Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating expenses:
Research and development	$ 6,029	$ 16,300	$ 13,321	$ 29,875
General and administrative	3,805	3,813	8,151	7,606
Restructuring charges	0	0	5,107	0
Total operating expenses	9,834	20,113	26,579	37,481
Loss from operations	(9,834)	(20,113)	(26,579)	(37,481)
Other income (expense), net	(271)	187	(580)	280
Loss before income taxes	(10,105)	(19,926)	(27,159)	(37,201)
Income tax expense	5	0	10	0
Net loss	$ (10,110)	$ (19,926)	$ (27,169)	$ (37,201)
Net loss per share, basic (in dollars per share)	$ (0.37)	$ (0.86)	$ (1.06)	$ (1.60)
Net loss per share, diluted (in dollars per share)	$ (0.37)	$ (0.86)	$ (1.06)	$ (1.60)
Weighted average common shares outstanding, basic (in shares)	27,575,596	23,258,759	25,608,008	23,237,600
Weighted average common shares outstanding, diluted (in shares)	27,575,596	23,258,759	25,608,008	23,237,600