Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
General and administrative expense	$ 2,028	$ 2,603	$ 5,560	$ 5,660
Operating loss	(2,028)	(2,603)	(5,560)	(5,660)
Other income (loss), net	(2,658)	3,118	(6,225)	1,233
Interest income	52	763	157	1,636
Interest expense		(5,682)		(8,217)
Equity income (loss), net	(5,277)	40,497	(14,291)	68,764
Net income (loss) before income taxes	(9,911)	36,093	(25,919)	57,756
Income tax benefit (expense)	0	0	0	0
Net income (loss)	$ (9,911)	$ 36,093	$ (25,919)	$ 57,756
Net income (loss) per share:
Basic (in dollars per share)	$ (0.48)	$ 1.75	$ (1.25)	$ 2.80
Diluted (in dollars per share)	$ (0.48)	$ 1.75	$ (1.25)	$ 2.80
Weighted average shares used in computing income (loss) per share:
Basic (in shares)	20,720	20,628	20,703	20,606
Diluted (in shares)	20,720	20,658	20,703	20,606