Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Liability for horseracing purses	$ 886	$ 1,139
Accrued payroll	1,715	1,897
Accrued redeemable points	271	167
Liability to NYSGC	1,507	360
Liability for local progressive jackpot	1,110	907
Accrued settlement liability	0	758
Accrued settlement liability	71,712	41,933
Accrued professional fees	744	308
Federal tax withholding payable	0	78
Accrued other	1,087	1,733
Total accrued expenses and other current liabilities	$ 7,320	$ 7,347