Fair Value Measurements - Summary of Fair Value Hierarchy for Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Investments:
Investments	$ 68,971	$ 111,199
Fair Value, Measurements, Recurring [Member]
Investments:
Investments	135,693	185,520
Fair Value, Measurements, Recurring [Member] | Money Market Funds [Member]
Cash equivalents:
Cash equivalents	54,233	70,322
Commercial Paper [Member]
Investments:
Investments		6,250
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member]
Cash equivalents:
Cash equivalents	12,489	3,999
Investments:
Investments		6,250
Corporate Bonds [Member]
Investments:
Investments	11,992	40,095
Corporate Bonds [Member] | Fair Value, Measurements, Recurring [Member]
Investments:
Investments	11,992	40,095
US Government Agencies Debt Securities [Member]
Investments:
Investments	56,979	64,854
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Investments:
Investments	56,979	64,854
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Investments:
Investments	54,233	70,322
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Money Market Funds [Member]
Cash equivalents:
Cash equivalents	54,233	70,322
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Investments:
Investments	81,460	115,198
Level 2 [Member] | Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member]
Cash equivalents:
Cash equivalents	12,489	3,999
Investments:
Investments		6,250
Level 2 [Member] | Corporate Bonds [Member] | Fair Value, Measurements, Recurring [Member]
Investments:
Investments	11,992	40,095
Level 2 [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Investments:
Investments	$ 56,979	$ 64,854