Fair Value Measurements and Fair Value of Financial Instruments - Financial Assets Measured at Fair Value On a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value	$ 440,937	$ 493,260
Money market funds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value		232,813
U.S. Treasury securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets measured at fair value		260,447
Fair Value, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	68,069	232,813
Total investments	372,868	260,447
Total assets measured at fair value	440,937	493,260
Fair Value, Recurring | Money market funds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	55,155	232,813
Fair Value, Recurring | Commercial paper
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	3,976
Total investments	61,585
Fair Value, Recurring | Corporate debt securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	8,938
Total investments	73,712
Fair Value, Recurring | U.S. Treasury securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total investments	237,571	260,447
Level 1 | Fair Value, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	55,155	232,813
Total investments	0	0
Total assets measured at fair value	55,155	232,813
Level 1 | Fair Value, Recurring | Money market funds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	55,155	232,813
Level 1 | Fair Value, Recurring | Commercial paper
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	0
Total investments	0
Level 1 | Fair Value, Recurring | Corporate debt securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	0
Total investments	0
Level 1 | Fair Value, Recurring | U.S. Treasury securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total investments	0	0
Level 2 | Fair Value, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	12,914	0
Total investments	372,868	260,447
Total assets measured at fair value	385,782	260,447
Level 2 | Fair Value, Recurring | Money market funds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	0	0
Level 2 | Fair Value, Recurring | Commercial paper
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	3,976
Total investments	61,585
Level 2 | Fair Value, Recurring | Corporate debt securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	8,938
Total investments	73,712
Level 2 | Fair Value, Recurring | U.S. Treasury securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total investments	237,571	260,447
Level 3 | Fair Value, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	0	0
Total investments	0	0
Total assets measured at fair value	0	0
Level 3 | Fair Value, Recurring | Money market funds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	0	0
Level 3 | Fair Value, Recurring | Commercial paper
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	0
Total investments	0
Level 3 | Fair Value, Recurring | Corporate debt securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total cash equivalents	0
Total investments	0
Level 3 | Fair Value, Recurring | U.S. Treasury securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total investments	$ 0	$ 0