Net Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net loss	$ (12,661)	$ (17,100)
Denominator:
Weighted-average shares used to compute basic and diluted net loss per share	113,957	107,352
Basic and diluted net loss per share	$ (0.11)	$ (0.16)