Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($) Segment	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Accumulated deficit	$ (377,270)		$ (338,671)
Cash in operating activities	(35,458)	$ (25,903)
Cash and cash equivalents	27,690		52,100
Short-term investments	$ 140,561		$ 73,776
Number of operating segments | Segment	1