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Accounting Policies (Tables)
6 Months Ended
Jul. 31, 2021
Accounting Policies [Abstract]  
Schedule of Inventory, Current [Table Text Block] The components of inventory are as follows as of the dates presented (amounts in thousands):
   July 31,
2021
   January 31,
2021
 
           
Ethanol and other finished goods  $15,986   $18,346 
Work in process   6,451    4,374 
Grain and other raw materials   19,322    15,160 
Total  $41,759   $37,880