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SUBSEQUENT EVENTS (Narrative) (Details)					3 Months Ended		6 Months Ended	9 Months Ended	12 Months Ended
	Nov. 07, 2023	Apr. 21, 2023 USD ($)	Apr. 01, 2023 USD ($) $ / shares shares	Mar. 08, 2023 D	Mar. 31, 2023 USD ($) $ / shares shares	Mar. 31, 2022 USD ($) $ / shares shares	Jun. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Feb. 14, 2023	Jul. 29, 2021 USD ($)
Subsequent Event [Line Items]
Number of days notice for repurchase if put interest for cash | D				30
Repurchase of common stock value | $					$ 1,324,000	$ 10,000	$ 24,669,000	$ 26,486,000	$ 26,543,000
RVAEH
Subsequent Event [Line Items]
Percentage of ownership of equity interest excluding interest in entity										50.00%
Churchill Downs Incorporated [Member] | RVAEH
Subsequent Event [Line Items]
Percentage of ownership of equity interest excluding interest in entity										50.00%
RVA Entertainment Holdings [Member] | Host Community Agreement [Member]
Subsequent Event [Line Items]
Upfront payment | $											$ 26,000,000
Stock options
Subsequent Event [Line Items]
Stock options to purchase common stock					439,429
Number of options vested in period					463,497	16,795
MGM National Harbor [Member]
Subsequent Event [Line Items]
Percentage of ownership of equity interest excluding interest in entity				100.00%
Common Class D [Member]
Subsequent Event [Line Items]
Shares repurchased					824
Repurchase of common stock value | $					$ 3,000
Repurchase of common stock price per share | $ / shares					$ 3.99
Common Class D [Member] | Stock options
Subsequent Event [Line Items]
Stock options to purchase common stock					439,429	6,887
Stock Vest Tax Repurchase [Member] | Common Class D [Member]
Subsequent Event [Line Items]
Shares repurchased					255,618	2,649
Repurchase of common stock value | $					$ 1,300,000	$ 10,000
Repurchase of common stock price per share | $ / shares					$ 5.17	$ 3.63
Subsequent events | RVA Entertainment Holdings [Member] | Host Community Agreement [Member]
Subsequent Event [Line Items]
Percentage of escrowed funds anticipates to receive	50.00%
Subsequent events | MGM National Harbor [Member]
Subsequent Event [Line Items]
Proceeds from sale of available for sale debt securities | $		$ 136,800,000
Subsequent events | Common Class D [Member] | Restricted Stock Awards [Member]
Subsequent Event [Line Items]
Number of restricted stock that vested upon grant			0
Subsequent events | Common Class D [Member] | Employees Stock Option [Member]
Subsequent Event [Line Items]
Number of share options that vested upon grant			0
Subsequent events | Common Class D [Member] | Executive officer and management personnel | Stock options
Subsequent Event [Line Items]
Stock issued during period, shares, restricted stock award, net of forfeitures			153,996
Stock options to purchase common stock			218,308
Subsequent events | Stock Vest Tax Repurchase [Member] | Common Class D [Member]
Subsequent Event [Line Items]
Shares repurchased			56,830
Repurchase of common stock value | $			$ 306,000
Repurchase of common stock price per share | $ / shares			$ 5.54

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