Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Grant revenue	$ 2,011	$ 692	$ 2,011	$ 692
Operating expenses:
Research and development	6,919	4,072	10,031	8,540
General and administrative	2,973	1,664	6,409	2,933
Total operating expenses	9,892	5,736	16,440	11,473
Operating loss	(7,881)	(5,044)	(14,429)	(10,781)
Other income (expense)
Interest income	64	1	88	2
Interest expense	(505)	(480)	(983)	(786)
Other income (expense), net	123	(25)	(563)	(73)
Change in fair value of earn-out liability	1,284	0	12,041	0
Loss on debt extinguishment		0	0	(492)
Total other income (expense)	966	(504)	10,583	(1,349)
Net loss	(6,915)	(5,548)	(3,846)	(12,130)
Comprehensive loss:
Net loss	(6,915)	(5,548)	(3,846)	(12,130)
Other comprehensive loss	(32)	0	(82)	0
Comprehensive loss	$ 6,947	$ (5,548)	$ (3,928)	$ (12,130)
Net loss per share attributable to common shareholders:
Net loss per share - Basic	$ (0.17)	$ (3.83)	$ (0.09)	$ (8.38)
Net loss per share - diluted	$ (0.17)	$ (3.83)	$ (0.09)	$ (8.38)
Weighted-average common shares outstanding:
Weighted average common shares outstanding - basic	41,118,727	1,450,159	40,984,273	1,447,626
Weighted average common shares outstanding - diluted	41,118,727	1,450,159	40,984,273	1,447,626