Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 218,690	$ 254,045
Level 1 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Amortized Cost	283,741	319,051
Gross unrealized losses	(1,548)	(326)
Total Fair Value	282,193	318,725
Level 1 [Member] | Fair Value, Recurring [Member] | Long-Term Investments - U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	24,974	65,106
Gross unrealized losses	(756)	(326)
Fair Value	24,218	64,780
Level 1 [Member] | Fair Value, Recurring [Member] | Short-Term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	40,077
Gross unrealized losses	(792)
Fair Value	39,285
Level 1 [Member] | Fair Value, Recurring [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	218,690	253,945
Asset	$ 218,690	$ 253,945