Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information (Unaudited) [Abstract]

Quarterly Information

The Company's unaudited quarterly information for the years ended December 31, 2013 and 2012 is as follows:

	Quarter Ended
	March 31			June 30			September 30			December 31
	(in thousands, except per share data)
2013:
Revenue	$	3,833		$	3,531		$	4,802		$	8,748
Net loss	$	(9,996	)	$	(12,633	)	$	(15,300	)	$	(14,054	)
Net loss per share	$	(0.07	)	$	(0.08	)	$	(0.09	)	$	(0.07	)

	Quarter Ended
	March 31			June 30			September 30			December 31
	(in thousands, except per share data)
2012:
Revenue	$	4,642		$	7,103		$	5,765		$	4,567
Net loss	$	(7,336	)	$	(5,920	)	$	(7,217	)	$	(8,035	)
Net loss per share	$	(0.06	)	$	(0.05	)	$	(0.05	)	$	(0.06	)