Selected Quarterly Information (Unaudited)

12 Months Ended

Dec. 31, 2013

Selected Quarterly Information (Unaudited)

14. Selected Quarterly Information (Unaudited)

        (in thousands, except per share amount)

Year Ended December 31, 2013	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Revenue	$	200		$	200		$	200		$	200
Total operating expenses		23,783			18,496			9,315			6,919
Loss from operations		(23,583	)		(18,296	)		(9,115	)		(6,719	)
Change in fair value of warrants		10,788			(403	)		(7,407	)		(1,793	)
Net (loss)		(12,799	)		(18,692	)		(16,713	)		(8,903	)
Loss per share, basic and diluted	$	(0.15	)	$	(0.22	)	$	(0.20	)	$	(0.09	)

Year Ended December 31, 2012	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Revenue	$	200		$	200		$	200		$	200
Total operating expenses		18,833			23,166			21,927			39,043
Loss from operations		(18,633	)		(22,966	)		(21,727	)		(38,843	)
Change in fair value of warrants		(5,811	)		(650	)		3,945			8,566
Net (loss)		(24,470	)		(23,613	)		(17,824	)		(30,225	)
Loss per share, basic and diluted	$	(0.32	)	$	(0.30	)	$	(0.23	)	$	(0.37	)