Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Operating expenses
Research and development	$ 15,265	$ 21,453
General and administrative	9,844	10,806
Change in fair value of contingent consideration	(712)	(731)
Total operating expenses	24,397	31,528
Operating loss	(24,397)	(31,528)
Other income
Change in fair value of warrant liability	30	508
Interest income	300	110
Total other income, net	330	618
Net loss	$ (24,067)	$ (30,910)
Net loss per common share basic	$ (2.87)	$ (5.81)
Net loss per common share diluted	$ (2.87)	$ (5.81)
Weighted-average common shares outstanding used to calculate basic net loss per common share	8,397,088	5,318,022
Weighted-average common shares outstanding used to calculate diluted net loss per common share	8,397,088	5,318,022