XML 10 R1.htm IDEA: XBRL DOCUMENT v3.8.0.1
Document And Entity Information - shares
 3 Months Ended
Apr. 30, 2018
Jun. 01, 2018
Document and Entity Information [Abstract]    
Entity Registrant Name REX AMERICAN RESOURCES Corp  
Document Type 10-Q  
Current Fiscal Year End Date --01-31  
Entity Common Stock, Shares Outstanding   6,433,744
Amendment Flag false  
Entity Central Index Key 0000744187  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Filer Category Accelerated Filer  
Entity Well-known Seasoned Issuer No  
Document Period End Date Apr. 30, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q1