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Stockholders' Equity - Additional Information (Details)
 12 Months Ended
Feb. 05, 2021
$ / shares
shares
Oct. 01, 2020
USD ($)
item
$ / shares
shares
Jun. 24, 2019
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
$ / shares
shares
Oct. 31, 2019
shares
Class of Stock [Line Items]            
Common stock, shares authorized | shares       100,000,000 100,000,000  
Common stock, par value per share (in dollars per share) | $ / shares   $ 0.001   $ 0.001 $ 0.001  
Stock Issued During Period, Shares, Issued for Services | shares     562,500      
Preferred stock, par value per share (in dollars per share) | $ / shares       $ 0.001 $ 0.001  
Preferred stock, shares authorized | shares     4,312,500 2,500,000 2,500,000  
Shares issued, price per share (in dollars per share) | $ / shares     $ 17.00      
Proceeds from issuance of stock       $ 237,225,000 $ 0  
Common stock, par value per share (in dollars per share) | $ / shares   $ 0.001   $ 0.001 $ 0.001  
Proceeds from issuance of common stock, net of issuance costs       $ 28,160,000 $ 0  
Dividends, paid-in-kind       2,500,000    
Deemed dividend   $ 39,500,000        
Proceeds from public offering, net of offering costs     $ 68,800,000 $ 0 $ 68,811,000  
Common stock, shares issued | shares       39,837,058 37,339,787 15.0
Common stock issued upon conversion of notes | shares       4,810,002    
Warrants [Member]            
Class of Stock [Line Items]            
Common stock issued upon conversion of notes | shares       18,800,000    
Director [Member]            
Class of Stock [Line Items]            
Stock Issued During Period, Shares, Issued for Services | shares       2,869 5,753  
Stock Issued During Period, Value, Issued for Services       $ 82,700 $ 91,000  
Class A convertible preferred stock [Member]            
Class of Stock [Line Items]            
Preferred stock, par value per share (in dollars per share) | $ / shares       $ 0.001 $ 0.001  
Preferred stock, shares authorized | shares       800,000 800,000  
Class B convertible preferred stock [Member]            
Class of Stock [Line Items]            
Preferred stock, par value per share (in dollars per share) | $ / shares       $ 0.001 $ 0.001  
Preferred stock, shares authorized | shares       585,000 585,000  
Class C convertible preferred stock            
Class of Stock [Line Items]            
Preferred stock, par value per share (in dollars per share) | $ / shares       $ 0.001 $ 0.001  
Preferred stock, shares authorized | shares       250,000 250,000  
Dividends, paid-in-kind       $ 300,000    
Liquidation preference (in dollars per share) | $ / shares   $ 1,000        
Conversion price (in dollars per share) | $ / shares   $ 38.6152        
Conversion rate   25.90        
Shares to be issued upon conversion | shares   6,474,135        
Threshold trading days for conversion of preferred stock   20        
Threshold consecutive trading days for conversion of preferred stock   30        
Stock price trigger as a percentage of conversion price for conversion of preferred stock   150.00%        
Dividend rate on shares not repurchased   5.50%        
Number of member to the board of directors who can be elected by the preferred stock holders | item   1        
Percentage of stock to be held to exercise the right to nominate member of board of directors   66.67%        
Class C convertible preferred stock | Prior to the 180-day anniversary of October 1, 2020            
Class of Stock [Line Items]            
Number of shares to be redeemed | shares   50,000        
Redemption price (as a percent)   125.00%        
Class C convertible preferred stock | At any time beginning five years after Closing Date (but prior to six years after the Closing Date)            
Class of Stock [Line Items]            
Redemption price (as a percent)   105.00%        
Class C convertible preferred stock | At any time beginning six years after Closing Date            
Class of Stock [Line Items]            
Redemption price (as a percent)   100.00%        
Private Placement            
Class of Stock [Line Items]            
Proceeds from issuance of common stock, net of issuance costs   $ 25,000,000.0        
Aggregate purchase price   275,000,000.0        
Reimbursement of transactional expenses   1,000,000.0        
Net proceeds from private placement   265,400,000        
Direct and incremental expenses   $ 8,600,000        
Private Placement | Class C convertible preferred stock            
Class of Stock [Line Items]            
Shares issued (in shares) | shares   250,000        
Preferred stock, dividend rate (as a percent)   4.00%        
Preferred stock, par value per share (in dollars per share) | $ / shares   $ 0.001        
Shares issued, price per share (in dollars per share) | $ / shares   $ 1,000        
Proceeds from issuance of stock   $ 250.0        
Net proceeds from private placement   $ 28,200,000        
Private Placement | Common Stock [Member]            
Class of Stock [Line Items]            
Shares issued (in shares) | shares   675,536        
Net proceeds from private placement   $ 237,200,000        
Subsequent Event | Class C convertible preferred stock            
Class of Stock [Line Items]            
Shares issued (in shares) | shares 50,000          
Liquidation preference (in dollars per share) | $ / shares $ 1,000          
Subsequent Event | Class C convertible preferred stock | Prior to the 180-day anniversary of October 1, 2020            
Class of Stock [Line Items]            
Number of shares to be redeemed | shares 50,000          
Subsequent Event | Common Stock [Member]            
Class of Stock [Line Items]            
Common stock, par value per share (in dollars per share) | $ / shares $ 0.001          
Common stock, par value per share (in dollars per share) | $ / shares 0.001          
Conversion price (in dollars per share) | $ / shares $ 38.6152          
Shares to be issued upon conversion | shares 1,312,860