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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
License and collaboration revenue $ 1,467 $ 16,366
Operating expenses:    
Research and development 17,013 13,264
General and administrative 5,412 3,691
Total operating expenses 23,905 21,434
Loss from operations (22,438) (5,068)
Interest and other income (expense), net   1,015
Net loss $ (22,438) $ (4,053)
Net loss per share attributable to common stockholders, basic and diluted $ (0.79) $ (0.28)
Shares used to compute net loss per share attributable to common stockholders, basic and diluted 28,385,432 14,592,451
License    
License and collaboration revenue $ 0 $ 15,045
Collaboration    
License and collaboration revenue 1,467 1,321
Cost of license    
Operating expenses:    
Cost of license and collaboration   3,047
Cost of collaboration    
Operating expenses:    
Cost of license and collaboration $ 1,480 $ 1,432