Net Loss per Share - Summary of Basic and Diluted Loss Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net Loss	$ (13,075)	$ (10,932)
Deemed dividend from exchange of convertible preferred stock		(9,050)
Net loss attributable to common stockholders	$ (13,075)	$ (19,982)
Weighted average common shares outstanding, basic and diluted	44,649,572	1,952,667
Net loss per share, basic and diluted	$ (0.29)	$ (10.23)