Summarized Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2012

Summarized Quarterly Financial Data [Abstract]

Summarized Quarterly Financial Data (Unaudited)

17.    Summarized Quarterly Financial Data (Unaudited)

Following are summarized quarterly financial data (unaudited) for the years ended December 31, 2012 and 2011:

	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

	2011
	March 31			June 30			September 30			December 31
	(In thousands)
Total revenue	$	—		$	—		$	—		$	—
Operating loss		(2,050	)		(2,226	)		(1,531	)		(2,330	)
Net income (loss)		10,999			1,842			(17,606	)		19,816
Net income (loss) per share, basic	$	0.21		$	0.04		$	(0.29	)	$	0.33
Net income (loss) per share, diluted	$	0.19		$	0.03		$	(0.29	)	$	0.30