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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Revenue:        
Collaboration revenue $ 954 $ 151 $ 1,275 $ 238
Total revenue 954 151 1,275 238
Operating expenses:        
Research and development 30,640 16,546 60,653 41,794
General and administrative 5,342 4,835 13,933 16,786
Total operating expenses 35,982 21,381 74,586 58,580
Loss from operations (35,028) (21,230) (73,311) (58,342)
Other income (expense):        
Interest income 4 344 246 1,145
Interest expense (607) (3) (1,196) (3)
Other income 338 226 553 878
Total other income (expense), net (265) 567 (397) 2,020
Net loss (35,293) (20,663) (73,708) (56,322)
Cumulative dividends on redeemable convertible preferred stock (3,457) (3,454) (10,296) (10,247)
Net loss attributable to common stockholders $ (38,750) $ (24,117) $ (84,004) $ (66,569)
Net loss per share attributable to common stockholders, basic and diluted $ (12.83) $ (8.05) $ (27.92) $ (22.29)
Weighted average common shares outstanding, basic and diluted 3,020,055 2,995,917 3,008,576 2,986,889
Comprehensive income (loss):        
Net loss $ (35,293) $ (20,663) $ (73,708) $ (56,322)
Other comprehensive income (loss):        
Unrealized gain (loss) on investments, net of tax of $0   (8) (43) 72
Total other comprehensive income (loss)   (8) (43) 72
Comprehensive loss $ (35,293) $ (20,671) $ (73,751) $ (56,250)