Description of Business and Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of computation of basic and diluted net income (loss) per share

The following table sets forth the computation of basic and diluted net loss per share (in thousands, except per share data):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2016			2015			2016			2015
Numerator
Net loss	$	(6,855	)	$	(1,449	)	$	(11,536	)	$	(20,166	)
Denominator
Weighted-average common shares outstanding	31,989			31,529			31,828			30,440
Net loss per share
Basic and diluted	$	(0.21	)	$	(0.05	)	$	(0.36	)	$	(0.66	)

Schedule of anti-dilutive shares excluded from computation of net income (loss) per share

The following table summarizes instruments that may be convertible into common shares that are not included in the denominator used in the diluted net loss per share calculation because to do so would be anti-dilutive (in thousands):

	Three and Nine Months Ended September 30,
	2016	2015
Outstanding options to purchase common stock	465	956
Unvested restricted stock awards	96	263
Unvested restricted stock unit awards	1,686	870
Employee stock purchase plan awards	61	—