Description of Business and Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2015

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 per share (in thousands, except per share data):

	Three Months Ended
	March 31,
	2015			2014
Numerator
Net income (loss)	$	(9,341	)	$	319
Denominator
Weighted-average common shares outstanding	29,445			29,047
Effect of potentially dilutive securities:
Options to purchase common stock	—			76
Restricted stock awards	—			53
Restricted stock unit awards	—			38
Employee stock purchase plan	—			2
Weighted-average common shares outstanding, assuming dilution	29,445			29,216
Net income (loss) per share
Basic	$	(0.32	)	$	0.01
Diluted	$	(0.32	)	$	0.01

Schedule of instruments 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

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
	March 31,
	2015	2014
Outstanding options to purchase common stock	897	413
Unvested restricted stock awards	361	323
Unvested restricted stock unit awards	825	—
Employee stock purchase plan awards	7	—