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Equity - Changes in Series B Preferred Stock (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Increase (Decrease) in Temporary Equity [Roll Forward]      
Series B Preferred Stock, outstanding, beginning (in shares) 0    
Series B Preferred Stock, outstanding, ending (in shares) 100,000 0  
Series B Preferred Stock, outstanding, beginning $ 0    
Deemed dividends 32,028    
Series B Preferred Stock, outstanding, ending $ 91,568 $ 0  
Convertible preferred stock Series B      
Increase (Decrease) in Temporary Equity [Roll Forward]      
Series B Preferred Stock, outstanding, beginning (in shares) 0    
Issuance of Series B Preferred Stock (in shares) 100,000    
Series B Preferred Stock, outstanding, ending (in shares) 100,000 0  
Series B Preferred Stock, outstanding, beginning $ 0    
Issuance of Series B Preferred Stock 59,540    
Deemed dividends 32,028 $ 0 $ 0
Series B Preferred Stock, outstanding, ending $ 91,568 $ 0