Income per Share Applicable to Common Stockholders (Tables)

3 Months Ended

Mar. 31, 2013

Income per Share Applicable to Common Stockholders

Schedule of computations of income per share applicable to common stockholders

	Three Months Ended
	March 31,
(in thousands, except per share amounts)	2012		2013
Basic net income per common share
Net income	$	192	$	1,125
Basic income per common share	$	0.01	$	0.03
Weighted-average common shares outstanding	33,826		37,547
Diluted net income per common share
Net income	$	192	$	1,125
Diluted income per common share	$	0.00	$	0.03
Weighted-average common shares used to compute diluted net income per share	39,431		40,459

Schedule of potential common shares excluded from computation of diluted (loss) income per common share as the effect would be anti-dilutive

Outstanding stock options	2,110	2,689
Outstanding restricted stock units	66	717
Common stock warrants	—	11