CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue:
Collaboration revenue	$ 13,191	$ 134
Total revenue	13,191	134
Operating expenses:
Research and development	16,550	18,391
General and administrative	6,588	4,233
Total operating expenses	23,138	22,624
Loss from operations	(9,947)	(22,490)
Other income (expense):
Interest expense	(698)	(295)
Interest income	5	223
Other income	332	60
Total other expense, net	(361)	(12)
Net loss	(10,308)	(22,502)
Cumulative dividends on redeemable convertible preferred stock		(3,419)
Net loss attributable to common stockholders	$ (10,308)	$ (25,921)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.51)	$ (8.64)
Weighted average common shares outstanding, basic and diluted	20,333,398	3,001,660
Comprehensive loss:
Net loss	$ (10,308)	$ (22,502)
Other comprehensive loss:
Unrealized loss on investments, net of tax of $0		(41)
Total other comprehensive loss		(41)
Comprehensive loss	$ (10,308)	$ (22,543)