Long-Term Debt (Narrative) (Details) € in Millions, £ in Millions, zł in Millions, $ in Millions		1 Months Ended	6 Months Ended
	Apr. 25, 2019	May 31, 2019 CAD ($)	Jun. 30, 2019 CAD ($) item	Jun. 30, 2019 PLN (zł) item	Jun. 30, 2019 USD ($) item	Jun. 30, 2018 CAD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 GBP (£) item	Jun. 30, 2019 EUR (€) item	Jun. 30, 2019 CAD ($) item	Jun. 30, 2019 PLN (zł) item	Jun. 30, 2019 USD ($) item	Apr. 09, 2019 PLN (zł)	Dec. 31, 2018 USD ($)	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					$ 56,000		$ 62,000
Amount outstanding												$ 72,468,000		$ 60,019,000
total debt												72,057,000		$ 59,523,000
Principal payments					$ 111,000
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
First option date			Jul. 01, 2023	Jul. 01, 2023	Jul. 01, 2023
Principal payments					$ 0
Century Casino Bath [Member]
Debt Instrument [Line Items]
Line of credit facility								£ 1.7				$ 2,200,000			£ 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%
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										68.8		$ 52,600,000
Line of credit facility amount available for borrowing										9.9		$ 7,600,000
Standby fees			$ 0.1			$ 0.1
Line of credit facility amount that cannot be reborrowed once repaid										94.4
Lease term		5 years
Lease		$ 1.4			$ 1,100,000
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										$ 5.9		$ 4,500,000
Exchange rate								4.64	4.64	4.64	4.64	4.64
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										$ 5.9		$ 4,500,000
Exchange rate								4.67	4.67	4.67	4.67	4.67
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										$ 10.9		$ 8,300,000
Exchange rate								4.83	4.83	4.83	4.83	4.83
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 amount available for borrowing											5.0	1,300,000
Interest rate percentage points			1.40%	1.40%	1.40%
Amount outstanding												0
Line Of Credit With Alior Bank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł											13.0
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											8.9	2,400,000
Guaranteed amount				zł 2.8	$ 700,000
Interest rate percentage points			1.55%	1.55%	1.55%
Amount outstanding											1.3	300,000
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			Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2021
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			Oct. 31, 2019	Oct. 31, 2019	Oct. 31, 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			Oct. 31, 2019	Oct. 31, 2019	Oct. 31, 2019
Line of credit facility amount available for borrowing										6.3		$ 4,800,000
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. 30, 2021	Sep. 30, 2021	Sep. 30, 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		2,300,000
Credit Facility F [Member]
Debt Instrument [Line Items]
Line of credit facility										33.0
Expiration date			Oct. 31, 2019	Oct. 31, 2019	Oct. 31, 2019
Line of credit facility amount available for borrowing										2.5		1,900,000
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										$ 0.6		$ 500,000
Credit Agreement [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Number of credit agreements | item								4	4	4	4	4
Credit Agreement [Member] | Line of Credit with mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Expiration date	Mar. 30, 2020
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											2.9	$ 800,000
Borrowing availability					$ 0
Required amount to maintain in cash inflows and financial covenants | zł				zł 1.0
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											3.9	1,000,000
Borrowing availability					$ 0
Required amount to maintain in cash inflows and financial covenants | zł				zł 7.0
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 2.4	600,000
Borrowing availability					$ 0
Required amount to maintain in cash inflows and financial covenants | zł				zł 7.0
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			$ 8,000,000
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]
Debt Instrument [Line Items]
Lease term								1 month	1 month	1 month	1 month	1 month
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			0.30%	0.30%	0.30%
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								0.6	0.6	0.6	0.6	0.6
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								0.6	0.6	0.6	0.6	0.6
Maximum [Member]
Debt Instrument [Line Items]
Lease term								28 years	28 years	28 years	28 years	28 years
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			0.40%	0.40%	0.40%
Liquidity ratio								1.3	1.3	1.3	1.3	1.3
Debt ratio								60	60	60	60	60
Maximum [Member] | Second Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Debt ratio								70	70	70	70	70
Maximum [Member] | Third Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Debt ratio								70	70	70	70	70
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		$ 14,900,000