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RISKS AND UNCERTAINTIES Narrative (Details)
gal in Millions
1 Months Ended 12 Months Ended
Oct. 31, 2018
Oct. 31, 2019
USD ($)
Dec. 19, 2019
gal
Conventional Ethanol      
Concentration Risk      
Renewable volume requirements     15,000
Advanced Biofuels      
Concentration Risk      
Renewable volume requirements     5,090
Cellulosic Ethanol      
Concentration Risk      
Renewable volume requirements     590
Renewable Fuels      
Concentration Risk      
Renewable volume requirements     20,090
Percentage mandatory renewable fuel volumes are reduced   20.00%  
Number of consecutive years | $   2  
Threshold percentage 20.00%    
Minimum | Renewable Fuels      
Concentration Risk      
Statutory renewable volume requirement     30,000
Minimum | Total revenues | Product | Ethanol      
Concentration Risk      
Concentration percentage   75.00%  
Minimum | Cost of goods sold | Product | Corn      
Concentration Risk      
Concentration percentage   65.00%  
Maximum | Total revenues | Product | Ethanol      
Concentration Risk      
Concentration percentage   90.00%  
Maximum | Cost of goods sold | Product | Corn      
Concentration Risk      
Concentration percentage   85.00%