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Condensed Consolidated Statements of Income - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 29, 2019
Mar. 30, 2018
Total revenues $ 215,487 $ 213,719
Operating expenses:    
Cost of goods sold 7,501 5,639
Research and development 63,289 37,757
Selling, general and administrative 60,138 54,016
Total operating expenses 130,928 97,412
Income from operations 84,559 116,307
Other income (expense), net:    
Interest income 6,087 1,895
Other, net 25 169
Total other income (expense), net: 6,112 2,064
Income before income taxes 90,671 118,371
Provision for income taxes (14,896) (2,514)
Net income $ 75,775 $ 115,857
Net income per share, basic (in dollars per share) $ 0.25 $ 0.39
Net income per share, diluted (in dollars per share) $ 0.24 $ 0.37
Shares used in computing net income per share, basic (in shares) 300,542 296,421
Shares used in computing net income per share, diluted (in shares) 314,644 313,691
Net product revenues    
Total revenues $ 179,581 $ 134,272
Collaboration revenue    
Total revenues $ 35,906 $ 79,447