Document And Entity Information - shares	3 Months Ended
	Apr. 30, 2023	May 25, 2023
Document Information Line Items
Entity Registrant Name	REX AMERICAN RESOURCES CORPORATION
Trading Symbol	REX
Document Type	10-Q
Current Fiscal Year End Date	--01-31
Entity Common Stock, Shares Outstanding		17,390,019
Amendment Flag	false
Entity Central Index Key	0000744187
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Document Period End Date	Apr. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Document Quarterly Report	true
Document Transition Report	false
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, $0.01 par value
Security Exchange Name	NYSE
Entity Interactive Data Current	Yes