Net Loss Per Share - Computation of Basic and Diluted Net Loss per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Loss Per Share
Net loss - basic and diluted	$ (4,206)	$ (27,749)	$ (30,745)	$ (23,301)	$ (31,955)	$ (54,046)
Weighted-average common shares outstanding:
Basic	53,614,668		50,059,984		53,561,161	49,989,379
Diluted	53,614,668		50,059,984		53,561,161	49,989,379
Net loss per share:
Basic	$ (0.08)		$ (0.61)		$ (0.60)	$ (1.08)
Diluted	$ (0.08)		$ (0.61)		$ (0.60)	$ (1.08)