Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements Of Operations

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Condensed Consolidated Statements Of Operations (USD $)
In Thousands, except Per Share data
3 Months Ended 9 Months Ended 121 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Condensed Consolidated Statements Of Operations [Abstract]          
Revenue         $ 5,027
Operating expenses:          
Research and development 6,481 4,773 17,646 14,194 196,293
General and administrative 1,308 1,297 4,290 3,591 67,787
Total operating expenses 7,789 6,070 21,936 17,785 264,080
Loss from operations (7,789) (6,070) (21,936) (17,785) (259,053)
Interest income (expense), net 5 14 20 53 8,339
Other income (expense) 3,659 148 1,538 5,604 4,393
Net loss (4,125) (5,908) (20,378) (12,128) (246,321)
Dividend related to beneficial conversion feature of redeemable convertible preferred stock         (40,862)
Net loss attributable to common stockholders $ (4,125) $ (5,908) $ (20,378) $ (12,128) $ (287,183)
Net loss per common share, basic and diluted $ (0.08) $ (0.18) $ (0.45) $ (0.36)  
Weighted average number of shares used in per common share calculations: basic and diluted 49,052 33,672 44,812 33,638