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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Revenues: |  |
Net product sales | $ 58,000 | $ 47,713
Total revenues | 58,000 | 47,713
Operating expenses: |  |
Cost of goods sold excluding amortization | 5,207 | 5,113
Research and development | 15,527 | 13,278
Selling, general and administrative | 37,021 | 31,029
Intangible asset amortization | 370 | 380
Total operating expenses | 58,125 | 49,800
Loss from operations | (125) | (2,087)
Other income | 1,366 | 1,485
Income (loss) before income taxes | 1,241 | (602)
Provision for income taxes | 755 | 10
Net income (loss) | $ 486 | $ (612)
Net income (loss) per share: |  |
Basic (in dollars per share) | $ 0.01 | $ (0.01)
Diluted (in dollars per share) | $ 0.01 | $ (0.01)
Weighted average shares outstanding: |  |
Basic (in shares) | 53,806,317 | 52,752,774
Diluted (in shares) | 54,870,146 | 52,752,774

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