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STOCKHOLDER'S EQUITY (DEFICIT) - Narrative (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
May 05, 2020
right
May 01, 2019
$ / shares
Mar. 31, 2020
USD ($)
shares
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
Class of Stock [Line Items]          
Share-based compensation expense | $     $ 4,625 $ 392  
Unrecognized compensation cost | $         $ 52,700
Unrecognized compensation cost, weighted average period (in years)         3 years 2 months 12 days
Special Warrants          
Class of Stock [Line Items]          
Special warrants, exercise price per share (in dollars per share) | $ / shares   $ 0.001      
Special warrants, conversion terms, ownership percentage of common stock   4.99%      
Special warrants, conversion terms, ownership percentage of capital stock or voting interests   22.50%      
Common Shares | Class A Shares          
Class of Stock [Line Items]          
Conversion of Special Warrants and Class B Shares to Class A Shares (in shares) | shares [1]     2,132,506    
Common Shares | Class B Shares          
Class of Stock [Line Items]          
Conversion of Special Warrants and Class B Shares to Class A Shares (in shares) | shares [1]     (5,299)    
Common Shares | Special Warrants          
Class of Stock [Line Items]          
Conversion of Special Warrants and Class B Shares to Class A Shares (in shares) | shares [1]     (2,127,207)    
Corporate Expenses          
Class of Stock [Line Items]          
Share-based compensation expense | $     $ 4,600 $ 400  
Subsequent Event          
Class of Stock [Line Items]          
Number of rights declared for each share of common stock | right 1        
Beneficial ownership acquired (as a percent) 10.00%        
Beneficial ownership acquired by passive investor (as a percent) 20.00%        
[1] The Successor Company's Preferred Stock is not presented in the data above as there were no shares issued and outstanding in 2020.