Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Expenses:
Research and development	$ 5,345	$ 4,410
General and administrative	2,988	4,669
Total operating expenses	8,333	9,079
Operating loss	(8,333)	(9,079)
Interest income	1	50
Interest expense	(13)	(41)
Other income, net	218	109
Total other income, net	206	118
Net loss	$ (8,127)	$ (8,961)
Net loss per common share
Basic and diluted (in dollars per share)	$ (0.29)	$ (0.51)
Weighted average number of common shares outstanding
Basic and diluted (in shares)	28,295	17,695