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CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS    
Revenue $ 15,403 $ 20,492
Operating expenses:    
Research and development 74,062 54,217
General and administrative 28,219 20,817
Total operating expenses 102,281 75,034
Loss from operations (86,878) (54,542)
Other income (expense), net 395 3,542
Net loss $ (86,483) $ (51,000)
Net loss per share, basic and diluted $ (2.81) $ (1.85)
Weighted average common shares outstanding, basic and diluted 30,734,109 27,537,939
Comprehensive loss:    
Net loss $ (86,483) $ (51,000)
Other comprehensive income (loss):    
Unrealized gain (loss) on marketable securities (39) 45
Total other comprehensive income (loss) (39) 45
Comprehensive loss $ (86,522) $ (50,955)