10. Net Loss per Share

Basic net loss per common share is calculated by dividing net loss by the weighted average number of common shares outstanding during the reporting period. Diluted net loss per common share is calculated by giving effect to all potential dilutive common shares, including options, warrants, common stock subject to repurchase and convertible preferred stock. For the three months and nine months ended September 24, 2011, unvested restricted stock awards granted during the quarter are included in the calculation of basic weighted average shares because such shares are participating securities.

The following table sets forth the computation of basic and diluted net loss per share for the periods indicated (in thousands, except per share data):

 

		Three Months Ended								Nine Months Ended
		September 24, 2011				September 25, 2010				September 24, 2011				September 25, 2010
Numerator:
Net loss applicable to common stockholders		$	(6,934	)		$	(5,351	)		$	(47,336	)		$	(18,715	)
Denominator:
Weighted-average common shares outstanding			47,128				37,341				44,866				26,751
Basic and diluted net loss per share		$	(0.15	)		$	(0.14	)		$	(1.06	)		$	(0.70	)

 

As the Company incurred net losses in the periods presented, the following table displays the Company's other outstanding common stock equivalents that were excluded from the computation of diluted net loss per share, as the effect of including them would have been anti-dilutive (in thousands):

 

		Nine Months Ended
		September 24, 2011				September 25, 2010
Stock options			1,647				775
Restricted stock units			2,074				5,395
Common stock warrants			24				65