Cooperative Marketing Agreement (Narrative) (Details) - USD ($)		3 Months Ended				9 Months Ended
	Jul. 30, 2015	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Obligation under the Agreement to enhance purses for live horse racing meet due current			$ 6,700,000		$ 6,200,000
Obligation under Agreement to support joint marketing activities due current						$ 1,197,000	$ 944,000
Other revenue		$ 2,347,464		$ 2,190,060		4,801,471	4,545,952
Advertising and marketing expense		1,012,905		774,296		1,950,611	1,683,603
Depreciation		$ 672,465		$ 567,190		1,866,975	1,738,900
Stock based compensation expense						179,141	224,921
Proceeds from sale of RV Park							99,441
Cooperative Marketing Agreement (CMA) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other revenue						610,000	800,000
Advertising and marketing expense						440,000	630,000
Depreciation						170,000	170,000
Shakopee Valley RV Park [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from sale of RV Park	$ 100,000
Stock Appreciation Rights (SARs) [Member] | Cooperative Marketing Agreement (CMA) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other operating expense related to stock appreciation rights						$ 0	$ 142,000