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Stockholders' Equity - Common Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended
Mar. 31, 2021
Feb. 29, 2020
Mar. 31, 2021
Mar. 31, 2020
Oct. 02, 2020
Sale of stock          
Commission percentage 3.00%        
2020 Shelf Registration Statement          
Sale of stock          
Aggregate amount of securities issuable         $ 200,000
At-the-market sales          
Sale of stock          
Proceeds from issuance of common stock in public offering, net of offering costs     $ 409    
Proceeds from Issuance of Common Stock     $ 409    
At-the-market sales | Common Stock          
Sale of stock          
Issuance of common stock (in shares)     520,937    
Public offering          
Sale of stock          
Proceeds from issuance of common stock in public offering, net of offering costs       $ 48,434  
Proceeds from Issuance of Common Stock       $ 48,434  
Public offering | Common Stock          
Sale of stock          
Issuance of common stock (in shares)   17,250,000   17,250,000  
Share price (in dollars per share)   $ 3.00      
Proceeds from issuance of common stock in public offering, net of offering costs   $ 48,400      
Proceeds from Issuance of Common Stock   $ 48,400      
At The Market Offering          
Sale of stock          
Proceeds from issuance of common stock in public offering, net of offering costs $ 400   $ 1,000    
Gross Proceeds 50,000        
Proceeds from Issuance of Common Stock $ 400   $ 1,000