Fair Value Measurement and Marketable Securities - Schedule of Financial Assets Measured and Recognized at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities, amortized cost	$ 276,729	$ 216,541
Marketable securities, gross unrealized gains	8	21
Marketable securities, gross unrealized losses	(720)	(14)
Marketable securities, estimated fair value	276,017	216,548
Amortized Cost	368,554	283,606
Estimated Fair Value	367,842	283,613
U.S. Government Securities | Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities, amortized cost	122,657	80,020
Marketable securities, gross unrealized gains	0	10
Marketable securities, gross unrealized losses	(592)	0
Marketable securities, estimated fair value	122,065	80,030
Corporate Bonds | Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities, amortized cost	76,628	72,573
Marketable securities, gross unrealized gains	8	11
Marketable securities, gross unrealized losses	(127)	(14)
Marketable securities, estimated fair value	76,509	72,570
Commercial Paper | Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities, amortized cost	77,444	63,948
Marketable securities, gross unrealized gains	0	0
Marketable securities, gross unrealized losses	(1)	0
Marketable securities, estimated fair value	77,443	63,948
Money Market Funds | Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Money market funds, amortized Cost	91,825	67,065
Money market funds, estimated Fair Value	$ 91,825	$ 67,065