CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenue:
Total revenue	$ 614	$ 799
Expenses:
Research and development	6,201	5,361
General and administrative	6,105	5,047
Total expenses	12,306	10,408
Loss from operations	(11,692)	(9,609)
Other income (expense):
Gain on investment in related party	700	0
Change in fair value of warrants	0	(957)
Loan forgiveness income	0	333
Other income (expense), net	(3)	83
Total other income (expense)	697	(541)
Loss from operations before income taxes	(10,995)	(10,150)
Income tax provision	(36)	(56)
Net loss	$ (11,031)	$ (10,206)
Basic net loss per share (in dollars per share)	$ (2.33)	$ (4.30)
Diluted net loss per share (in dollars per share)	$ (2.33)	$ (4.30)
Number of shares used in per share calculations:
Basic (in shares)	4,731,833	2,373,265
Diluted (in shares)	4,731,833	2,373,265
Grant revenue
Revenue:
Total revenue	$ 614	$ 799