Earnings Per Share - Computation of Basic and Diluted Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net loss attributable to common stockholders	$ (27,959)	$ (13,862)
Denominator:
Weighted average shares used to compute net loss per share attributable to common stockholders, basic (in shares)	119,220	113,912
Weighted average effect of potentially dilutive shares to purchase common stock (in shares)	0	0
Weighted average shares used to compute net loss per share attributable to common stockholders, diluted (in shares)	119,220	113,912
Net loss per share attributable to common stockholders
Basic (in dollars per share)	$ (0.23)	$ (0.12)
Diluted (in dollars per share)	$ (0.23)	$ (0.12)