CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating expenses:
License costs	$ 50	$ 0
Research and development	1,674	1,782
General and administrative	3,592	4,514
Total operating expenses	5,316	6,296
Loss from operations	(5,316)	(6,296)
Other expense, net:
Change in fair value of warrant liabilities	(45)	(1,322)
Loss on non-controlling investment	(51)	(615)
Other income (expense), net	1	(1,142)
Total other expense, net	(95)	(3,079)
Loss before income taxes	(5,411)	(9,375)
Provision for income taxes	(5)	0
Net loss	$ (5,416)	$ (9,375)
Net loss per common share - basic (in dollars per share)	$ (1.06)	$ (3.5)
Net loss per common share - diluted (in dollars per share)	$ (1.06)	$ (3.5)
Weighted average shares outstanding - basic (in shares)	5,127	2,681
Weighted average shares outstanding - diluted (in shares)	5,127	2,681