Quarterly report pursuant to Section 13 or 15(d)

CONDENSED STATEMENTS OF OPERATIONS

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CONDENSED STATEMENTS OF OPERATIONS (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
CONDENSED STATEMENTS OF OPERATIONS        
Contract revenues from collaborations $ 1,400 $ 1,500 $ 1,400 $ 2,250
Costs and expenses:        
Research and development 19,393 20,924 39,708 38,828
General and administrative 4,892 5,458 10,287 11,614
Total costs and expenses 24,285 26,382 49,995 50,442
Loss from operations (22,885) (24,882) (48,595) (48,192)
Interest income 117 144 253 280
Net loss $ (22,768) $ (24,738) $ (48,342) $ (47,912)
Net loss per share, basic and diluted (in dollars per share) $ (0.26) $ (0.35) $ (0.55) $ (0.67)
Weighted average shares used in computing net loss per share, basic and diluted (in shares) 87,147 71,458 87,144 71,440