Net Loss Per Share

12 Months Ended

Dec. 31, 2013

Net Loss Per Share

14. Net Loss Per Share

Basic net loss per share amounts have been computed based on the weighted-average number of common shares outstanding. Diluted net loss per share amounts is computed based on the weighted-average number of common shares outstanding plus the dilutive effect, if any, of potential common shares. The computation of potential common shares has been performed using the treasury stock method.

The calculation of net loss and the number of shares used to compute basic and diluted earnings per share for the years ended December 31, 2013, 2012 and 2011 are as follows:

In thousands, except per share amounts	2013			2012			2011
Net loss	$	(274,158	)	$	(220,872	)	$	(123,603	)
Weighted average shares outstanding – basic and diluted		183,575			164,964			132,375
Net loss per share – basic and diluted	$	(1.49	)	$	(1.34	)	$	(0.93	)

For the years ended December 31, 2013, 2012 and 2011, the following potentially dilutive securities were not included in the computation of net loss per share because the effect would be anti-dilutive:

In thousands	2013		2012		2011
Stock options		10,380		8,228		7,381
Restricted stock and restricted stock units		2,048		1,903		2,785
Warrants		—		—		5,806
		12,428		10,131		15,972