UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue
Total revenue	$ 5	$ 5	$ 10	$ 3,760
Operating expense
Research and development	536	1,093	1,529	3,025
General and administrative	1,557	2,306	4,043	4,812
Total operating expense	2,093	3,399	5,572	7,837
Loss from operations	(2,088)	(3,394)	(5,562)	(4,077)
Other income (expense)
Interest expense, net	(1)		(1)	(1)
Gain on sale of subsidiary			1
Net loss	(2,089)	(3,394)	(5,562)	(4,078)
Loss (gain) attributable to noncontrolling interest	(3)	6		17
Deemed dividend - accretion of discount and redemption feature of redeemable convertible preferred stock		(488)		(488)
Net loss available to common stockholders	$ (2,092)	$ (3,876)	$ (5,562)	$ (4,549)
Net loss per share available to common stockholders, basic	$ (0.49)	$ (1.55)	$ (1.3)	$ (1.82)
Net loss per share available to common stockholders, diluted	$ (0.49)	$ (1.55)	$ (1.3)	$ (1.82)
Weighted-average number of common shares outstanding used to compute net loss per share, basic	4,271,759	2,497,450	4,271,759	2,497,450
Weighted-average number of common shares outstanding used to compute net loss per share, diluted	4,271,759	2,497,450	4,271,759	2,497,450
License [Member]
Revenue
Total revenue	$ 5	$ 5	$ 10	$ 3,760