FAIR VALUE OF FINANCIAL INSTRUMENTS - Non-Recurring Fair Value Measurements (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
Sep. 30, 2020 |
Jun. 30, 2020 |
Sep. 30, 2020 |
Dec. 31, 2019 |
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Impairment charge | $ 15,957 | $ 0 | ||
| Licensing Agreements | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Impairment charge | $ 11,800 | $ 4,100 | ||
| Impairment charges, net of tax | $ 8,700 | $ 3,000 | ||