Fair Value Measurements - Summary of Fair Value Hierarchy for Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Investments:
Investments	$ 94,809	$ 111,199
Fair Value, Measurements, Recurring [Member]
Investments:
Investments	185,553
Fair Value, Measurements, Recurring [Member] | Money Market Funds [Member]
Cash equivalents:
Cash equivalents	86,994	70,322
Commercial Paper [Member]
Investments:
Investments		6,250
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member]
Cash equivalents:
Cash equivalents	750	3,999
Investments:
Investments		6,250
Corporate Bonds [Member]
Investments:
Investments	21,598	40,095
Corporate Bonds [Member] | Fair Value, Measurements, Recurring [Member]
Investments:
Investments	21,598	40,095
Certificates of Deposit [Member] | Fair Value, Measurements, Recurring [Member]
Investments:
Investments		185,520
US Government Agencies Debt Securities [Member]
Investments:
Investments	73,211	64,854
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Cash equivalents:
Cash equivalents	3,000
Investments:
Investments	73,211	64,854
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Investments:
Investments	86,994	70,322
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Money Market Funds [Member]
Cash equivalents:
Cash equivalents	86,994	70,322
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Investments:
Investments	98,559
Level 2 [Member] | Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member]
Cash equivalents:
Cash equivalents	750	3,999
Investments:
Investments		6,250
Level 2 [Member] | Corporate Bonds [Member] | Fair Value, Measurements, Recurring [Member]
Investments:
Investments	21,598	40,095
Level 2 [Member] | Certificates of Deposit [Member] | Fair Value, Measurements, Recurring [Member]
Investments:
Investments		115,198
Level 2 [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Cash equivalents:
Cash equivalents	3,000
Investments:
Investments	$ 73,211	$ 64,854