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Consolidated Statements of Operations and Comprehensive Loss - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Operating expenses:    
Research and development $ 36,199 $ 21,346
General and administrative 13,156 5,294
Total operating expenses 49,355 26,640
Loss from operations (49,355) (26,640)
Other expenses, net (203) (30,562)
Net loss before income tax (49,558) (57,202)
Income tax benefit (expense) 59 (218)
Net loss (49,499) (57,420)
Other comprehensive income (loss):    
Unrealized gain on available-for-sale securities 8  
Foreign currency translation adjustments (18)  
Total other comprehensive loss (10)  
Comprehensive loss $ (49,509) $ (57,420)
Net loss per share, basic and diluted $ (3.08) $ (24.49)
Weighted-average shares used to compute net loss per share, basic and diluted 16,087,785 2,344,191