Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating expenses:
Research and development	$ 928	$ 940	$ 1,940	$ 1,991
General and administrative	1,382	1,255	2,594	2,632
Total operating expenses	2,310	2,195	4,534	4,623
Operating loss	(2,310)	(2,195)	(4,534)	(4,623)
Other income:
Interest income	1	4	2	18
Other income		2		2
Other income	1	6	2	20
Net loss	$ (2,309)	$ (2,189)	$ (4,532)	$ (4,603)
Net loss per share, basic and diluted (in dollars per share)	$ (0.07)	$ (0.49)	$ (0.14)	$ (1.70)
Weighted average number of common shares outstanding, basic and diluted (In Shares)	34,258,458	4,453,831	31,879,257	2,714,976