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Subsequent Events (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 22, 2020
Nov. 11, 2020
Sep. 30, 2020
Sep. 30, 2020
Purchase Agreement        
Subsequent Event [Line Items]        
Issuance of common stock (in shares) 285,714     3,882,160
Purchase Agreement | Lincoln Park        
Subsequent Event [Line Items]        
Issuance of common stock (in shares)     3,000,000.0  
Aggregate net proceeds on sales of shares of common stock     $ 3,300  
Subsequent Event | At-the-Market Equity Offerings        
Subsequent Event [Line Items]        
Issuance of common stock (in shares)   3,987,485    
Aggregate net proceeds on sales of shares of common stock   $ 4,100    
Subsequent Event | Purchase Agreement | Lincoln Park        
Subsequent Event [Line Items]        
Issuance of common stock (in shares)   400,000    
Aggregate net proceeds on sales of shares of common stock   $ 400