CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Royalties, net	$ 8	$ 2	$ 18	$ 158
Total revenues	8	2	18	158
Operating expenses:
General and administrative	415	327	901	873
Total operating expenses	415	327	901	873
Operating loss and loss before income tax expense	(407)	(325)	(883)	(715)
Income tax expense	0	0	2	2
Net loss	$ (407)	$ (325)	$ (885)	$ (717)
Loss per common share
Basic	$ (0.01)	$ (0.01)	$ (0.02)	$ (0.02)
Diluted	$ (0.01)	$ (0.01)	$ (0.02)	$ (0.02)
Weighted-average number of shares - basic	44,215	44,215	44,215	44,215
Weighted-average number of shares - diluted	44,215	44,215	44,215	44,215