Marketable Securities And Fair Value Measurements - Summary of assets measured at fair value on a recurring basis (Detail) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Marketable securities:
Marketable securities	$ 166,682
Total	200,808
Level 1
Marketable securities:
Total	1,285
Level 2
Marketable securities:
Total	199,523
Level 3
Marketable securities:
Total	0
Money Market Funds
Cash equivalents:
Cash equivalents	1,285	$ 259,609
Money Market Funds | Level 1
Cash equivalents:
Cash equivalents	1,285	259,609
Money Market Funds | Level 2
Cash equivalents:
Cash equivalents	0	0
Money Market Funds | Level 3
Cash equivalents:
Cash equivalents	0	$ 0
Commercial paper
Marketable securities:
Marketable securities	9,992
Commercial paper | Level 1
Marketable securities:
Marketable securities	0
Commercial paper | Level 2
Marketable securities:
Marketable securities	9,992
Commercial paper | Level 3
Marketable securities:
Marketable securities	0
U.S. treasury securities
Cash equivalents:
Cash equivalents	32,841
Marketable securities:
Marketable securities	156,690
U.S. treasury securities | Level 1
Cash equivalents:
Cash equivalents	0
Marketable securities:
Marketable securities	0
U.S. treasury securities | Level 2
Cash equivalents:
Cash equivalents	32,841
Marketable securities:
Marketable securities	156,690
U.S. treasury securities | Level 3
Cash equivalents:
Cash equivalents	0
Marketable securities:
Marketable securities	$ 0