CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive income (loss)	Total
Balance at Dec. 31, 2014	$ 532	$ 484,197	$ (451,995)		$ 32,734
Balance (in shares) at Dec. 31, 2014	53,162,833
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued		453			453
KELTIP mark-to-market		40			40
KELTIP shares issued	$ 2	52			54
KELTIP shares issued ( in shares)	172,500
Unrealized loss on marketable equity securities, net of tax				$ (127)	(127)
Net loss			(25,383)		(25,383)
Balance at Dec. 31, 2015	$ 534	484,742	(477,378)	(127)	7,771
Balance (in shares) at Dec. 31, 2015	53,335,333
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued		32			32
Shares issued on conversion of Sentient Note	$ 233	5,138			5,371
Shares issued on conversion of Sentient Note, Shares	23,355,000
Unrealized loss on marketable equity securities, net of tax				82	82
Net loss			(6,287)		(6,287)
Balance at Mar. 31, 2016	$ 767	$ 489,912	$ (483,665)	$ (45)	$ 6,969
Balance (in shares) at Mar. 31, 2016	76,690,333