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Equity - Changes in Series B Preferred Stock (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Increase (Decrease) in Temporary Equity [Roll Forward]    
Series B Preferred Stock, outstanding, beginning (in shares)   100,000
Series B Preferred Stock, outstanding, beginning   $ 91,568
Deemed dividends $ 464 $ 926
Series B Preferred Stock, outstanding, ending (in shares) 100,000 100,000
Series B Preferred Stock, outstanding, ending $ 92,494 $ 92,494
Series B Convertible Preferred Stock    
Increase (Decrease) in Temporary Equity [Roll Forward]    
Series B Preferred Stock, outstanding, beginning (in shares) 100,000 100,000
Series B Preferred Stock, outstanding, beginning $ 92,030 $ 91,568
Deemed dividends $ 464 $ 926
Series B Preferred Stock, outstanding, ending (in shares) 100,000 100,000
Series B Preferred Stock, outstanding, ending $ 92,494 $ 92,494