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Note 5 - Inventories (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

September 30,

  

December 31,

 
  

2021

  

2020

 

Raw materials

        
Corn $237  $ 

Enzymes and other inputs

  171   133 
Nutrients  1   

1

 
Palladium  267   235 
Work in process  55   5 

Finished goods

        
Isobutanol  36    
SAF, Isooctane and Isooctene  211   756 

Spare parts

  1,363   1,361 
         

Total inventories

 $2,341  $2,491