Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating expenses:
Research and development	$ 1,143	$ 2,152
General and administrative	2,187	2,597
Total operating expenses	3,330	4,749
Loss from operations	(3,330)	(4,749)
Interest income, net	6	20
Other income (expense), net		(1)
Loss before income taxes	(3,324)	(4,730)
Provision for income taxes	0	0
Net loss	(3,324)	(4,730)
Other comprehensive loss, net of tax	(7)	(34)
Comprehensive loss	$ (3,331)	$ (4,764)
Loss per share:
Net loss per share, basic and diluted	$ (0.15)	$ (0.30)
Weighted average common shares outstanding:
Basic and diluted	21,615,626	15,670,800