Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	May 14, 2020
Document and Entity Information [Abstract]
Document Type	10-Q/A
Document Quarterly Report	true
Document Period End Date	Mar. 31, 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	true
Entity Central Index Key	0000911147
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2020
Amendment Description	The sole purpose of this Amendment No. 1 (the "Amendment") to the Quarterly Report on Form 10-Q of Century Casinos, Inc. (the "Company") for the quarterly period ended March 31, 2020 that was filed with the U.S. Securities and Exchange Commission (the "SEC") on May 20, 2020 (the "Form 10-Q") is to add this Explanatory Note, which was inadvertently omitted from the Form 10-Q. As previously disclosed in the Current Report on Form 8-K filed by the Company with the SEC on May 8, 2020, the filing of the Form 10-Q was delayed due to disruptions caused by the coronavirus ("COVID-19") pandemic. Between March 14, 2020 and March 17, 2020, the Company closed all of its casinos, hotels and other facilities to comply with quarantines issued by governments to contain the spread of COVID-19. The volatility in the Company's current and projected earnings triggered the need to conduct impairment assessments on its intangible and long-lived assets and goodwill. The uncertainty caused by COVID-19 complicated the analysis required in connection with such impairment assessments. The significant amount of additional time and resources needed to complete these assessments prevented the Company from filing the Form 10-Q by its May 11, 2020 due date. The Company relied on the SEC's Order Under Section 36 of the Securities Exchange Act of 1934 Modifying Exemptions From the Reporting and Proxy Delivery Requirements for Public Companies, dated March 25, 2020 (Release No. 34-88465), to delay the filing of the Form 10-Q. Pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), this Amendment No. 1 also contains new certifications of the Company's principal executive officers and principal financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Because no financial statements are included in this Amendment No. 1 and this Amendment No. 1 does not contain or amend any disclosure with respect to Items 307 or 308 of Regulation S-K promulgated by the SEC under the Exchange Act, paragraphs 3, 4 and 5 of the Section 302 certifications have been omitted. In addition, because no financial statements are included in this Amendment No. 1, new certifications of the Company's principal executive officers and principal financial officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 are not required to be included with this Amendment No. 1. This Amendment No. 1 does not modify or update in any way the disclosures contained in or exhibits filed or furnished with the Form 10-Q other than as set forth above.