Consolidated Consolidated Statements of Operations (Current Period Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Operating expenses
Research and development	$ 5,502	$ 3,553	$ 9,659	$ 7,302
General and administrative	3,538	3,552	6,795	6,784
Total operating expenses	9,040	7,105	16,454	14,086
Operating loss	(9,040)	(7,105)	(16,454)	(14,086)
Interest income	645	1,073	1,365	2,211
Other expense, net	(28)	(17)	(52)	(52)
Loss before income taxes	(8,423)	(6,049)	(15,141)	(11,927)
Income taxes benefit	0	0	0	0
Net loss	$ (8,423)	$ (6,049)	$ (15,141)	$ (11,927)
Net loss per share of common stock - basic (in dollars per share)	$ (0.07)	$ (0.05)	$ (0.12)	$ (0.1)
Net loss per share of common stock - diluted (in dollars per share)	$ (0.07)	$ (0.05)	$ (0.12)	$ (0.1)
Weighted average shares outstanding used to compute net loss per share- basic (in shares)	129,170,425	125,732,140	129,170,216	125,525,959
Weighted average shares outstanding used to compute net loss per share - diluted (in shares)	129,170,425	125,732,140	129,170,216	125,525,959