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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Operating expenses:    
Research and development $ 51,269 $ 40,415
General and administrative 18,685 13,207
Total operating expenses 69,954 53,622
Loss from operations (69,954) (53,622)
Other income (expense), net:    
Interest income 1,082 984
Other income (expense), net 582 (119)
Total other income (expense), net 1,664 865
Net loss $ (68,290) $ (52,757)
Net loss per share, basic and diluted $ (1.63) $ (1.35)
Shares used in computing net loss per share, basic and diluted 41,841,612 38,970,151