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INVESTMENT IN AND RECEIVABLE FROM NEW MEADOWLANDS RACETRACK (Details) - USD ($) |  |  |  |  | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 07, 2017 | Apr. 25, 2014 | Nov. 19, 2013 | Mar. 12, 2013 | Apr. 03, 2021 | Dec. 31, 2015 | Oct. 03, 2020 | Jul. 13, 2016
New Meadowlands Racetrack LLC |  |  |  |  |  |  |  |
INVESTMENT IN NEW MEADOWLANDS RACETRACK (Details) [Line Items] |  |  |  |  |  |  |  |
Payments to acquire businesses |  |  |  | $ 4,200,000 |  |  |  |
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 |  |  |  |  |  |  |  |
INVESTMENT IN NEW MEADOWLANDS RACETRACK (Details) [Line Items] |  |  |  |  |  |  |  |
Ownership percentage |  |  | 11.60% | 63.70% |  |  |  |
Loans to related party |  | $ 1,500,000 |  |  |  |  |  |
Interest rate |  | 3.00% |  |  |  |  |  |
Loan maturity date |  | Jan. 31, 2024 |  |  |  |  |  |
Additional loan |  |  |  |  |  |  |  | $ 200,000
Principal and accrued interest |  |  |  |  | $ 1,793,000 |  | $ 1,766,000 |
Ark Meadowlands LLC |  |  |  |  |  |  |  |
INVESTMENT IN NEW MEADOWLANDS RACETRACK (Details) [Line Items] |  |  |  |  |  |  |  |
Ownership percentage by parent |  |  |  |  | 97.00% |  |  |
Profit participation percentage |  |  |  |  | 5.00% |  |  |

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