Document And Entity Information
| Document And Entity Information | Aug. 04, 2021 |
| Document Information [Line Items] | |
| Entity, Registrant Name | CKX LANDS, INC. |
| Document, Type | 8-K/A |
| Document, Period End Date | Aug. 4, 2021 |
| Entity, Incorporation, State or Country Code | LA |
| Entity, File Number | 1-31905 |
| Entity, Tax Identification Number | 72-0144530 |
| Entity, Address, Address Line One | One Lakeside Plaza, 4th Floor |
| Entity, Address, Address Line Two | 127 West Broad Street |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock with no par value |
| Trading Symbol | CKX |
| Security Exchange Name | NYSEAMER |
| Entity, Emerging Growth Company | false |
| Amendment Description | Form 8-K/A date of report 08-04-21 |
| Amendment Flag | true |
| Entity, Central Index Key | 0000352955 |