,100		35,100
Fuels Revolving Line [Member] \| Prime Rate [Member] \| GAFI [Member]
Debt Instrument, Basis Spread on Variable Rate					6.00%
Carbon Revolving Line [Member] \| ACCI [Member]
Long-Term Debt							23,400		23,400
Debt Issuance Costs, Net							1,500		1,500
Debt Instrument, Interest Rate, Stated Percentage					8.00%
Short-Term Debt							300		300
Carbon Revolving Line [Member] \| Prime Rate [Member] \| ACCI [Member]
Debt Instrument, Basis Spread on Variable Rate					4.00%
Cilion Shareholder Seller Notes Payable [Member]
Debt Instrument, Face Amount						$ 5,000
Long-Term Debt							7,000		7,000
Debt Instrument, Interest Rate, Stated Percentage						3.00%
Debt, Long-Term and Short-Term, Combined Amount							7,081		7,081			7,028
Subordinated Notes [Member] \| AAFK [Member]
Debt Instrument, Fee Amount											$ 340							$ 3,400
Short-Term Debt							17,700		17,700			17,600
Debt Instrument Fee Rate																		10.00%
Debt Extension Fee, Percentage																		10.00%
EB5 Phase I Notes [Member]
Debt Instrument, Face Amount																			$ 500
Long-Term Debt							38,000		38,000			37,900
Debt Instrument, Convertible, Conversion Price (in dollars per share)																	$ 30
Debt Instrument, Amount Released From Escrow							35,500		35,500
Debt Instrument, Amount Remaining Funded to Escrow							500		500
Proceeds from Issuance of Debt									4,000
EB5 Phase I Notes [Member] \| Maximum [Member]
Debt Instrument, Additional Investment Available to Issue							200,000		200,000
EB5 Phase I Notes [Member] \| Minimum [Member]
Debt Instrument, Investment Raised Per Investor								$ 800							$ 500
EB5 Phase I Funding [Member] \| Maximum [Member]
Debt Instrument, Face Amount																			$ 36,000
EB5 Phase II Notes [Member]
Debt, Long-Term and Short-Term, Combined Amount							4,400		4,400			4,300
Secunderabad Oils [Member]
Debt Instrument, Interest Rate, Stated Percentage														18.00%
Short-Term Debt							4,000		4,000			3,800
Debt Agreement, Maximum Borrowing Capacity														$ 3,600
Leo Edibles & Fats Limited [Member]
Debt Agreement, Maximum Borrowing Capacity													$ 1,270
Construction Loan Agreement [Member]
Long-Term Debt							25,300		25,300			25,100
Debt Instrument, Interest Rate, Stated Percentage				9.25%
Short-Term Debt							43,894		43,894			41,024
Debt Agreement, Maximum Borrowing Capacity				$ 25,000
Construction Loan Agreement [Member] \| US Treasury (UST) Interest Rate [Member]
Debt Instrument, Basis Spread on Variable Rate				5.00%
Construction Loan Agreement 2 [Member]
Long-Term Debt							19,400		19,400			$ 16,800
Debt Issuance Costs, Net							800		800
Debt Instrument, Interest Rate, Stated Percentage	8.75%
Debt Agreement, Maximum Borrowing Capacity	$ 25,000
Construction Loan Agreement 2 [Member] \| US Treasury (UST) Interest Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	5.00%
Financing Agreement For Capital Expenditures [Member]
Debt Instrument, Face Amount							5,700		5,700
Short-Term Debt							2,200		2,200
Other Long-Term Debt, Noncurrent							$ 3,600		$ 3,600