Document And Entity Information - USD ($)

12 Months Ended

Jan. 31, 2021

Apr. 09, 2021

Jul. 31, 2020

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

5,992,002

Entity Public Float

$ 722,957

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, 2021

Document Fiscal Year Focus

2020

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

Document Transition Report

false