NET LOSS PER SHARE (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Summary of Basic and Diluted Net Loss Per Common Share

The following table sets forth the computation of the Company’s basic and diluted net loss per share attributable to common stockholders for the periods presented (in thousands, except share and per share data):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2016			2015			2016			2015
Net loss attributable to common stockholders	$	(5,895	)	$	(9,628	)	$	(19,039	)	$	(34,452	)
Net loss per share attributable to common stockholders, basic and diluted	$	(0.15	)	$	(0.25	)	$	(0.48	)	$	(1.57	)
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted	39,965,454			39,181,118			39,708,257			21,976,654

Summary of Anti Dilutive Loss Attributable to Common Stockholders

The following shares have been excluded from the calculation of diluted net loss per share attributable to common stockholders for each period presented because they are anti-dilutive:

	As of September 30,
	2016	2015
Shares subject to outstanding stock options and employee stock purchase plan	4,093,778	4,519,766
Shares subject to outstanding restricted stock units	718,153	—
Total	4,811,931	4,519,766