CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating expenses:
Research and development	$ 12,970	$ 5,975	$ 21,911	$ 12,146
General and administrative	5,410	2,065	10,199	3,772
Total operating expenses	18,380	8,040	32,110	15,918
Loss from operations	(18,380)	(8,040)	(32,110)	(15,918)
Other income:
Interest income	10		17	29
Total other income	10		17	29
Net loss and comprehensive loss	(18,370)	(8,040)	(32,093)	(15,889)
Cumulative dividends on redeemable convertible preferred stock		(855)	(1,228)	(1,570)
Net loss attributable to common stockholders	$ (18,370)	$ (8,895)	$ (33,321)	$ (17,459)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.50)	$ (56.85)	$ (1.13)	$ (115.83)
Weighted-average common shares outstanding, basic and diluted	36,843,087	156,454	29,593,814	150,735