Net Income (Loss) Per Share

3 Months Ended

Mar. 31, 2013

Net Income (Loss) Per Share [Abstract]

Net Income (Loss) Per Share

4. 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 March  31,
	2013		2012
Net income (loss)	$	2,024	$	(8,207	)
Weighted average common basic shares		40,910		40,843
Effect of dilutive securities		29		—
Weighted average common dilutive shares		40,939		40,843
Basic and diluted net income (loss) per share	$	0.05	$	(0.20	)

For the three months ended March 31, 2013, 29 thousand shares of unvested restricted common stock were included in the computation of diluted income per share. For the three months ended March 31, 2012, the computation of diluted net loss per share did not include 0.1 million shares of unvested restricted common stock as their inclusion would have been anti-dilutive. Options to purchase approximately 1.6 million and 5.3 million shares for the three months ended March 31, 2013 and 2012, respectively, were also not included in the computation of diluted net loss per share as their exercise prices were in excess of the average stock prices for the periods presented.