| Document And Entity Information | Aug. 21, 2023 |
| Document Information [Line Items] | |
| Entity, Registrant Name | CKX LANDS, INC. |
| Document, Type | 8-K |
| Document, Period End Date | Aug. 21, 2023 |
| Entity, Incorporation, State or Country Code | LA |
| Entity, File Number | 1-31905 |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock |
| Trading Symbol | CKX |
| Security Exchange Name | NYSE |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0000352955 |
