Statements of Operations (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended 90 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Grant Revenue         $ 650
Operating expenses:          
Research and development 3,359 3,703 6,813 5,277 68,071
Acquired in-process research and development         5,500
Selling, general and administrative 2,420 2,530 4,807 4,500 28,822
Total operating expenses 5,779 6,233 11,620 9,777 102,393
Loss from operations (5,779) (6,233) (11,620) (9,777) (101,743)
Interest income 6 17 16 42 662
Interest expense (395) (249) (848) (452) (8,671)
Loss before tax benefit (6,168) (6,465) (12,452) (10,187) (109,752)
Income tax benefit         698
Net loss $ (6,168) $ (6,465) $ (12,452) $ (10,187) $ (109,054)
Basic and diluted net loss per common share (in dollars per share) $ (0.42) $ (0.44) $ (0.85) $ (0.70)  
Weighted average basic and diluted common shares outstanding (in shares) 14,736,809 14,561,519 14,734,696 14,557,655