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
Revenues:
Royalties and milestones, net	$ 0	$ 0	$ 0	$ 0
Total revenues	0	0	0	0
Operating expenses:
General and administrative	318	303	603	600
Total operating expenses	318	303	603	600
Operating loss	(318)	(303)	(603)	(600)
Interest and dividend income	553	90	1,000	92
Income (loss) before income tax benefit	235	(213)	397	(508)
Income tax (expense) benefit	(52)		(17)	4
Net income (loss)	183	(213)	380	(504)
Accretion of dividend on Series C preferred stock	(531)	(531)	(1,062)	(1,062)
Net loss available to common shareholders	$ (348)	$ (744)	$ (682)	$ (1,566)
Loss per common share
Basic loss per common share	$ 0.00	$ (0.01)	$ (0.01)	$ (0.02)
Diluted loss per common share	$ 0.00	$ (0.01)	$ (0.01)	$ (0.02)
Weighted-average number of shares - basic	74,215	74,215	74,215	74,215
Weighted-average number of shares - diluted	74,215	74,215	74,215	74,215