Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenues
Revenues	$ 1,500	$ 6,200
Operating expenses
Research and development	22,764	23,578
General and administrative	5,717	7,010
Total operating expenses	28,481	30,588
Other operating expense
Loss on dispositions, net	0	(478)
Total other operating expense	0	(478)
Loss from operations	(26,981)	(24,866)
Other income (expense):
Interest income, net of interest expense	46	28
Change in fair value of warrant and private placement option liabilities	1,964	15,126
Other income	0	7
Total other income	2,010	15,161
Loss before tax	(24,971)	(9,705)
Income tax expense	(2)	0
Net loss	$ (24,973)	$ (9,705)
Net loss per common share attributable to common shareholders, basic (in dollars per share)	$ (0.81)	$ (0.84)
Net loss per common share attributable to common shareholders, diluted (in dollars per share)	$ (0.81)	$ (0.84)
Weighted-average shares outstanding-basic (in shares)	30,828,247	11,504,294
Weighted-average shares outstanding- diluted (in shares)	30,828,247	11,504,294
Net loss	$ (24,973)	$ (9,705)
Other comprehensive income (loss):
Foreign currency translation adjustment	(16)	1
Comprehensive loss	(24,989)	(9,704)
Supply agreement
Revenues
Revenues	0	700
License revenue
Revenues
Revenues	$ 1,500	$ 5,500