Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Common Share (Details)

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Net Loss Per Common Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended 75 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Numerator:          
Net loss $ (5,935) $ (3,365) $ (18,945) $ (29,641) $ (75,520)
Common Stock dividend to Series A Convertible Preferred Stockholders       (5,861) (5,861)
Net loss attributed to Common Stock $ (5,935) $ (3,365) $ (18,945) $ (35,502) $ (81,381)
Denominator:          
Weighted average common shares outstanding-basic and diluted 24,375,749 7,028,059 20,738,007 5,897,462  
Basic and diluted net loss per common share $ (0.24) $ (0.48) $ (0.91) $ (6.02)