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	$ 1,499	$ 1,379
General and administrative	3,248	2,152
Total operating expenses	4,747	3,531
Operating loss	(4,747)	(3,531)
Other expense, net	(39)	(7)
Loss before income taxes	(4,786)	(3,538)
Income taxes	0	0
Net loss	$ (4,786)	$ (3,538)
Loss per common share - basic and diluted (in dollars per share)	$ (0.04)	$ (0.04)
Weighted average shares outstanding - basic and diluted (in shares)	126,624	92,587