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Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
REVENUE |  |  |
Contract revenue |  | $ 646 | $ 1,301
OPERATING EXPENSES |  |  |
Research and development | 15,045 | 8,207 | 7,264
General and administrative | 8,786 | 3,501 | 3,971
Total operating expenses | 23,831 | 11,708 | 11,235
Operating loss | (23,831) | (11,062) | (9,934)
OTHER INCOME (EXPENSES) |  |  |
Gain on sale of royalty interest |  |  | 2,500
Other income, net |  |  | 240
Interest expense, net | (599) | (373) | (2)
Total other income (expenses) | (599) | (373) | 2,738
Loss from continuing operations | (24,430) | (11,435) | (7,196)
Gain (loss) from discontinued operations | 1,082 | (379) | (150)
Net loss | $ (23,348) | $ (11,814) | $ (7,346)
Basic and diluted net loss per share: |  |  |
Loss from continuing operations | $ (0.10) | $ (0.10) | $ (0.18)
Net loss | $ (0.10) | $ (0.10) | $ (0.19)
Weighted-average common shares used to compute basic and diluted net loss per share | 244,458 | 120,263 | 39,671

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