Cooperative Marketing Agreement (Narrative) (Details)			3 Months Ended				9 Months Ended
	Jul. 30, 2015 USD ($)	Jun. 14, 2012 $ / shares shares	Sep. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Sep. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Sep. 30, 2015 USD ($) item shares	Sep. 30, 2014 USD ($)
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				$ 6,200,000		$ 5,300,000
Amount received under agreement for joint marketing activities				$ 944,000		$ 660,000
Revenues related to marketing payment							$ 800,000	$ 711,000
Advertising and marketing expenses related to marketing payment							630,000	551,000
Depreciation related to marketing payment							$ 170,000	160,000
Number of parties | item							2
Stock based compensation expense			$ 64,000		$ 62,000
Expense recorded as an offset to revenue			16,851,658		$ 15,046,958		$ 41,580,773	38,206,126
Gain on disposal of assets			$ 347,348				347,348
Proceeds from sale of RV Park							$ 99,441
Shakopee Valley RV Park [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Gain on disposal of assets	$ 347,000
Proceeds from sale of RV Park	$ 100,000
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, other than options granted | shares		165,000
Benefit from appreciation in the value of common stock, per share | $ / shares		$ 14.30
Number of shares of stock each right represents | shares		1
Percentage of the Rights vested		10.00%
Number of the Rights vested | shares		16,500
Number of remaining Rights vest per year | shares		16,500
Stock based compensation expense							$ 142,000	80,000
Expense recorded as an offset to revenue							$ 142,000	$ 80,000