Condensed Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating expenses:
Research and development	$ 15,019	$ 8,303	$ 29,602	$ 14,215
General and administrative	4,388	2,228	8,378	3,673
Total operating expenses	19,407	10,531	37,980	17,888
Loss from operations	(19,407)	(10,531)	(37,980)	(17,888)
Other income (expense), net	568	(145)	1,517	(258)
Net loss	$ (18,839)	$ (10,676)	$ (36,463)	$ (18,146)
Net loss per share, basic and diluted	$ (0.62)	$ (19.08)	$ (1.19)	$ (36.17)
Weighted-average common shares outstanding, basic and diluted	30,551,736	559,671	30,521,600	501,716