Description of Business and Basis of Presentation (Tables)

6 Months Ended

Jun. 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 income (loss) per share (in thousands, except per share data):

	Three Months Ended June 30,					Six Months Ended June 30,
	2016		2015			2016			2015
Numerator
Net income (loss)	$	2,167	$	(9,376	)	$	(4,681	)	$	(18,717	)
Denominator
Weighted-average common shares outstanding	31,842		30,323			31,746			29,886
Effect of potentially dilutive securities:
Options to purchase common stock	—		—			—			—
Restricted stock awards	9		—			—			—
Restricted stock unit awards	168		—			—			—
Employee stock purchase plan	8		—			—			—
Weighted-average common shares outstanding, assuming dilution	32,027		30,323			31,746			29,886
Net income (loss) per share
Basic	$	0.07	$	(0.31	)	$	(0.15	)	$	(0.63	)
Diluted	$	0.07	$	(0.31	)	$	(0.15	)	$	(0.63	)

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 income (loss) per share calculation because to do so would be anti-dilutive (in thousands):

	Three Months Ended June 30,		Six Months Ended June 30,
	2016	2015	2016	2015
Outstanding options to purchase common stock	661	918	636	918
Unvested restricted stock awards	99	286	158	286
Unvested restricted stock unit awards	471	862	1,742	862
Employee stock purchase plan awards	—	24	—	24