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Convertible Senior Notes - Additional information (Details)
1 Months Ended 12 Months Ended
May 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
item
$ / shares
shares
Dec. 14, 2018
Debt Instrument [Line Items]      
Aggregate principal amount $ 115,000,000.0 $ 1,000  
Interest rate (as a percent) 3.00% 3.00%  
Underwriting discounts and commissions $ 3,700,000    
Common stock issued upon conversion of notes | shares   4,810,002  
Conversion rate   130  
Interest expense   $ 300,000  
Initial conversion price (in dollars per share) | $ / shares   $ 23.91  
Threshold maximum conversion rate   $ 48.10  
Debt issuance costs   $ 4,100,000  
Long-term Debt, Term   5 years  
Debt Instrument, Interest Rate, Stated Percentage   3.74%  
Notes payable, 2025   $ 115,000,000.0  
Threshold maximum combined interest rate (as a percent)   0.50%  
Cash payment to each noteholder (as a percent)   3.00%  
Senior Notes      
Debt Instrument [Line Items]      
Common stock issued upon conversion of notes | shares   4,810,002  
Initial conversion price (in dollars per share) | $ / shares   $ 41.8261  
Convertible Note [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Interest Rate, Stated Percentage     3.00%
Private Placement      
Debt Instrument [Line Items]      
Aggregate principal amount 15,000,000.0    
Proceeds from the offering 111,300,000    
Third-party offering related costs $ 300,000    
First 90 days beginning on, and including the date on which such Registration Default occurs      
Debt Instrument [Line Items]      
Threshold trading days for redemption of notes | item   20  
Additional interest rate (as a percent)   0.25%  
After 90 days of the occurrence of Registration Default      
Debt Instrument [Line Items]      
Threshold consecutive trading days for redemption of notes | item   30  
Additional interest rate (as a percent)   0.50%