Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating expenses:
Research and development	$ 11,040	$ 7,102	$ 27,461	$ 16,486
General and administrative	2,505	2,075	7,320	12,360
Total operating expenses	13,545	9,177	34,781	28,846
Loss from operations	(13,545)	(9,177)	(34,781)	(28,846)
Other income:
Interest income	20	58	48	92
Other income, net	612	904	1,875	1,512
Total other income	632	962	1,923	1,604
Net loss	$ (12,913)	$ (8,215)	$ (32,858)	$ (27,242)
Net loss per share, basic and diluted (in USD per share)	$ (0.70)	$ (0.82)	$ (2.35)	$ (3.96)
Weighted-average common shares outstanding, basic and diluted (in shares)	18,405,840	10,022,856	13,966,690	6,880,057