Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues	$ 0	$ 0
Operating expenses:
Research and development	5,687	4,620
General and administrative	2,637	2,422
Depreciation and amortization	30	32
Total operating expenses	8,354	7,074
Loss from operations	(8,354)	(7,074)
Other income:
Gain from change in fair value of warrant liability	39	160
Other income, net	8	5
Interest income, net	392	42
Net loss	$ (7,915)	$ (6,867)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.28)	$ (0.24)
Weighted average common shares outstanding, basic and diluted (in shares)	28,749,974	28,578,338
Net loss	$ (7,915)	$ (6,867)
Other comprehensive loss:
Foreign currency translation	(4)	12
Comprehensive loss	$ (7,919)	$ (6,855)