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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2019 USD ($) item | Sep. 30, 2019 USD ($) | Jun. 30, 2020 item | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Basis Of Presentation [Line Items] |  |  |  |  |
Advertising costs included in selling, general and administrative expenses | $ |  |  |  | $ 4,200 | $ 3,800
Customer Loyalty Programs |  |  |  |  |
Basis Of Presentation [Line Items] |  |  |  |  |
Liabilities Based On Standalone Retail Value Included In Other Accrued Expenses | $ | $ 1,400 |  |  | 1,400 | $ 1,400
Sports Wagering Agreements |  |  |  |  |
Basis Of Presentation [Line Items] |  |  |  |  |
Revenue recognition term |  | 10 years |  |  |
Deferred revenues | $ | $ 5,990 | $ 6,000 |  | $ 5,990 |
Sports Wagering Agreements | INDIANA |  |  |  |  |
Basis Of Presentation [Line Items] |  |  |  |  |
Number of contracted mobile sports operators in operations | item | 1 |  |  |  |
Number of contracted mobile sports operators | item | 3 |  |  |  |
Number of contracted mobile sports operators expected to begin | item |  |  | 2 |  |

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