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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (unaudited) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Revenues: |  |  |  |
License and collaborative fees | $ 645 | $ 2,450 | $ 1,852 | $ 4,615
Contract and other | 1,429 | 2,686 | 5,412 | 9,903
Total revenues | 2,074 | 5,136 | 7,264 | 14,518
Operating expenses: |  |  |  |
Research and development | 17,559 | 20,235 | 57,255 | 61,371
Selling, general and administrative | 5,632 | 5,354 | 15,913 | 15,768
Restructuring | 2,561 |  | 2,561 | 84
Total operating expenses | 25,752 | 25,589 | 75,729 | 77,223
Loss from operations | (23,678) | (20,453) | (68,465) | (62,705)
Other income (expense): |  |  |  |
Interest expense | (1,030) | (1,060) | (3,152) | (3,295)
Other income (expense), net | (194) | 1,393 | 1,453 | 1,332
Revaluation of contingent warrant liabilities | 24,422 | 5,721 | 24,206 | 33,685
Net loss | $ (480) | $ (14,399) | $ (45,958) | $ (30,983)
Basic net loss per share of common stock (in dollars per share) | $ 0.00 | $ (0.13) | $ (0.39) | $ (0.29)
Diluted net loss per share of common stock (in dollars per share) | $ 0.00 | $ (0.17) | $ (0.39) | $ (0.55)
Shares used in computing basic net loss per share of common stock (in shares) | 118,552 | 107,208 | 117,437 | 106,768
Shares used in computing diluted net loss per share of common stock (in shares) | 118,552 | 114,323 | 117,437 | 114,876
Other comprehensive loss: |  |  |  |
Net loss | $ (480) | $ (14,399) | $ (45,958) | $ (30,983)
Net unrealized (loss) gain on available-for-sale securities |  | (2) |  | 5
Comprehensive loss | $ (480) | $ (14,401) | $ (45,958) | $ (30,978)

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