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Condensed Consolidated Statements of Operations and Comprehensive Loss (unaudited) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Operating expenses    
Research and development $ 5,586,251 $ 4,028,812
General and administrative 3,255,042 3,447,836
Total operating expenses 8,841,293 7,476,648
Loss from operations (8,841,293) (7,476,648)
Grant income 15,348  
Interest income 333,120 51,116
Total other income 348,468 51,116
Net and comprehensive loss $ (8,492,825) $ (7,425,532)
Net and comprehensive loss per share    
Basic and diluted $ (0.21) $ (0.27)
Weighted average number of common shares used in computing net and comprehensive loss per share, basic and diluted 40,588,004 27,045,509