Fair Value Measurements - Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	$ 48,928	$ 32,965
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	131,158	205,065
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(55)	0
Fair Value	131,103	205,065
Cash Equivalents	82,175	172,100
Marketable Securities	48,928	32,965
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	77,191	155,551
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	77,191	155,551
Cash Equivalents	77,191	155,551
Marketable Securities	0	0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	77,191	155,551
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	77,191	155,551
Cash Equivalents	77,191	155,551
Marketable Securities	0	0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	53,967	49,514
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(55)	0
Fair Value	53,912	49,514
Cash Equivalents	4,984	16,549
Marketable Securities	48,928	32,965
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	18,701	49,514
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	18,701	49,514
Cash Equivalents	0	16,549
Marketable Securities	18,701	$ 32,965
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	35,266
Gross Unrealized Gains	0
Gross Unrealized Losses	(55)
Fair Value	35,211
Cash Equivalents	4,984
Marketable Securities	$ 30,227