Cash Equivalents And Marketable Securities - Summarizes the Unrealized Gains and Losses in Fair Value of the Company's Investments in Debt Securities (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Marketable Securities [Line Items]
Amortized Cost	$ 178,670,000	$ 113,913,000
Unrealized Gains	8,000	1,000
Unrealized Losses	(150,000)	(225,000)
Estimated Fair Value	178,528,000	113,689,000
Money Market Funds
Marketable Securities [Line Items]
Amortized Cost	31,396,000	42,495,000
Unrealized Gains	0	0
Unrealized Losses	0	0
Estimated Fair Value	31,396,000	42,495,000
US Government Bonds [Member]
Marketable Securities [Line Items]
Amortized Cost	147,274,000	71,418,000
Unrealized Gains	8,000	1,000
Unrealized Losses	(150,000)	(225,000)
Estimated Fair Value	$ 147,132,000	$ 71,194,000