Net Loss per Share of Common Stock - Summary of Computation of Basic and Diluted Net Loss Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net loss	$ (8,004)	$ (10,796)
Basic and diluted net loss per share	$ (0.44)	$ (0.72)
Weighted-average common shares used to compute basic and diluted net loss per share	18,067	15,013