Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Research and development	$ 2,110	$ 1,543	$ 5,288	$ 9,883
General and administrative	2,580	2,653	7,292	8,548
Loss on impairment of goodwill	0	454	3,058	12,090
Total operating expenses	4,690	4,650	15,638	30,521
Operating loss	(4,690)	(4,650)	(15,638)	(30,521)
Interest income	112	39	264	57
Interest expense	(13)	(14)	(38)	(40)
Other income, net	166	569	275	988
Total other income, net	265	594	501	1,005
Net loss	$ (4,425)	$ (4,056)	$ (15,137)	$ (29,516)
Net loss per common share
Basic and diluted (in dollars per share)	$ (0.86)	$ (6.51)	$ (4.5)	$ (49.94)
Weighted average number of common shares outstanding
Basic and diluted (in shares)	5,148	623	3,363	591