XML 12 R1.htm IDEA: XBRL DOCUMENT v3.22.1
Document And Entity Information - USD ($)
 12 Months Ended
Jan. 31, 2022
Apr. 05, 2022
Jul. 31, 2021
Document Information Line Items      
Entity Registrant Name REX AMERICAN RESOURCES CORPORATION    
Trading Symbol REX    
Document Type 10-K    
Current Fiscal Year End Date --01-31    
Entity Common Stock, Shares Outstanding   5,920,351  
Entity Public Float     $ 432,166,213
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 Jan. 31, 2022    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
ICFR Auditor Attestation Flag true    
Document Annual Report true    
Entity File Number 001-09097    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 31-1095548    
Entity Address, Address Line One 7720 Paragon Road    
Entity Address, City or Town Dayton    
Entity Address, State or Province OH    
Entity Address, Postal Zip Code 45459    
City Area Code 937    
Local Phone Number 276-3931    
Title of 12(b) Security Common Stock, $.01 par value    
Security Exchange Name NYSE    
Entity Interactive Data Current Yes    
Documents Incorporated by Reference [Text Block]

Documents Incorporated by Reference

    
Auditor Name Deloitte and Touche LLP    
Auditor Location Dayton, Ohio    
Auditor Firm ID 34    
Document Transition Report false