Net Loss per Share - Summary of Reconciliation of Denominator Used in Calculation 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 Basic And Diluted [Abstract]
Net loss	$ (23,159)	$ (17,716)
Weighted-average common shares outstanding — basic	46,428	43,275
Weighted-average common shares, outstanding — diluted	46,428	43,275
Net loss per share, basic and diluted	$ (0.50)	$ (0.41)