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Schedule II - VALUATION AND QUALIFYING ACCOUNTS
12 Months Ended
Jan. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
REX AMERICAN RESOURCES CORPORATION AND SUBSIDIARIES
               
Schedule II - VALUATION AND QUALIFYING ACCOUNTS        
FOR THE YEARS ENDED JANUARY 31, 2020, 2019 AND 2018        
(Amounts in thousands)              

      Additions  Deductions   
   Balance
Beginning
of Year
  Charged to
Cost and
Expenses
  Charges for
Which Reserves
Were Created
  Balance
End
of Year
2020:                    
  Deferred tax valuation allowance  $232   $—     $—     $232 
2019:                    
  Deferred tax valuation allowance  $241   $—     $9   $232 
2018:                    
  Deferred tax valuation allowance  $417   $—     $176   $241