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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Operating expenses    
Research and development $ 3,600 $ 22,004
General and administrative 4,917 7,656
Total operating expenses 8,517 29,660
Loss from operations (8,517) (29,660)
Interest income 193 199
Other income (expense), net (657) (261)
Net loss $ (8,981) $ (29,722)
Net loss per share - basic and diluted $ (0.25) $ (0.85)
Weighted-average common shares used to compute basic and diluted net loss per share 36,019 35,004