Fair Value Measurements - Schedule of Short Term Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 54,008	$ 73,970
Unrealized (Loss) Gain	(84)	(187)
Market Value	53,924	73,783
United States Treasury Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	9,857	15,868
Unrealized (Loss) Gain	(7)	(86)
Market Value	9,850	15,782
Commercial Paper and Corporate Debt Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	33,328	50,747
Unrealized (Loss) Gain	(53)	(71)
Market Value	33,275	50,676
Asset Backed Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	2,937	5,427
Unrealized (Loss) Gain	(12)	(35)
Market Value	2,925	5,392
Agency Debt Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	7,886	1,928
Unrealized (Loss) Gain	(12)	5
Market Value	$ 7,874	$ 1,933