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v3.25.3

Note 13 - Segment Information (Details Textual) gal in Millions, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) gal | Sep. 30, 2024 USD ($)
Number of Reportable Segments |  |  | 3 |
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] |  |  |  |
Cost, Overhead | $ | $ 5.0 | $ 4.7 | $ 15.3 | $ 15.7
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 |  |
Concentration Risk, Percentage | 99.50% | 97.00% |  |
California Ethanol [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Ethanol Sales, Wet Distillers Grain and Corn Oil Sales [Member] | Customer One [Member] |  |  |  |
Concentration Risk, Percentage |  |  | 99.40% | 98.60%
India Biodiesel [Member] |  |  |  |
GallonPerYear (Gallon) |  |  | 80 |
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] |  |  |  |
Number of Major Customers |  | 3 | 4 | 3
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Customer One [Member] |  |  |  |
Concentration Risk, Percentage | 42.00% | 40.00% | 35.00% | 41.00%
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Customer Two [Member] |  |  |  |
Concentration Risk, Percentage | 28.00% | 29.00% | 23.00% | 33.00%
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Customer Three [Member] |  |  |  |
Concentration Risk, Percentage | 26.00% | 28.00% | 23.00% | 21.00%
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Customer Four [Member] |  |  |  |
Concentration Risk, Percentage |  |  | 14.00% |
India Biodiesel [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Biodiesel Sales [Member] |  |  |  |
Number of Major Customers | 3 |  |  |

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