Condensed Consolidated 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 expense:
Research and development	$ 611	$ 3,314	$ 5,163	$ 10,837
General and administrative	2,411	2,494	10,907	12,344
Settlement expense	0	0	0	250
Total operating expenses	3,022	5,808	16,070	23,431
Loss from operations	(3,022)	(5,808)	(16,070)	(23,431)
Other (income) expense:
Interest income	(6)	(119)	(40)	(420)
Interest expense	0	40	230	40
Convertible note default penalty	0	0	849	0
Change in fair value of convertible notes payable	(1,355)	359	(1,014)	2,794
Change in fair value of warrant liabilities	(165)	(26)	(174)	(27)
Loss on convertible note redemptions	127	0	127	0
Total other (income) expense	(1,399)	254	(22)	2,387
Net loss	(1,623)	(6,062)	(16,048)	(25,818)
Comprehensive loss:
Change in fair value of convertible note attributed to credit risk	3	0	3	22
Other comprehensive loss	3	0	3	22
Comprehensive loss	$ (1,626)	$ (6,062)	$ (16,051)	$ (25,840)
Net loss per share:
Basic and diluted (in dollars per share)	$ (0.15)	$ (0.74)	$ (1.59)	$ (3.48)
Weighted average common shares outstanding:
Basic and diluted (in shares)	10,973,697	8,194,696	10,108,859	7,411,418