CONDENSED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Revenues	$ 4	$ 4	$ 6	$ 4
Operating expenses:
Research and development	180	5,186	306	11,689
General and administrative	990	3,045	2,607	6,213
Gain on lease modification	0	(245)	0	(245)
Total operating expenses	1,170	7,986	2,913	17,657
Loss from operations	(1,166)	(7,982)	(2,907)	(17,653)
Other income (expense):
Interest expense	0	(1,068)	0	(1,921)
Other income, net	37	277	97	753
Other income (expense), net	37	(791)	97	(1,168)
Net loss	$ (1,129)	$ (8,773)	$ (2,810)	$ (18,821)
Net loss per share , basic	$ (0.71)	$ (5.49)	$ (1.75)	$ (11.78)
Net loss per share , diluted	$ (0.71)	$ (5.49)	$ (1.75)	$ (11.78)
Weighted average common shares outstanding, basic	1,601,252	1,598,650	1,601,252	1,598,258
Weighted average common shares outstanding, diluted	1,601,252	1,598,650	1,601,252	1,598,258