Net Loss Per Share - Computation of Basic and Diluted Net Loss per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Net Loss Per Share
Net loss - basic and diluted	$ (23,180)	$ (4,206)	$ (27,749)	$ (1,013)	$ (30,745)	$ (23,301)	$ (55,135)	$ (55,059)
Weighted-average common shares outstanding:
Basic	53,726,123			50,114,710			53,616,753	50,031,615
Diluted	53,726,123			50,114,710			53,616,753	50,031,615
Net loss per share:
Basic	$ (0.43)			$ (0.02)			$ (1.03)	$ (1.10)
Diluted	$ (0.43)			$ (0.02)			$ (1.03)	$ (1.10)