Consolidated Statements of Operations $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) $ / shares shares	Jun. 30, 2019 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) $ / shares shares	Jun. 30, 2019 USD ($) $ / shares shares
Operating expenses:
Research and development	$ 940	$ 1,716	$ 1,991	$ 2,826
General and administrative	1,255	1,532	2,632	3,200
Total operating expenses	2,195	3,248	4,623	6,026
Operating loss	(2,195)	(3,248)	(4,623)	(6,026)
Other income / (expense):
Interest income	4	72	18	171
Other income	2	32	2	76
Other income / (expense), net	6	104	20	247
Net loss	$ (2,189)	$ (3,144)	$ (4,603)	$ (5,779)
Net loss per share, basic and diluted (in dollars per share) | $ / shares	$ (0.49)	$ (10.13)	$ (1.70)	$ (18.62)
Weighted average number of common shares outstanding, basic and diluted (In Shares) | shares	4,453,831	310,378	2,714,976	310,363