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	$ 12,024	$ 1,677	$ 19,469	$ 2,269
General and administrative	4,613	575	7,949	1,250
Total operating expenses	16,637	2,252	27,418	3,519
Loss from operations	(16,637)	(2,252)	(27,418)	(3,519)
Grant income	2,589		4,420	22
Other income (expense), net	74	260	158	(300)
Net loss	(13,974)	(1,992)	(22,840)	(3,797)
Unrealized gain on available-for-sale securities	9		4
Comprehensive loss attributable to common stockholders	$ (13,965)	$ (1,992)	$ (22,836)	$ (3,797)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.38)	$ (0.48)	$ (0.68)	$ (0.96)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted	37,214,602	4,127,645	33,813,104	3,937,501