XML 36 R1.htm IDEA: XBRL DOCUMENT v2.4.1.9
Document And Entity Information (USD $)
 12 Months Ended
Dec. 31, 2014
Mar. 20, 2015
Jun. 30, 2014
Entity Registrant Name CKX LANDS, INC.    
Entity Central Index Key 0000352955    
Current Fiscal Year End Date --12-31    
Entity Filer Category Smaller Reporting Company    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Common Stock, Shares Outstanding (in shares)   1,942,495dei_EntityCommonStockSharesOutstanding  
Entity Public Float     $ 23,383,640dei_EntityPublicFloat
Document Type 10-K    
Document Period End Date Dec. 31, 2014    
Document Fiscal Year Focus 2014    
Document Fiscal Period Focus FY    
Amendment Flag false