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Condensed Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Revenues        
Type of Revenue [Extensible List] us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember
Total revenues $ 58,305 $ 35,578 $ 164,236 $ 81,339
Operating expenses        
Type of Cost, Good or Service [Extensible List] us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember
Cost of product sales $ 3,839 $ 2,135 $ 9,554 $ 6,622
License fees and royalties 1,536 1,078 4,384 2,735
Research and development 53,112 36,421 138,980 106,010
Selling, general and administrative 61,089 61,588 191,487 188,373
Total operating expenses 119,576 101,222 344,405 303,740
Loss from operations (61,271) (65,644) (180,169) (222,401)
Interest income, net 1,229 1,063 3,678 3,019
Other expense (1,720)   (1,967)  
Loss before income taxes (61,762) (64,581) (178,458) (219,382)
Income tax expense 376 667 1,242 1,150
Net loss $ (62,138) $ (65,248) $ (179,700) $ (220,532)
Net loss per common share, basic and diluted $ (0.50) $ (0.53) $ (1.44) $ (1.81)
Weighted average common shares outstanding, basic and diluted 125,009 122,484 124,883 122,089