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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Revenues        
Type of Revenue [Extensible List] us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember
Total revenues $ 83,205 $ 57,063 $ 146,164 $ 105,931
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 $ 2,958 $ 3,562 $ 5,908 $ 5,715
License fees and royalties 2,037 1,516 3,667 2,848
Research and development 67,320 46,592 120,243 85,868
Selling, general and administrative 67,981 69,472 161,071 130,398
Total operating expenses 140,296 121,142 290,889 224,829
Loss from operations (57,091) (64,079) (144,725) (118,898)
Interest income, net 2,527 1,279 5,461 2,449
Other expense (12) (247) (241) (247)
Loss before income taxes (54,576) (63,047) (139,505) (116,696)
Income tax expense 365 219 740 866
Net loss $ (54,941) $ (63,266) $ (140,245) $ (117,562)
Net loss per common share, basic and diluted $ (0.38) $ (0.51) $ (0.97) $ (0.94)
Weighted average common shares outstanding, basic and diluted 144,314 124,910 144,148 124,819