Condensed Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating expenses:
Research and development	$ 2,787	$ 4,632	$ 9,971	$ 16,828
General and administrative	3,815	4,347	11,209	14,560
Impairment of long-lived assets		5,602	0	5,602
Total operating expenses	6,602	14,581	21,180	36,990
Loss from operations	(6,602)	(14,581)	(21,180)	(36,990)
Interest income	396	689	1,424	2,349
Interest expense		(566)		(2,451)
Gain (loss) on warrant liability	(215)	253	2,407	2,283
Other expense, net	(60)	(577)	(201)	(711)
Net loss	(6,481)	(14,782)	(17,550)	(35,520)
Other comprehensive (loss) gain
Unrealized gain on marketable debt securities	74	81	63	196
Comprehensive loss	$ (6,407)	$ (14,701)	$ (17,487)	$ (35,324)
Net loss per share, basic	$ (0.38)	$ (1.01)	$ (1.04)	$ (2.46)
Net loss per share, diluted	$ (0.38)	$ (1.01)	$ (1.04)	$ (2.46)
Weighted-average number of shares used in computing net loss per share, basic	16,849,283	14,598,218	16,816,706	14,446,672
Weighted-average number of shares used in computing net loss per share, diluted	16,849,283	14,598,218	16,816,706	14,446,672