| Document and Entity Information | Dec. 28, 2020 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 28, 2020 |
| Entity Registrant Name | CENTURY CASINOS, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 0-22900 |
| Entity Tax Identification Number | 84-1271317 |
| Entity Address, Address Line One | 455 E. Pikes Peak Ave. |
| Entity Address, Address Line Two | Suite 210 |
| Entity Address, City or Town | Colorado Springs |
| Entity Address, State or Province | CO |
| Entity Address, Postal Zip Code | 80903 |
| City Area Code | 719 |
| Local Phone Number | 527-8300 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 Per Share Par Value |
| Trading Symbol | CNTY |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000911147 |
| Amendment Flag | false |
