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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Net revenue |  |  |  |
Licensing and other | $ 141 | $ 248 | $ 550 | $ 1,113
Royalty | 816 | 1,079 | 2,862 | 3,374
Total net revenue | 957 | 1,327 | 3,412 | 4,487
Cost of net revenue |  |  |  |
Licensing and other | 158 | 53 | 254 | 289
Total cost of net revenue | 158 | 53 | 254 | 289
Gross profit | 799 | 1,274 | 3,158 | 4,198
Operating expenses |  |  |  |
Research and development | 6,243 | 7,026 | 17,546 | 21,220
Selling, general and administrative | 1,595 | 1,738 | 4,678 | 6,092
Gain on sale of assets |  | (1,435) | (630) | (3,291)
Total operating expenses | 7,838 | 7,329 | 21,594 | 24,021
Loss from operations | (7,039) | (6,055) | (18,436) | (19,823)
Other income, net | 122 | 61 | 166 | 121
Loss before income taxes | (6,917) | (5,994) | (18,270) | (19,702)
Income tax provision | 28 | 79 | 68 | 139
Net loss | (6,945) | (6,073) | (18,338) | (19,841)
Other comprehensive loss, net of tax: |  |  |  |
Net unrealized gains (losses) on available-for-sale securities | 51 | 27 | (19) | 25
Comprehensive loss | $ (6,894) | $ (6,046) | $ (18,357) | $ (19,816)
Net loss per share |  |  |  |
Basic and diluted (in dollars per share) | $ (0.14) | $ (0.15) | $ (0.42) | $ (0.51)
Shares used in computing net loss per share |  |  |  |
Basic and diluted (in shares) | 48,164 | 39,299 | 44,173 | 38,919

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