Summarized Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Summarized Quarterly Financial Data

Following are summarized quarterly financial data (unaudited) for the years ended December 31, 2013 and 2012:

	2013
	March 31			June 30			September 30			December 31
	(In thousands)
Total revenue	$	—		$	—		$	—		$	—
Operating loss		(1,712	)		(1,788	)		(1,761	)		(2,343	)
Net income (loss)		(2,424	)		(13,982	)		(1,720	)		(2,813	)
Net income (loss) per share, basic	$	(0.04	)	$	(0.23	)	$	(0.03	)	$	(0.05	)
Net income (loss) per share, diluted	$	(0.04	)	$	(0.23	)	$	(0.03	)	$	(0.05	)

	2012
	March 31			June 30			September 30			December 31
	(In thousands)
Total revenue	$	—		$	—		$	—		$	—
Operating loss		(1,765	)		(1,421	)		(1,474	)		(2,161	)
Net income (loss)		(736	)		2,768			(4,587	)		627
Net income (loss) per share, basic	$	(0.01	)	$	0.05		$	(0.08	)	$	0.01
Net income (loss) per share, diluted	$	(0.01	)	$	0.05		$	(0.08	)	$	0.01