Nature of the Business and Basis of Presentation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Nature Of Business And Basis Of Presentation [Abstract]
Net loss	$ 3,200	$ 11,700	$ 28,400	$ 73,200
Accumulated deficit	$ 442,263		$ 442,263		$ 413,878