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Preferred Stock - Summary of Preferred Equity Balance (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Increase (Decrease) in Temporary Equity [Roll Forward]    
Beginning balance $ 90,015 $ 90,758
Repurchase of Series A Preferred Stock (2,667) (727)
Accumulated dividends on Series A Preferred Stock (60) (16)
Ending balance $ 87,288 $ 90,015