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Accounting Policies (Tables)
 3 Months Ended 9 Months Ended
Oct. 31, 2022
Oct. 31, 2023
Oct. 31, 2022
Accounting Policies [Abstract]      
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block] The following tables show the effect of the retrospective change to the Consolidated Statements of Operations previously presented:
   Three Months Ended
October 31, 2022
          
   As Previously
Reported		  Effect of
Change		  As Currently
Reported
          
Cost of sales  $208,941  $2,063  $211,004
          
Gross profit  $11,336  $(2,063)  $9,273
          
Selling, general and administrative  $(7,886)  $2,063  $(5,823)
   The following tables show the effect of the retrospective change to the Consolidated Statements of Operations previously presented:
   Nine Months Ended
October 31, 2022
          
   As Previously
Reported		  Effect of
Change		  As Currently
Reported
          
Cost of sales  $615,001  $4,548  $619,549
          
Gross profit  $39,832  $(4,548)  $35,284
          
Selling, general and administrative  $(22,237)  $4,548  $(17,689)
Schedule of Inventory, Current [Table Text Block]   The components of inventory are as follows as of the dates presented (amounts in thousands):
   October 31,
2023		   January 31,
2023		 
           
Ethanol and other finished goods  $8,035   $12,695 
Work in process   5,697    10,194 
Corn and other raw materials   23,783    25,855 
Total  $37,515   $48,744