Loss Per Share - Schedule 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	$ (46,205)	$ (31,806)
Weighted average shares outstanding, basic and diluted	67,183	50,491
Net loss per share, basic and diluted	$ (0.69)	$ (0.63)