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 6 Months Ended 72 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Numerator:          
Net loss $ (6,455) $ (3,733) $ (13,011) $ (26,276) $ (69,585)
Common Stock dividend to Series A Convertible Preferred Stockholders   (5,861)   (5,861) (5,861)
Net loss attributed to Common Stock $ (6,455) $ (9,594) $ (13,011) $ (32,137) $ (75,446)
Denominator:          
Weighted average common shares outstanding-basic and diluted 19,194,053 5,848,642 18,899,149 5,322,793  
Basic and diluted net loss per common share $ (0.34) $ (1.64) $ (0.69) $ (6.04)