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Convertible Senior Notes - Additional information (Details)
1 Months Ended 9 Months Ended
May 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
item
$ / shares
shares
Debt Instrument [Line Items]    
Aggregate principal amount $ 115,000,000.0  
Interest rate (as a percent) 3.00%  
Underwriting discounts and commissions $ 3,700,000  
Common stock issued upon conversion of notes | shares   4,810,002
Conversion rate   41.8261
Interest expense   $ 1,200,000
Initial conversion price (in dollars per share) | $ / shares   $ 23.91
Threshold maximum conversion rate   $ 48.10
Threshold percentage of stock trigger for redemption of notes   $ 130
Threshold trading days for redemption of notes | item   20
Threshold consecutive trading days for redemption of notes | item   30
Percentage of aggregate principal amount held by the note holders, liable to declare the principal amount of the Notes to be due and payable immediately by notice to the Company   $ 25
Debt issuance costs   $ 4,100,000
Long-term Debt, Term   5 years
Debt Instrument, Interest Rate, Effective Percentage   3.74%
Threshold maximum combined interest rate (as a percent)   $ 0.50
Cash payment to each noteholder (as a percent)   3
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 $ 345,200  
First 90 days beginning on, and including the date on which such Registration Default occurs    
Debt Instrument [Line Items]    
Additional interest rate (as a percent)   0.25
After 90 days of the occurrence of Registration Default    
Debt Instrument [Line Items]    
Additional interest rate (as a percent)   $ 0.50