Consolidated Consolidated Statements of Operations (Current Period Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Operating expenses
Research and development	$ 4,157	$ 3,748
General and administrative	3,257	3,232
Total operating expenses	7,414	6,980
Operating loss	(7,414)	(6,980)
Interest income	720	1,138
Other expense, net	(24)	(36)
Loss before income taxes	(6,718)	(5,878)
Income taxes benefit	0	0
Net loss	$ (6,718)	$ (5,878)
Net loss per share of common stock - basic (in dollars per share)	$ (0.05)	$ (0.05)
Net loss per share of common stock - diluted (in dollars per share)	$ (0.05)	$ (0.05)
Weighted average shares outstanding used to compute net loss per share- basic (in shares)	129,170,004	125,319,778
Weighted average shares outstanding used to compute net loss per share - diluted (in shares)	129,170,004	125,319,778