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 June 30, 2013 and 2012:



	Three Months ended June 30,		Six Months ended June 30,
	2013	2012	2013	2012
Convertible Senior Secured Notes	11,011,300	—	5,536,068	—
Series A Preferred Stock	—	4,038,461	—	8,144,229
Warrants to purchase Series A Preferred Stock/Common Stock	9,543	143,749	12,592	143,749
Stock Options, Stock Appreciation Rights and Non-vested Stock Options	137,349	498,053	160,061	498,053