Condensed Consolidated Statements of Operations (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating expenses:
Research and development	$ 4,704	$ 3,571
General and administrative	2,635	2,260
Total operating expenses	7,339	5,831
Loss from operations	(7,339)	(5,831)
Other expense, net	(83)	(555)
Loss before income tax expense	(7,422)	(6,386)
Income tax expense		(16)
Net loss	$ (7,422)	$ (6,402)
Net loss per share - basic and diluted	$ (0.14)	$ (0.90)
Basic and diluted weighted average shares outstanding	51,313	7,122