Loss per Share (Tables)

12 Months Ended

Dec. 31, 2013

Loss per Share

Schedule of common stock equivalents excluded in the calculation of diluted loss per share

	Year Ended December 31,
	2013		2012		2011
Shares Underlying Convertible Senior Secured Notes		6,219,782		—		—
Series A Preferred Stock		—		4,049,863		12,249,998
Warrants to purchase Series A Preferred Stock/Common Stock		13,388		21,090		143,749
Stock Options, Stock Appreciation Rights, and Non-vested Stock Options		151,737		256,939		598,109