Quarterly report pursuant to Section 13 or 15(d)

Available-for-Sale Securities - Summary of Available-For-Sale Securities Recorded in Cash and Cash Equivalents or Marketable Securities (Details)

v3.20.2
Available-for-Sale Securities - Summary of Available-For-Sale Securities Recorded in Cash and Cash Equivalents or Marketable Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost $ 147,859  
Fair Value 147,959  
Fair Value, Measurements, Recurring    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost 147,859 $ 77,955
Unrealized Gains 102 32
Unrealized Losses (2) (1)
Fair Value 147,959 77,986
Fair Value, Measurements, Recurring | Money Market Funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost 10,838 14,731
Fair Value 10,838 14,731
Fair Value, Measurements, Recurring | U.S. Treasury Securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost 96,757 5,285
Unrealized Gains 29 1
Unrealized Losses (2) (1)
Fair Value 96,784 5,285
Fair Value, Measurements, Recurring | Commercial paper    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost 21,972 15,174
Unrealized Gains 26 12
Fair Value 21,998 15,186
Fair Value, Measurements, Recurring | Corporate debt securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost 13,892 17,168
Unrealized Gains 44 3
Fair Value 13,936 17,171
Fair Value, Measurements, Recurring | U.S. agency bonds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost 4,400 25,597
Unrealized Gains 3 16
Fair Value $ 4,403 $ 25,613