Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Research and development service revenue, related party	$ 31	$ 31	$ 63	$ 63
Operating expenses:
Research and development	5,022	3,292	10,438	6,048
General and administrative	3,762	2,040	7,364	3,972
Total operating expenses	8,784	5,332	17,802	10,020
Loss from operations	(8,753)	(5,301)	(17,739)	(9,957)
Other income (expense):
Grant income		605		796
Interest, dividend and investment income (expense), net	(365)	(15)	(540)	(28)
Change in fair value of warrant liability	4,969	(12,369)	13,256	(12,369)
Total other income (expense), net	4,604	(11,779)	12,716	(11,601)
Net loss	$ (4,149)	$ (17,080)	$ (5,023)	$ (21,558)
Net loss per share attributed to common stockholders, basic	$ (0.14)	$ (1.46)	$ (0.17)	$ (1.85)
Net loss per share attributed to common stockholders, diluted	$ (0.14)	$ (1.46)	$ (0.17)	$ (1.85)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic	28,810,224	11,720,530	28,750,431	11,684,374
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted	28,810,224	11,720,530	28,750,431	11,684,374