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STOCKHOLDER'S EQUITY - Successor Common Stock and Special Warrants (Details) - $ / shares
Jun. 30, 2020
Dec. 31, 2019
Class of Stock [Line Items]    
Common stock, shares authorized (in shares) 2,100,000,000  
Common stock, shares issued (in shares) 146,370,948  
Class A Common Stock    
Class of Stock [Line Items]    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 1,000,000,000 1,000,000,000
Common stock, shares issued (in shares) 61,432,341 57,776,204
Class B Common Stock    
Class of Stock [Line Items]    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 1,000,000,000 1,000,000,000
Common stock, shares issued (in shares) 6,900,195 6,904,910
Special Warrants    
Class of Stock [Line Items]    
Common stock, shares issued (in shares) 78,038,412 81,046,593