Condensed Consolidated Statements Of Equity - USD ($) $ in Thousands		Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	[2]	Retained Earnings [Member]	Total Century Casinos, Inc. Shareholders' Equity [Member]	Noncontrolling Interests [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	[2]	Noncontrolling Interests [Member]	Total
BALANCE at Dec. 31, 2018		$ 294	$ 114,214	$ (14,243)			$ 76,056				$ 7,062
Performance stock unit issuance		1
Net earnings (loss)							985				2,143	$ 3,128
Foreign currency translation adjustment				1,159							(290)	869
Amortization of stock-based compensation	[1]		979
Distribution to non-controlling interest											(989)
Changes in non-controlling interest	[2]										(607)
Exercise of options			157
BALANCE at Sep. 30, 2019		$ 295	115,350	(13,084)	$ (232)		76,809	$ 179,370	$ (49)		7,270	186,640
Common shares issued		31,148
BALANCE at Jun. 30, 2019		$ 294	114,880	(10,826)			76,327				7,393
Performance stock unit issuance		1
Net earnings (loss)							482				565	1,047
Foreign currency translation adjustment				(2,258)							(480)	(2,738)
Amortization of stock-based compensation	[1]		358
Changes in non-controlling interest	[2]										(208)
Exercise of options			112
BALANCE at Sep. 30, 2019		$ 295	115,350	(13,084)	$ (232)		76,809	179,370	$ (49)		7,270	186,640
Common shares issued		22,148
BALANCE at Dec. 31, 2019		$ 295	115,784	(9,442)			56,669				8,769	$ 172,075
BALANCE, Shares at Dec. 31, 2019												29,500,327
Performance stock unit issuance		1
Net earnings (loss)							(54,715)				(188)	$ (54,903)
Foreign currency translation adjustment				(4,085)							(262)	(4,347)
Amortization of stock-based compensation	[1]		589
Distribution to non-controlling interest											(158)
BALANCE at Sep. 30, 2020		$ 296	116,373	(13,527)			1,954	105,096			8,161	$ 113,257
BALANCE, Shares at Sep. 30, 2020												29,575,962
Common shares issued		75,635
BALANCE at Jun. 30, 2020		$ 296	116,019	(16,639)			(1,794)				7,714
Net earnings (loss)							3,748				208	$ 3,956
Foreign currency translation adjustment				3,112							239	3,351
Amortization of stock-based compensation	[1]		354
BALANCE at Sep. 30, 2020		$ 296	$ 116,373	$ (13,527)			$ 1,954	$ 105,096			$ 8,161	$ 113,257
BALANCE, Shares at Sep. 30, 2020												29,575,962

[1] Includes forfeiture credit for cancelled shares.

[2] Cumulative effect of accounting change relates to the adoption of Accounting Standards Update 2016-02. See Note 13 to the unaudited condensed consolidated financial statements for further details on the adoption of this accounting standard.