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Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Revenues: |  |  |
Collaboration revenue | $ 4,929 | $ 4,610 | $ 17,190
Grant revenue | 5,138 | 3,939 | 3,110
Service and license revenue | 1,184 | 1,165 | 1,314
Total revenues | 11,251 | 9,714 | 21,614
Operating expenses: |  |  |
Research and development | 50,870 | 49,146 | 51,322
General and administrative | 25,943 | 28,164 | 17,570
Unoccupied facility expense | 926 |  |
Amortization of intangible assets | 0 | 0 | 299
Total operating expenses | 77,739 | 77,310 | 69,191
Loss from operations | (66,488) | (67,596) | (47,577)
Other income (expense): |  |  |
Interest income | 116 | 291 | 103
Interest expense |  | (2,351) | (1,957)
Other income (expense) | (348) | (293) | 834
Net loss | (66,720) | (69,949) | (48,597)
Preferred stock deemed dividend | (8,469) |  |
Net loss allocable to common stockholders | $ (75,189) | $ (69,949) | $ (48,597)
Net loss per share allocable to common stockholders - basic and diluted | $ (0.38) | $ (0.41) | $ (0.39)
Weighted average shares outstanding used to compute basic and diluted net loss per share allocable to common stockholders | 196,275 | 170,469 | 125,101

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