Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2020	Aug. 03, 2020
Document And Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2020
Document Transition Report	false
Entity File Number	0-22900
Entity Registrant Name	CENTURY CASINOS, INC.
Entity Incorporation, State or Country Code	DE
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
Title of 12(b) Security	Common Stock, $0.01 Per Share Par Value
Trading Symbol	CNTY
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		29,575,962
Amendment Flag	false
Entity Central Index Key	0000911147
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2020