Condensed Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Condensed Statements of Comprehensive Loss [Abstract]
License and collaborations revenue	$ 1,711	$ 1,749
Operating expenses:
General and administrative	4,670	2,285
Research and development	4,749	5,595
Total operating expenses	9,419	7,880
Loss from operations	(7,708)	(6,131)
Fair value change in derivative liabilities	0	0
Other income, net	602	340
Loss before income taxes	(7,106)	(5,791)
Benefit (provision) for income taxes	0	0
Net loss	(7,106)	(5,791)
Other comprehensive loss, net of tax	0	0
Comprehensive loss	$ (7,106)	$ (5,791)
Net loss per share:
Basic (in dollars per share)	$ (0.29)	$ (0.28)
Diluted (in dollars per share)	$ (0.29)	$ (0.28)
Number of shares used in per share calculations:
Basic (in shares)	24,520,475	20,939,607
Diluted (in shares)	24,520,475	20,939,607