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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Revenues: |  |  |  |
License fees and royalties | $ 181 | $ 636 | $ 1,058 | $ 2,020
Operating expenses: |  |  |  |
Research and development | 5,338 | 11,684 | 18,066 | 39,568
Restructuring charges | 116 |  | 1,032 |
General and administrative | 3,460 | 4,829 | 11,643 | 15,726
Total operating expenses | 8,914 | 16,513 | 30,741 | 55,294
Loss from operations | (8,733) | (15,877) | (29,683) | (53,274)
Unrealized loss on derivatives | (208) | (44) | (207) | (10)
Interest and other income | 699 | 140 | 836 | 481
Interest and other expense | (12) | (172) | (44) | (215)
Net loss | $ (8,254) | $ (15,953) | $ (29,098) | $ (53,018)
Basic and diluted net loss per share (in dollars per share) | $ (0.06) | $ (0.13) | $ (0.23) | $ (0.42)
Shares used in computing basic and diluted net loss per share (in shares) | 128,293,074 | 127,236,993 | 128,146,333 | 126,833,916

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- Definition Revenue earned during the period relating to consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. Royalty revenue is derived from a percentage or stated amount of sales proceeds or revenue generated by the third party using the entity's property. Examples of property from which royalties may be derived include patents and oil and mineral rights. + References No definition available. + Details
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- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References No definition available. + Details
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