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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Revenue: |  |  |  |  |
Royalties |  | $ 69,990 | $ 62,835 | $ 138,946 | $ 125,712
Product revenue |  | 8,401 | 3,902 | 19,305 | 7,214
Contract and other revenue |  | 16,329 | 9,764 | 33,820 | 16,257
Total revenue |  | 94,720 | 76,501 | 192,071 | 149,183
Operating costs and expenses: |  |  |  |  |
Cost of product revenue | [1] | 7,480 | 3,016 | 12,730 | 5,550
Cost of contract and other revenue |  | 14,337 | 11,073 | 28,818 | 20,746
Research and development | [1] | 37,522 | 28,753 | 73,522 | 57,280
Sales, general and administrative | [1] | 27,137 | 21,789 | 55,323 | 44,884
Gain from settlement |  | 0 | (138) | 0 | (579)
Total operating costs and expenses |  | 86,476 | 64,493 | 170,393 | 127,881
Operating income (loss) |  | 8,244 | 12,008 | 21,678 | 21,302
Interest income and other income (expense), net |  | 129 | 1,138 | 283 | 1,380
Interest expense |  | (3,261) | (3,163) | (6,467) | (6,304)
Interest and other income (expense), net |  | (3,132) | (2,025) | (6,184) | (4,924)
Income before income taxes |  | 5,112 | 9,983 | 15,494 | 16,378
Provision for (benefit from) income taxes |  | 2,507 | 6,107 | 9,883 | 10,624
Net Income (Loss) |  | $ 2,605 | $ 3,876 | $ 5,611 | $ 5,754
Net income per share: |  |  |  |  |
Earnings Per Share, Basic |  | $ 0.02 | $ 0.04 | $ 0.05 | $ 0.05
Earnings Per Share, Diluted |  | $ 0.02 | $ 0.03 | $ 0.05 | $ 0.05
Weighted average shares used in per share calculation: |  |  |  |  |
Basic (in shares) |  | 110,060 | 109,904 | 110,758 | 109,818
Diluted (in shares) |  | 112,565 | 112,061 | 114,091 | 112,202
[1] | Includes stock-based compensation

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