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Debt - Share Lending Agreement (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Oct. 15, 2019
Debt Instrument [Line Items]      
Common stock outstanding (in shares) 71,957,885 71,502,206  
Affiliated Entity | Jefferies Capital Services LLC      
Debt Instrument [Line Items]      
Commons stock available to affiliate (in shares)     3,582,880
Common stock outstanding (in shares) 3,600,000    
Outstanding loaned shares $ 7,800    
Nominal fee per borrowed share $ 30    
Shares subject to become issued and outstanding in case of restructuring proceedings (in shares) 3,600,000