Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenue	$ 0	$ 0
Operating expenses:
Research and development	14,418	12,757
General and administrative	8,386	6,785
Depreciation and amortization	164	200
Total operating expenses	22,968	19,742
Loss from operations	(22,968)	(19,742)
Other income:
Gain from change in fair value of warrant liability	6,728	2,346
Other income, net	40	28
Interest income, net	306	13
Net loss	$ (15,894)	$ (17,355)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.59)	$ (1.76)
Weighted average common shares outstanding, basic and diluted (in shares)	26,875,927	9,845,685
Net loss	$ (15,894)	$ (17,355)
Other comprehensive (loss) income:
Foreign currency translation	(24)	34
Comprehensive loss	$ (15,918)	$ (17,321)