Significant Accounting Policies (Disaggregation of company revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Net operating revenue	$ 39,648	$ 37,330	$ 80,270	$ 73,729
Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	1,274	1,060	2,134	2,251
Canada [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	15,331	14,040	30,004	27,202
United States [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	8,476	7,943	16,183	15,443
Poland [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	14,567	14,287	31,949	28,833
Gaming [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	32,605	33,412	66,612	65,900
Gaming [Member] | Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	1,109	718	1,877	1,435
Gaming [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	10,105	9,750	19,852	18,771
Gaming [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	7,022	8,587	13,441	16,787
Gaming [Member] | Poland [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	14,369	14,357	31,442	28,907
Hotel [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	505	494	959	932
Hotel [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	132	134	268	271
Hotel [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	373	360	691	661
Food And Beverage [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	3,781	3,413	7,340	6,754
Food And Beverage [Member] | Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	102		102
Food And Beverage [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	2,533	2,328	5,022	4,675
Food And Beverage [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	985	908	1,870	1,738
Food And Beverage [Member] | Poland [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	161	177	346	341
Other [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	2,757	2,582	5,359	5,156
Other [Member] | Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	63	371	155	845
Other [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	2,561	2,104	4,862	4,037
Other [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	96	96	181	173
Other [Member] | Poland [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	$ 37	11	$ 161	101
Promotional Allowances [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue		(2,571)		(5,013)
Promotional Allowances [Member] | Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue		(29)		(29)
Promotional Allowances [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue		(276)		(552)
Promotional Allowances [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue		(2,008)		(3,916)
Promotional Allowances [Member] | Poland [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue		$ (258)		$ (516)