Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Data (Unaudited) [Abstract]

Quarterly financial data (Unaudited)

The following table summarizes unaudited quarterly financial data for the years ended December 31,2012 and 2011 (in thousands, except per share data).

	2012
	First	Second	Third	Fourth
	Quarter	Quarter	Quarter	Quarter	Total
Revenues	$-	$-	$-	$-	$-
Operating loss	(7,264)	(9,983)	(9,353)	(15,838)	(42,438)
Net loss after income taxes	(6,845)	(9,696)	(9,382)	(15,451)	(41,374)
Basic and diluted net loss attributable to common
stockholders per common share	($0.28)	($0.39)	($0.38)	$(0.49)	$(1.56)
	2011
	First	Second	Third	Fourth
	Quarter	Quarter	Quarter	Quarter	Total
Revenues	$1,601	$978	$435	$1,403	$4,417
Operating loss	(7,415)	(10,473)	(34,960)	(8,871)	(61,719)
Net loss after income taxes	(6,894)	(10,017)	(34,591)	(8,162)	(59,664)
Basic and diluted net income (loss) attributable to
common stockholders per common share	($0.85)	($0.40)	($1.39)	($0.33)	($2.95)