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Preferred Stock and Stockholders' Equity - Carrying Value Roll Forward (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2021
USD ($)
Series D Preferred Stock  
Increase (Decrease) in Temporary Equity [Roll Forward]  
Beginning balance $ 0
Proceeds from issuance of shares, net of issuance costs 61,793
Fair value of 2021 Warrants issued (14,839)
Recognition of bifurcated embedded derivative (282)
Accrual of in-kind dividends 2,123
Amortization 274
Ending balance 49,069
Series B Preferred Stock  
Increase (Decrease) in Temporary Equity [Roll Forward]  
Beginning balance 105,086
Accrual of in-kind dividends 14,008
Amortization 335
Redemption (119,429)
Ending balance $ 0