Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue
Total revenue	$ 1,092	$ 256
Operating expenses
Research and development	13,002	5,884
General and administrative	3,088	2,380
Total operating expenses	16,090	8,264
Loss from operations	(14,998)	(8,008)
Other income (expense), net:
Interest income	10	9
Change in fair value of warrant liability	1,228	0
Other income (expense), net	703	(5)
Total other income (expense)	1,941	4
Net loss	$ (13,057)	$ (8,004)
Net loss per share - basic and diluted (in dollars per share)	$ (0.62)	$ (0.44)
Weighted-average common shares used to compute basic and diluted net loss per share (in shares)	21,130	18,067
Collaborative Arrangement [Member]
Revenue
Total revenue	$ 1,092	$ 256