Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Loss Per Share

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

	Three months ended March 31,
	2013	2012
Series A Preferred Stock	—	12,249,998
Warrants to purchase Series A Preferred Stock/Common Stock	15,276	143,749
Stock Options, Stock Appreciation Rights, Non-vested Stock Options, and ESPP Awards	190,418	528,163