Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating expenses:
Research and development	$ 4,415	$ 4,704
General and administrative	2,767	2,635
Total operating expenses	7,182	7,339
Loss from operations	(7,182)	(7,339)
Other income (expense)	20	(83)
Loss before income tax expense	(7,162)	(7,422)
Income tax expense	0	0
Net loss	$ (7,162)	$ (7,422)
Net loss per share - basic and diluted	$ (0.07)	$ (0.14)
Basic and diluted weighted average shares outstanding	100,858	51,313