Summarized Quarterly Data (Unaudited) - Income Statement (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended							6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Net revenues	$ 59,948,000	$ 49,136,000	$ 33,522,000					$ 82,658,000	$ 142,606,000	$ 194,845,000	$ 65,851,000	$ 67,454,000
Selling, general and administrative	19,585,000	16,780,000	13,181,000					29,961,000	49,546,000	68,518,000	18,498,000	22,414,000
Total operating costs and expenses	77,669,000	71,361,000	57,510,000					128,871,000	206,540,000	283,909,000	95,768,000	91,137,000
Loss from operations	(17,721,000)	(22,225,000)	(23,988,000)	$ (9,887,000)	$ (6,844,000)	$ (6,830,000)	$ (6,356,000)	(46,213,000)	(63,934,000)	(89,064,000)	(29,917,000)	(23,683,000)
Other expense	345,000	132,000	225,000					93,000	438,000	561,000	0	0
Interest expense										(49,835,000)	(19,269,000)	(524,000)
Interest income										873,000	2,842,000	10,000
Loss before income taxes	(33,892,000)	(36,997,000)	(26,233,000)					(63,230,000)	(97,122,000)	(138,587,000)	(46,344,000)	(24,197,000)
Income tax provision									0		0	0
Net loss	(33,892,000)	(36,997,000)	(26,233,000)	$ (12,105,000)	$ (10,872,000)	$ (11,916,000)	$ (11,451,000)	(63,230,000)	(97,122,000)	(138,696,000)	(46,344,000)	(24,197,000)
Dividends on preferred stock									(96,000)	(128,000)	(128,000)	(168,000)
Net loss applicable to common stockholders	$ (33,924,000)	$ (37,029,000)	$ (26,265,000)					$ (63,294,000)	$ (97,218,000)	$ (138,824,000)	$ (46,472,000)	$ (24,365,000)
Weighted average common shares outstanding, basic (shares)	32,689	32,663	32,538					32,601	32,653	32,882	30,981	28,221
Weighted average common shares outstanding, diluted (shares)	32,689	32,663	32,538					32,601	32,653	32,882	30,981	28,221
Loss per common share, basic (usd per share)	$ (1.04)	$ (1.13)	$ (0.81)	$ (0.39)	$ (0.35)	$ (0.39)	$ (0.37)	$ (1.94)	$ (2.98)	$ (4.22)	$ (1.50)	$ (0.86)
Loss per common share, diluted (usd per share)	$ (1.04)	$ (1.13)	$ (0.81)	$ (0.39)	$ (0.35)	$ (0.39)	$ (0.37)	$ (1.94)	$ (2.98)	$ (4.22)	$ (1.50)	$ (0.86)
Unrealized gain (loss) on Interest Rate Cap	$ (39,000)	$ (72,000)	$ (115,000)					$ (187,000)	$ (226,000)	$ (96,000)	$ 315,000	$ 0
Comprehensive loss	(33,853,000)	(36,925,000)	(26,118,000)					(63,043,000)	(96,896,000)	(138,600,000)	(46,659,000)	(24,197,000)
Development Projects										12,574,000	21,558,000	12,970,000
Amortization of gaming license										5,784,000	0	0
Depreciation										28,993,000	1,517,000	1,341,000
Scenario, Previously Reported
Condensed Financial Statements, Captions [Line Items]
Net revenues	59,948,000	49,136,000	33,522,000					82,658,000	142,606,000
Selling, general and administrative	19,754,000	16,949,000	8,084,000					25,033,000	44,787,000
Total operating costs and expenses	77,838,000	71,530,000	52,413,000					123,943,000	201,781,000
Loss from operations	(17,890,000)	(22,394,000)	(18,891,000)					(41,285,000)	(59,175,000)
Other expense	0	0	0					0	0
Loss before income taxes	(33,716,000)	(37,298,000)	(20,911,000)					(58,209,000)	(91,925,000)
Income tax provision									0
Net loss	(33,716,000)	(37,298,000)	(20,911,000)					(58,209,000)	(91,925,000)
Dividends on preferred stock									(96,000)
Net loss applicable to common stockholders	$ (33,748,000)	$ (37,330,000)	$ (20,943,000)					$ (58,273,000)	$ (92,021,000)
Weighted average common shares outstanding, basic (shares)	32,689	32,663	32,538					32,601	32,653
Weighted average common shares outstanding, diluted (shares)	32,689	32,663	32,538					32,601	32,653
Loss per common share, basic (usd per share)	$ (1.03)	$ (1.14)	$ (0.64)					$ (1.79)	$ (2.82)
Loss per common share, diluted (usd per share)	$ (1.03)	$ (1.14)	$ (0.64)					$ (1.79)	$ (2.82)
Unrealized gain (loss) on Interest Rate Cap	$ (39,000)	$ (72,000)	$ (115,000)					$ (187,000)	$ (226,000)
Comprehensive loss	(33,677,000)	(37,226,000)	(20,796,000)					(58,022,000)	(91,699,000)
Restatement Adjustment
Condensed Financial Statements, Captions [Line Items]
Net revenues		0	0					0	0
Selling, general and administrative	(169,000)	(169,000)	5,097,000					4,928,000	4,759,000
Total operating costs and expenses	(169,000)	(169,000)	5,097,000					4,928,000	4,759,000
Loss from operations	169,000	169,000	(5,097,000)					(4,928,000)	(4,759,000)
Other expense	345,000	132,000	225,000					93,000	438,000
Loss before income taxes	(176,000)	301,000	(5,322,000)					(5,021,000)	(5,197,000)
Income tax provision									0
Net loss	(176,000)	301,000	(5,322,000)					(5,021,000)	(5,197,000)
Dividends on preferred stock									0
Net loss applicable to common stockholders	$ (176,000)	$ 301,000	$ (5,322,000)					$ (5,021,000)	$ (5,197,000)
Weighted average common shares outstanding, basic (shares)	0	0	0					0	0
Weighted average common shares outstanding, diluted (shares)	0	0	0					0	0
Loss per common share, basic (usd per share)	$ (0.01)	$ 0.01	$ (0.16)					$ (0.15)	$ (0.16)
Loss per common share, diluted (usd per share)	$ (0.01)	$ 0.01	$ (0.16)					$ (0.15)	$ (0.16)
Unrealized gain (loss) on Interest Rate Cap	$ 0	$ 0	$ 0					$ 0	$ 0
Comprehensive loss	$ (176,000)	$ 301,000	$ (5,322,000)					$ (5,021,000)	$ (5,197,000)
Gaming
Condensed Financial Statements, Captions [Line Items]
Cost of goods and services sold										126,186,000	44,486,000	44,238,000
Racing
Condensed Financial Statements, Captions [Line Items]
Cost of goods and services sold										8,049,000	5,229,000	5,174,000
Food and beverage
Condensed Financial Statements, Captions [Line Items]
Cost of goods and services sold										25,453,000	4,221,000	4,732,000
Room
Condensed Financial Statements, Captions [Line Items]
Cost of goods and services sold										8,161,000	0	0
Other
Condensed Financial Statements, Captions [Line Items]
Other										$ 191,000	$ 259,000	$ 268,000