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OTHER ASSETS - Narrative (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Jun. 21, 2016
Interest And Other Income Member      
Other Investment Not Readily Marketable [Line Items]      
Realized gain on investment $ 27,300,000 $ 27,300,000  
Minimum      
Other Investment Not Readily Marketable [Line Items]      
Potential stock received upon conversion of investment (shares)     0
Prepaid Expenses and Other Current Assets      
Other Investment Not Readily Marketable [Line Items]      
Assigned value of preferred shares     $ 0