Long-Term Debt (Narrative) (Details) € in Millions, £ in Millions, zł in Millions, $ in Millions				3 Months Ended
		Apr. 25, 2019	Apr. 09, 2019 PLN (zł)	Mar. 31, 2019 CAD ($) item	Mar. 31, 2019 PLN (zł) item	Mar. 31, 2019 USD ($) item	Mar. 31, 2018 CAD ($)	Mar. 31, 2018 USD ($)	Jun. 30, 2019 CAD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 GBP (£)	Mar. 31, 2019 EUR (€)	Mar. 31, 2019 CAD ($)	Mar. 31, 2019 PLN (zł)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Aug. 31, 2017 GBP (£)	Sep. 30, 2016 CAD ($)	Aug. 31, 2014 CAD ($)	May 31, 2012 CAD ($)
Debt Instrument [Line Items]
Amortization of deferred financing costs						$ 30,000		$ 32,000
Amount outstanding															$ 68,249,000	$ 60,019,000
total debt															67,772,000	59,523,000
Principal payments						$ 54,000
Casinos Poland [Member]
Debt Instrument [Line Items]
Deposits or bank guarantees for payment of casino jackpots and gaming tax obligations under gaming law | zł														zł 4.8
Century Downs Racetrack And Casino [Member]
Debt Instrument [Line Items]
Options to Purchase Land | item				4	4	4
Principal payments						$ 0
Century Casino Bath [Member]
Debt Instrument [Line Items]
Line of credit facility											£ 1.8				$ 2,300,000		£ 2.0
Expiration date				Sep. 01, 2023	Sep. 01, 2023	Sep. 01, 2023
Guaranteed amount						$ 600,000
Century Casino Bath [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points				1.625%	1.625%	1.625%
Capital Lease - CDR [Member]
Debt Instrument [Line Items]
Amount outstanding	[1]															$ 188,000
BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity													$ 102.2					$ 69.2	$ 39.1	$ 28.0
Fixed Charge Coverage Ratio											1.00	1.00	1.00	1.00	1.00
Required minimum equity balance under debt covenant													$ 50.0
Required maximum capital expenditure limit under debt covenant				$ 5.5
Line of credit facility													64.2		$ 48,000,000
Line of credit facility amount available for borrowing													16.0		$ 12,000,000
Standby fees				$ 0.1			$ 0.1
Line of credit facility amount that cannot be reborrowed once repaid													88.1
BMO Credit Agreement [Member] | Measurement Input, EBITDA Multiple [Member]
Debt Instrument [Line Items]
EBITDA ratio															4.00
BMO Credit Agreement [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Notional amount													$ 6.2		$ 4,600,000
Exchange rate											3.92	3.92	3.92	3.92	3.92
Debt instrument maturity date				Aug. 01, 2019	Aug. 01, 2019	Aug. 01, 2019
BMO Credit Agreement [Member] | Interest Rate Swap Second Agreement [Member]
Debt Instrument [Line Items]
Notional amount													$ 6.2		$ 4,600,000
Exchange rate											3.89	3.89	3.89	3.89	3.89
Debt instrument maturity date				Aug. 01, 2019	Aug. 01, 2019	Aug. 01, 2019
BMO Credit Agreement [Member] | Interest Rate Swap Third Agreement [Member]
Debt Instrument [Line Items]
Notional amount													$ 11.3		$ 8,500,000
Exchange rate											4.08	4.08	4.08	4.08	4.08
Debt instrument maturity date				Dec. 01, 2021	Dec. 01, 2021	Dec. 01, 2021
BMO Credit Agreement [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Deposits maintained for payment of casino jackpots and gaming tax obligations														zł 1.4	$ 400,000
Line of Credit with mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł														5.0
Line of credit facility														4.1	1,100,000
Line of credit facility amount available for borrowing														0.9	200,000
Interest rate percentage points				1.40%	1.40%	1.40%
Line Of Credit With Alior Bank [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł														13.0
Line Of Credit With Alior Bank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Line of credit amount that can only be used to secure bank guarantees | zł					zł 2.0
Line of credit facility amount available for borrowing														10.2	2,700,000
Guaranteed amount					zł 2.8	$ 700,000
Interest rate percentage points				1.85%	1.85%	1.85%
Guarantee From mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Bank guarantee issued for payment of casino jackpots and gaming tax obligations														4.8	1,300,000
Deposits maintained for payment of casino jackpots and gaming tax obligations														zł 0.5	100,000
Credit Facility A [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Term of credit agreement				5 years	5 years	5 years
Line of credit facility													$ 1.1
Expiration date				Aug. 01, 2019	Aug. 01, 2019	Aug. 01, 2019
Line of credit facility amount available for borrowing													1.1		800,000
Credit Facility B [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Term of credit agreement				5 years	5 years	5 years
Line of credit facility													$ 24.1
Expiration date				Aug. 01, 2019	Aug. 01, 2019	Aug. 01, 2019
Line of credit facility amount available for borrowing															$ 0
Credit Facility B [Member] | BMO Credit Agreement [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Ownership acquired											33.30%	33.30%	33.30%	33.30%	33.30%
Credit Facility C [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Term of credit agreement				5 years	5 years	5 years
Line of credit facility													$ 11.0
Expiration date				Aug. 01, 2019	Aug. 01, 2019	Aug. 01, 2019
Line of credit facility amount available for borrowing													6.1		$ 4,600,000
Credit Facility D [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Term of credit agreement				5 years	5 years	5 years
Line of credit facility													30.0
Expiration date				Sep. 01, 2021	Sep. 01, 2021	Sep. 01, 2021
Line of credit facility amount available for borrowing															0
Credit Facility E [Member] | Treasury Risk Management Facility [Member]
Debt Instrument [Line Items]
Term of credit agreement				5 years	5 years	5 years
Line of credit facility													3.0		2,200,000
Credit Facility F [Member]
Debt Instrument [Line Items]
Line of credit facility													33.0
Expiration date				Aug. 24, 2019	Aug. 24, 2019	Aug. 24, 2019
Line of credit facility amount available for borrowing													8.8		6,600,000
Credit Facility G [Member]
Debt Instrument [Line Items]
Term of credit agreement				5 years	5 years	5 years
Credit Facility H [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Line of credit facility													2.0
Line of credit facility amount available for borrowing													$ 2.0		1,500,000
Credit Facility H [Member] | BMO Credit Agreement [Member] | Scenario, Forecast [Member]
Debt Instrument [Line Items]
Line of credit facility									$ 1.3	$ 1,000,000
Credit Agreement [Member] | Line of Credit with mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Expiration date		Mar. 30, 2020
Credit Agreement [Member] | Line Of Credit With Alior Bank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Line of credit amount that can only be used to secure bank guarantees | zł			zł 4.0
Expiration date			Apr. 16, 2021
Credit Agreement [Member] | Line Of Credit With Alior Bank [Member] | Casinos Poland [Member] | WIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points			1.55%
Credit Agreement Through April 2020 [Member] | Line Of Credit With Alior Bank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł			zł 13.0
Credit Agreement Through April 2021 [Member] | Line Of Credit With Alior Bank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł			zł 4.0
First Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł														zł 3.0
Expiration date				Nov. 01, 2021	Nov. 01, 2021	Nov. 01, 2021
Term of borrowing				3 years	3 years	3 years
Amount outstanding														3.0	800,000
Borrowing availability | zł					zł 0.0
Required amount to maintain in cash inflows and financial covenants | zł					zł 5.0
First Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member] | WIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points				1.70%	1.70%	1.70%
Second Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł														4.0
Expiration date				Nov. 01, 2021	Nov. 01, 2021	Nov. 01, 2021
Term of borrowing				3 years	3 years	3 years
Amount outstanding														4.0	1,000,000
Borrowing availability | zł					zł 0.0
Required amount to maintain in cash inflows and financial covenants | zł					zł 1.0
Second Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member] | WIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points				1.70%	1.70%	1.70%
Third Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł														2.5
Expiration date				Nov. 01, 2022	Nov. 01, 2022	Nov. 01, 2022
Term of borrowing				4 years	4 years	4 years
Amount outstanding														zł 1.5	400,000
Borrowing availability					zł 1.0	$ 300,000
Required amount to maintain in cash inflows and financial covenants | zł					zł 1.0
Third Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member] | WIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points				1.90%	1.90%	1.90%
UniCredit Agreement [Member]
Debt Instrument [Line Items]
Amount outstanding															0
UniCredit Agreement [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Line of credit facility												€ 7.0			$ 7,900,000
Line of credit facility secured amount | €												€ 7.0
UniCredit Agreement [Member] | Century Resorts Management [Member] | EURIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points				1.50%	1.50%	1.50%
UniCredit Agreement [Member] | Century Resorts Management [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points				1.50%	1.50%	1.50%
UniCredit Agreement Term 1 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing				1 month	1 month	1 month
UniCredit Agreement Term 2 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing				3 months	3 months	3 months
UniCredit Agreement Term 3 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing				6 months	6 months	6 months
UniCredit Agreement Term 4 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing				9 months	9 months	9 months
UniCredit Agreement Term 5 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing				12 months	12 months	12 months
Minimum [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Standby fees, percentage				0.50%	0.50%	0.50%
Minimum [Member] | First Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Profit margin				0.70%	0.70%	0.70%
Liquidity ratio											0.5	0.5	0.5	0.5	0.5
Minimum [Member] | Second Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Profit margin				0.50%	0.50%	0.50%
Liquidity ratio											1.2	1.2	1.2	1.2	1.2
Minimum [Member] | Third Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Profit margin				0.50%	0.50%	0.50%
Liquidity ratio											1.2	1.2	1.2	1.2	1.2
Maximum [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Standby fees, percentage				0.75%	0.75%	0.75%
Standby fees						$ 100,000		100,000
Amortization of deferred financing costs						$ 100,000		$ 100,000
Maximum [Member] | First Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Profit margin				1.00%	1.00%	1.00%
Liquidity ratio											1.3	1.3	1.3	1.3	1.3
Debt ratio											50	50	50	50	50
Maximum [Member] | Second Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Debt ratio											60	60	60	60	60
Maximum [Member] | Third Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Debt ratio											60	60	60	60	60
Century Downs Racetrack And Casino [Member]
Debt Instrument [Line Items]
Ownership percentage											75.00%	75.00%	75.00%	75.00%	75.00%
Outstanding balance on financing obligation													$ 19.5		$ 14,600,000

[1] See Note 2 and Note 11 for information related to the treatment of the Company's lease agreements after the adoption of ASU 2016-02 and related amendments.