Fair Value Measurements and Fair Value of Financial Instruments - Unrealized Gain (Loss) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	$ 394,328	$ 427,647
Unrealized Gains	9	40
Unrealized Losses	(1,541)	(1,291)
Fair Value	392,796	426,396
Total cash equivalents
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	53,185	53,208
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	53,185	53,208
Total cash equivalents | Money market funds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	53,185	53,208
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	53,185	53,208
Total investments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	341,143	374,439
Unrealized Gains	9	40
Unrealized Losses	(1,541)	(1,291)
Fair Value	339,611	373,188
Total investments | U.S. Treasury securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	229,551	228,563
Unrealized Gains	6	25
Unrealized Losses	(1,275)	(896)
Fair Value	228,282	227,692
Total investments | U.S. Non-Treasury securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	22,654	10,699
Unrealized Gains	0	6
Unrealized Losses	(62)	(3)
Fair Value	22,592	10,702
Total investments | Commercial paper
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	48,356	55,561
Unrealized Gains	0	3
Unrealized Losses	(56)	(131)
Fair Value	48,300	55,433
Total investments | Corporate debt securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	40,582	79,616
Unrealized Gains	3	6
Unrealized Losses	(148)	(261)
Fair Value	$ 40,437	$ 79,361