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, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Net loss	$ (12,631)	$ (6,689)
Weighted average shares outstanding, basic and diluted	34,723	676
Net loss per share attributable to common stockholders, basic and diluted	$ (0.36)	$ (9.89)