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Note 13 - Segment Information (Details Textual) gal in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 gal | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Number of Reportable Segments | 3 |  |  |
California Ethanol [Member] |  |  |  |
GallonPerYear (Gallon) | 65 |  |  |
California Ethanol [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Ethanol Sales, Wet Distillers Grain and Corn Oil Sales [Member] |  |  |  |
Number of Major Customers | 1 | 1 | 1 | 1
Concentration Risk, Percentage | 97.00% | 99.70% | 98.60% | 99.70%
India Biodiesel [Member] |  |  |  |
GallonPerYear (Gallon) | 60 |  |  |
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Biodiesel Sales [Member] | Customer One [Member] |  |  |  |
Concentration Risk, Percentage | 40.00% | 42.00% | 41.00% | 43.00%
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Biodiesel Sales [Member] | Customer Two [Member] |  |  |  |
Concentration Risk, Percentage | 29.00% | 35.00% | 33.00% | 28.00%
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Biodiesel Sales [Member] | Customer Three [Member] |  |  |  |
Concentration Risk, Percentage | 28.00% | 19.00% | 21.00% | 24.00%

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