Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
General and administrative expense	$ 2,275	$ 2,262	$ 7,835	$ 7,922
Operating loss	(2,275)	(2,262)	(7,835)	(7,922)
Other income (loss), net	(820)	8,777	(7,045)	10,010
Interest income	52	234	209	1,870
Interest expense	0	(5,806)	0	(14,023)
Equity income (loss), net	(1,300)	(3,440)	(15,591)	65,324
Net income (loss) before income taxes	(4,343)	(2,497)	(30,262)	55,259
Income tax benefit (expense)	0	0	0	0
Net income (loss)	$ (4,343)	$ (2,497)	$ (30,262)	$ 55,259
Net income (loss) per share:
Basic (in dollars per share)	$ (0.21)	$ (0.12)	$ (1.46)	$ 2.68
Diluted (in dollars per share)	$ (0.21)	$ (0.12)	$ (1.46)	$ 2.68
Weighted average shares used in computing income (loss) per share:
Basic (in shares)	20,786	20,657	20,731	20,623
Diluted (in shares)	20,786	20,657	20,731	20,623