Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
General and administrative expense	$ 2,463	$ 3,532
Operating loss	(2,463)	(3,532)
Other income (loss), net	706	(3,567)
Interest income	53	105
Equity income (loss), net	19,329	(9,014)
Net income (loss) before income taxes	17,625	(16,008)
Income tax benefit (expense)	0	0
Net income (loss)	$ 17,625	$ (16,008)
Net income (loss) per share:
Basic (in dollars per share)	$ 0.84	$ (0.77)
Diluted (in dollars per share)	$ 0.84	$ (0.77)
Weighted average shares used in computing income (loss) per share:
Basic (in shares)	20,902	20,686
Diluted (in shares)	20,930	20,686