CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS UNAUDITED - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue:
Revenue	$ 0	$ 103	$ 60	$ 252
Expenses:
Research and development	1,997	2,016	4,159	3,779
General and administrative	1,670	1,523	3,368	3,230
Total expenses	3,667	3,539	7,527	7,009
Loss from operations	(3,667)	(3,436)	(7,467)	(6,757)
Other income (expense):
Other income (expense), net	(14)	2	4	1
Total other income (expense)	(14)	2	4	1
Loss from operations before income taxes	(3,681)	(3,434)	(7,463)	(6,756)
Income tax provision	0	(9)	0	(18)
Net loss	$ (3,681)	$ (3,443)	$ (7,463)	$ (6,774)
Basic net loss per share (in USD per share)	$ (0.64)	$ (0.70)	$ (1.39)	$ (1.38)
Diluted net loss per share (in USD per share)	$ (0.64)	$ (0.70)	$ (1.39)	$ (1.38)
Number of shares used in per share calculations:
Basic (in shares)	5,729,012	4,900,298	5,366,324	4,894,638
Diluted (in shares)	5,729,012	4,900,298	5,366,324	4,894,638