Net Loss Per Share - Schedule of Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net loss	$ (4,218)	$ (10,363)	$ (40,076)	$ (27,497)
Weighted-average number of common shares used in computing net loss per share, basic and diluted (in shares)	90,585	88,789	90,113	91,850
Net loss per share, basic and diluted (in USD per share)	$ (0.05)	$ (0.12)	$ (0.44)	$ (0.30)