11. Loss Per Share

Basic loss per common share is determined by dividing loss attributable to common stockholders by the weighted-average number of common shares outstanding during the period, without consideration of common stock equivalents. Diluted loss per share is computed by dividing the loss attributable to common stockholders by the weighted-average number of common share equivalents outstanding for the period. The treasury stock method is used to determine the dilutive effect of the Company’s stock option grants, SARS, potential Employee Stock Purchase Plan (ESPP) awards and warrants, and the if-converted method is used to determine the dilutive effect of the Company’s Notes and Series A Preferred Stock. The following common stock equivalents were excluded in the calculation of diluted loss per share because their effect would be anti-dilutive as applied to the net loss applicable to common stockholders for the periods ending September 30, 2013 and 2012:



	Three Months ended		Nine Months ended
	September 30,		September 30,
	2013	2012	2013	2012
Convertible Senior Secured Notes	16,983,531	—	9,393,821	—
Series A Preferred Stock	—	—	—	5,409,671
Warrants to purchase Series A
Preferred Stock/Common Stock	13,561	91,184	12,924	71,662
Stock Options, Stock Appreciation Rights,
Non-vested Stock Options, and ESPP Awards	166,531	346,783	159,808	290,029