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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Revenue: |  |  |  |  |
Royalties |  | $ 30,049 | $ 69,990 | $ 51,423 | $ 138,946
Product revenue |  | 8,087 | 8,401 | 15,400 | 19,305
Contract and other revenue |  | 18,322 | 16,329 | 36,061 | 33,820
Total revenue |  | 56,458 | 94,720 | 102,884 | 192,071
Operating costs and expenses: |  |  |  |  |
Cost of product revenue | [1] | 4,199 | 7,480 | 8,556 | 12,730
Cost of contract and other revenue |  | 11,089 | 14,337 | 23,211 | 28,818
Research and development | [1] | 37,696 | 37,522 | 77,813 | 73,522
Sales, general and administrative | [1] | 24,483 | 27,137 | 54,681 | 55,323
Restructuring charges (recoveries) |  | (1,022) | 0 | 2,223 | 0
Total operating costs and expenses |  | 76,445 | 86,476 | 166,484 | 170,393
Operating income (loss) |  | (19,987) | 8,244 | (63,600) | 21,678
Interest income and other income (expense), net |  | 8,249 | 129 | 17,365 | 283
Interest expense |  | (4,634) | (3,261) | (9,055) | (6,467)
Interest and other income (expense), net |  | 3,615 | (3,132) | 8,310 | (6,184)
Income (loss) before income taxes |  | (16,372) | 5,112 | (55,290) | 15,494
Provision for (benefit from) income taxes |  | (1,015) | 2,507 | (4,244) | 9,883
Net Income (Loss) |  | $ (15,357) | $ 2,605 | $ (51,046) | $ 5,611
Net income (loss) per share: |  |  |  |  |
Earnings Per Share, Basic |  | $ (0.14) | $ 0.02 | $ (0.47) | $ 0.05
Earnings Per Share, Diluted |  | $ (0.14) | $ 0.02 | $ (0.47) | $ 0.05
Weighted average shares used in per share calculation: |  |  |  |  |
Basic (in shares) |  | 107,737 | 110,060 | 108,542 | 110,758
Diluted (in shares) |  | 107,737 | 112,565 | 108,542 | 114,091
[1] | Includes stock-based compensation

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