CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
General and administrative expense	$ 3,962	$ 4,177	$ 13,596	$ 14,485
Operating loss	(3,962)	(4,177)	(13,596)	(14,485)
Other income (loss), net	704	(246)	301	31,580
Interest income	398	482	1,487	1,494
Interest expense	(1,133)	(1,103)	(3,383)	(3,295)
Equity loss	(7,635)	(8,962)	(30,062)	(5,329)
Net income (loss) before income taxes	(11,628)	(14,006)	(45,253)	9,965
Income tax benefit (expense)	0	0	0	0
Net loss	$ (11,628)	$ (14,006)	$ (45,253)	$ 9,965
Net income (loss) per share:
Basic (in dollars per share)	$ (0.56)	$ (0.68)	$ (2.17)	$ 0.47
Diluted (in dollars per share)	$ (0.56)	$ (0.68)	$ (2.17)	$ 0.47
Weighted average shares used in computing income (loss) per share :
Basic (in shares)	20,919	20,678	20,892	21,042
Diluted (in shares)	20,919	20,678	20,892	21,418