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Preferred Stock (Details) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
Jun. 30, 2020
Sep. 30, 2020
Dec. 31, 2019
Preferred Stock      
Par value per share   $ 0.01 $ 0.01
Beneficial conversion feature $ 24.1    
Subscription agreement      
Preferred Stock      
Conversion price $ 45.57    
Issued upon conversion (in shares) 10    
Series A Convertible      
Preferred Stock      
Preferred stock, shares issued   438,885 0
Series A Convertible | Subscription agreement      
Preferred Stock      
Preferred stock, shares issued 438,885    
Par value per share $ 0.01    
Share price (per share) $ 455.70    
Preferred stock, value $ 200.0