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	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net loss attributable to common stockholders- basic and diluted	$ (30,543)	$ (18,218)
Net loss per share- basic and diluted	$ (1.93)	$ (1.57)
Weighted-average common shares used to compute net loss per share- basic and diluted	15,790	11,589