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Consolidated Statements of Operations - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
License and collaboration revenue $ 20,948  
Operating expenses:    
Research and development 52,975 $ 43,859
General and administrative 16,180 13,418
Total operating expenses 78,318 57,277
Loss from operations (57,370) (57,277)
Interest and other income, net 1,129 2,099
Net loss $ (56,241) $ (55,178)
Net loss per share attributable to common stockholders, basic and diluted $ (2.93) $ (4.60)
Shares used to compute net loss per share attributable to common stockholders, basic and diluted 19,179,299 12,004,489
License    
License and collaboration revenue $ 15,100  
Collaboration    
License and collaboration revenue 5,848  
Cost of license    
Operating expenses:    
Cost of license and collaboration 3,102  
Cost of collaboration    
Operating expenses:    
Cost of license and collaboration $ 6,061