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Unaudited Consolidated Statements of Operations and Comprehensive Loss - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Unaudited Consolidated Statements of Operations and Comprehensive Loss    
Collaboration revenues $ 3,243 $ 822
Operating expenses:    
Research and development 16,641 8,767
General and administrative 9,574 2,211
Total operating expenses 26,215 10,978
Operating loss (22,972) (10,156)
Change in fair value of derivative liability (84) (557)
Interest (expense) income, net (1,477) (599)
Pre-tax loss (24,533) (11,312)
Income tax expense (109) 0
Net loss $ (24,642) $ (11,312)
Share information:    
Net loss per share of common stock, basic $ (1.93) $ (5.49)
Net loss per share of common stock, diluted $ (1.93) $ (5.49)
Weighted-average shares of common stock outstanding, basic 12,783,523 2,059,986
Weighted-average shares of common stock outstanding, diluted 12,783,523 2,059,986
Comprehensive loss    
Net loss $ (24,642) $ (11,312)
Unrealized gain (loss) on marketable securities 177 (158)
Comprehensive loss $ (24,465) $ (11,470)