CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues:
Royalties	$ 151	$ 1,965	$ 8,366	$ 7,461
Miscellaneous income	0	21	0	63
Total revenues	151	1,986	8,366	7,524
Operating expenses:
General and administrative	335	376	1,021	1,533
Total operating expenses	335	376	1,021	1,533
Operating (loss) income and (loss) income before income tax (benefit) expense	(184)	1,610	7,345	5,991
Income tax (benefit) expense	(337)	674	2,362	2,503
Net income	$ 153	$ 936	$ 4,983	$ 3,488
Earnings per common share
Basic (in dollars per share)	$ 0.00	$ 0.02	$ 0.11	$ 0.08
Diluted (in dollars per share)	$ 0.00	$ 0.02	$ 0.11	$ 0.08
Weighted-average shares - basic	44,215	44,214	44,215	44,214
Weighted-average shares - diluted	44,215	44,214	44,215	44,214