Net Loss per Share

3 Months Ended

Mar. 31, 2013

Net Loss per Share

4. Net Loss per Share

Basic net loss per share is calculated by dividing the net loss by the weighted-average number of common shares outstanding for the period without consideration for potential common shares. Diluted net loss per share is computed by dividing the net loss by the weighted-average number of common shares outstanding for the period plus any dilutive potential common shares for the period determined using the treasury-stock method. For purposes of this calculation, restricted stock units, options to purchase stock and warrants are considered to be potential common shares and are only included in the calculation of diluted net loss per share when their effect is dilutive.

	Three Months Ended March 31,
	2013			2012
	(In thousands, except per share amounts)
Numerator:
Net loss	$	(23,548	)	$	(9,144	)
Denominator:
Weighted-average common shares outstanding		47,249			35,629
Basic and diluted net loss per share	$	(0.50	)	$	(0.26	)
Outstanding securities at period end not included in the computation of diluted net loss per share as they had an anti-dilutive effect:
Restricted stock units and options to purchase common stock		7,151			6,568
Warrants outstanding		283			305
		7,434			6,873