XML 9 R1.htm IDEA: XBRL DOCUMENT v3.22.1
Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2021
Mar. 28, 2022
Jun. 30, 2021
Document Information [Line Items]      
Entity Central Index Key 0000352955    
Entity Registrant Name CKX LANDS, INC.    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2021    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
Document Transition Report false    
Entity File Number 1-31905    
Entity Incorporation, State or Country Code LA    
Entity Tax Identification Number 72-0144530    
Entity Address, Address Line One 2417 Shell Beach Drive    
Entity Address, City or Town Lake Charles    
Entity Address, State or Province LA    
Entity Address, Postal Zip Code 70601    
City Area Code 337    
Local Phone Number 493-2399    
Title of 12(b) Security Common Stock with no par value    
Trading Symbol CKX    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Entity Shell Company false    
Entity Public Float     $ 17,094,488
Entity Common Stock, Shares Outstanding   1,942,495  
Auditor Name MaloneBailey, LLP    
Auditor Location Houston, Texas    
Auditor Firm ID 206