v3.26.3
Note 13 - Segment Information (Details Textual)
gal in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
gal
Sep. 30, 2025
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
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 90.90% 99.50% 90.10% 99.40%
India Biodiesel Segment [Member]        
GallonPerYear (Gallon)     80  
India Biodiesel Segment [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member]        
Number of Major Customers 2 3 3 4
India Biodiesel Segment [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Customer One [Member]        
Concentration Risk, Percentage 11.00% 26.00% 16.00% 14.00%
India Biodiesel Segment [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Customer Two [Member]        
Concentration Risk, Percentage 58.00% 28.00% 17.00% 23.00%
India Biodiesel Segment [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Customer Three [Member]        
Concentration Risk, Percentage   42.00% 46.00% 23.00%
India Biodiesel Segment [Member] | Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Customer Four [Member]        
Concentration Risk, Percentage       35.00%