CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating expenses
Research and development	$ 5,910	$ 6,578
General and administrative	4,533	4,330
Total operating expenses	10,443	10,908
Net operating loss	(10,443)	(10,908)
Other income
Interest income	3	26
Total other income	3	26
Net loss	$ (10,440)	$ (10,882)
Net loss per share, basic (in dollars per share)	$ (1.55)	$ (2.83)
Net loss per share, diluted (in dollars per share)	$ (1.55)	$ (2.83)
Weighted average number of common shares outstanding, basic (in shares)	6,725	3,847
Weighted average number of common shares outstanding, diluted (in shares)	6,725	3,847