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Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Operating expenses:        
Research and development $ 6,112 $ 8,624 $ 21,135 $ 27,576
General and administrative 3,572 4,981 12,209 14,594
Restructuring 1,505 0 2,712 0
Total operating expenses 11,189 13,605 36,056 42,170
Loss from operations (11,189) (13,605) (36,056) (42,170)
Interest income 661 198 1,831 307
Other income (expense), net 83 50 96 6,634
Net loss (10,445) (13,357) (34,129) (35,229)
Unrealized gain (loss) on marketable securities, net of tax (4) 52 242 (305)
Comprehensive loss $ (10,449) $ (13,305) $ (33,887) $ (35,534)
Net loss per share attributable to common stockholders, basic $ (0.34) $ (0.38) $ (1.13) $ (1.01)
Net loss per share attributable to common stockholders, diluted $ (0.34) $ (0.38) $ 1.13 $ (1.01)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic 30,497 34,968 30,182 34,926
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted 30,497 34,968 30,182 34,926