Fair Value Measurements and Fair Value of Financial Instruments - Unrealized Gain (Loss) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	$ 369,956	$ 427,647
Unrealized Gains	227	40
Unrealized Losses	(419)	(1,291)
Fair Value	369,764	426,396
Total cash equivalents
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	29,179	53,208
Unrealized Gains	2	0
Unrealized Losses	0	0
Fair Value	29,181	53,208
Total investments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	340,777	374,439
Unrealized Gains	225	40
Unrealized Losses	(419)	(1,291)
Fair Value	340,583	373,188
Money market funds | Total cash equivalents
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	22,646	53,208
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	22,646	53,208
U.S. Treasury securities | Total cash equivalents
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	4,984
Unrealized Gains	1
Unrealized Losses	0
Fair Value	4,985
U.S. Treasury securities | Total investments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	225,517	228,563
Unrealized Gains	55	25
Unrealized Losses	(392)	(896)
Fair Value	225,180	227,692
U.S. Non-Treasury securities | Total investments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	11,904	10,699
Unrealized Gains	2	6
Unrealized Losses	(5)	(3)
Fair Value	11,901	10,702
Commercial paper | Total investments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	18,166	55,561
Unrealized Gains	26	3
Unrealized Losses	(6)	(131)
Fair Value	18,186	55,433
Corporate debt securities | Total cash equivalents
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	1,549
Unrealized Gains	1
Unrealized Losses	0
Fair Value	1,550
Corporate debt securities | Total investments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized Cost Basis	85,190	79,616
Unrealized Gains	142	6
Unrealized Losses	(16)	(261)
Fair Value	$ 85,316	$ 79,361