INVESTMENT IN NEW MEADOWLANDS RACETRACK (Details) - USD ($)				1 Months Ended	9 Months Ended	12 Months Ended
	Feb. 07, 2017	Nov. 19, 2013	Mar. 12, 2013	Apr. 25, 2014	Jul. 01, 2017	Dec. 31, 2015	Oct. 01, 2016	Jul. 13, 2016
New Meadowlands Racetrack LLC [Member]
INVESTMENT IN NEW MEADOWLANDS RACETRACK (Details) [Line Items]
Payments to Acquire Businesses and Interest in Affiliates			$ 4,200,000
Cost Method Investments Ownership Percentage		7.40%
Payments to Acquire Additional Interest in Subsidiaries	$ 222,000	$ 464,000				$ 222,000
Long-term Investments					$ 5,108,000
Meadowlands Newmark LLC [Member]
INVESTMENT IN NEW MEADOWLANDS RACETRACK (Details) [Line Items]
Cost Method Investments Ownership Percentage		11.60%	63.70%
Loans and Advances to Related party				$ 1,500,000
Interest Rate on Loan				3.00%
Loan Maturity Date				Jan. 31, 2024
Additional Loans And Advances To Related Party								$ 200,000
Principal and Accrued Interest Included in Other Assets					$ 1,858,000		$ 1,815,000
Ark Meadowlands LLC [Member]
INVESTMENT IN NEW MEADOWLANDS RACETRACK (Details) [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent					97.00%
Profit Participation Percentage					5.00%
Maximum Loss Relating to V I E Included In Other Current Assets					$ 231,000		$ 164,000