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Note 5 - Debt (Details Textual) - USD ($) $ / shares in Units, $ in Thousands							1 Months Ended	12 Months Ended		89 Months Ended
	Mar. 12, 2025	Jul. 28, 2023	May 16, 2023	Oct. 04, 2022	Mar. 02, 2022	Jul. 06, 2012	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Mar. 31, 2024	Nov. 30, 2024	Jul. 31, 2024	Jul. 01, 2024	Mar. 31, 2023	Dec. 31, 2022	Aug. 01, 2022	Jul. 26, 2022	May 01, 2020	Feb. 27, 2019	Jan. 09, 2012
Long-Term Debt							$ 338,061	$ 338,061
Proceeds from Issuance of Debt								19,461	$ 75,482
Short-Term Debt							$ 26,789	$ 26,789	$ 23,443
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)							$ 11.7	$ 11.7	$ 11.7						$ 15.92
Warrants and Rights Outstanding, Term (Year)							4 years 9 months 10 days	4 years 9 months 10 days	5 years 9 months 7 days						7 years 5 months 23 days
Gain (Loss) on Extinguishment of Debt								$ 162	$ (0)
Debt, Long-Term and Short-Term, Combined Amount							$ 338,061	338,061	294,721
Long-Term Debt, Current Maturities							63,745	63,745	13,585
Long-Term Debt, Excluding Current Maturities							247,527	$ 247,527	257,693
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]								Selling, General and Administrative Expense
Mitsubishi Chemical America, Inc. (“MCA”) [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] \| Certain Equipment at the Keyes Plant [Member]
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent							9,600	$ 9,600
Disposal Group, Including Discontinued Operation, Long-term Debt, Current							3,600	3,600
Disposal Group, Including Discontinued Operation, Short-term Debt, Current							2,200	2,200
Disposal Group, Including Discontinued Operation, Accounts Payable, Current							200	200
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal								(3,600)
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
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] \| Chief Executive Officer [Member]
Amount Guaranteed by Related Party							10,000	10,000
Third Eye Capital [Member] \| Revolving Credit Facility [Member]
Debt Instrument, Face Amount						$ 18,000
Long-Term Debt							31,800	31,800
Debt Issuance Costs, Net							$ 400	$ 400
Debt Instrument, Interest Rate, Stated Percentage							21.25%	21.25%
Third Eye Capital [Member] \| Revolving Credit Facility [Member] \| Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate						13.75%
Third Eye Capital [Member] \| Acquisition Term Notes [Member]
Debt Instrument, Face Amount						$ 15,000
Revolving Notes Series B [Member] \| Revolving Credit Facility [Member]
Long-Term Debt							$ 68,900	$ 68,900
Debt Issuance Costs, Net							$ 400	$ 400
Debt Instrument, Interest Rate, Stated Percentage							21.25%	21.25%
Revolving Notes Series B [Member] \| Revolving Credit Facility [Member] \| Prime Rate [Member]
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%
Revenue Participation Term Notes [Member] \| Third Eye Capital [Member] \| AAFK [Member]
Long-Term Debt							$ 12,200	$ 12,200
Debt Issuance Costs, Net							43	43
Term Notes [Member] \| Third Eye Capital [Member]
Long-Term Debt							7,200	7,200
Debt Issuance Costs, Net							$ 29	$ 29
Debt Instrument, Interest Rate, Stated Percentage							14.00%	14.00%
Acquisition Term Notes [Member] \| Third Eye Capital [Member]
Long-Term Debt							$ 19,400	$ 19,400
Debt Issuance Costs, Net							$ 135	$ 135
Debt Instrument, Interest Rate, Stated Percentage							18.25%	18.25%
Debt Instrument, Redemption Fee							$ 7,500	$ 7,500
Acquisition Term Notes [Member] \| Third Eye Capital [Member] \| Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate						10.75%
Short Term Promissory Note [Member] \| Third Eye Capital [Member]
Debt Instrument, Interest Rate, Stated Percentage							20.50%	20.50%
Proceeds from Issuance of Debt							$ 2,000
Fuels Revolving Line [Member] \| GAFI [Member]
Debt Issuance Costs, Net							$ 400	$ 400
Debt Instrument, Interest Rate, Effective Percentage							13.50%	13.50%
Short-Term Debt							$ 41,700	$ 41,700
Fuels Revolving Line [Member] \| GAFI [Member] \| Subsequent Event [Member]
Debt Instrument, Basis Spread on Variable Rate	11.00%
Fuels Revolving Line [Member] \| GAFI [Member] \| Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage							10.00%	10.00%
Fuels Revolving Line [Member] \| GAFI [Member] \| Minimum [Member] \| Subsequent Event [Member]
Debt Instrument, Interest Rate, Stated Percentage	15.00%
Fuels Revolving Line [Member] \| Prime Rate [Member] \| GAFI [Member]
Debt Instrument, Basis Spread on Variable Rate					6.00%
Fuels Revolving Line [Member] \| Prime Rate [Member] \| GAFI [Member] \| Subsequent Event [Member]
Debt Instrument, Basis Spread on Variable Rate	11.00%
Carbon Revolving Line [Member] \| ACCI [Member]
Long-Term Debt							$ 24,900	$ 24,900
Debt Issuance Costs, Net							$ 1,100	$ 1,100
Debt Instrument, Interest Rate, Effective Percentage							11.50%	11.50%
Short-Term Debt							$ 2,500	$ 2,500
Carbon Revolving Line [Member] \| ACCI [Member] \| Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage							8.00%	8.00%
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							$ 7,200	$ 7,200
Debt Instrument, Interest Rate, Stated Percentage							3.00%	3.00%
Debt, Long-Term and Short-Term, Combined Amount							$ 7,242	$ 7,242	7,028
Subordinated Notes [Member] \| AAFK [Member]
Short-Term Debt							19,400	19,400	17,600
Debt Instrument, Fee Amount																				$ 3,400
Debt Instrument Fee Rate																				10.00%
Debt Extension Fee, Percentage																				10.00%
EB5 Phase I Notes [Member]
Debt Instrument, Convertible, Conversion Price (in dollars per share)																			$ 30
EB5 Phase I Notes [Member] \| Minimum [Member]
Debt Instrument, Investment Raised Per Investor														$ 800				$ 500
EB5 Phase I Notes [Member] \| Maximum [Member]
Debt Instrument, Additional Investment Available to Issue										$ 200,000
EB-5 Promissory Notes [Member]
Long-Term Debt							34,600	34,600	37,900
Proceeds from Issuance of Debt										$ 4,000
Debt Instrument, Interest Rate, Effective Percentage												1.00%
Gain (Loss) on Extinguishment of Debt								162
Debt, Long-Term and Short-Term, Combined Amount							39,020	39,020	42,211
EB5 Phase II Notes [Member]
Debt, Long-Term and Short-Term, Combined Amount							4,400	4,400	4,300
EB-5 Broker Promissory Note [Member]
Debt Instrument, Face Amount												$ 3,300
Long-Term Debt							0	0
Debt, Long-Term and Short-Term, Combined Amount							2,595	2,595	0
Long-Term Debt, Current Maturities							1,400	1,400
Long-Term Debt, Excluding Current Maturities									1,200
Secunderabad Oils [Member]
Debt Instrument, Interest Rate, Stated Percentage																	18.00%
Short-Term Debt							5,100	5,100	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							25,100	25,100	25,100
Debt Instrument, Interest Rate, Stated Percentage				9.25%
Debt, Long-Term and Short-Term, Combined Amount							48,235	48,235	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							23,900	23,900	16,800
Debt Issuance Costs, Net							800	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%
Jessup Land Acquisition Notes [Member]
Debt Instrument, Face Amount											$ 840
Long-Term Debt							$ 840	$ 840
Debt Instrument, Interest Rate, Stated Percentage											11.99%