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, 2013	$ 435	$ 494,647	$ (448,626)		$ 46,456
Balance (in shares) at Dec. 31, 2013	43,530,833
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued	$ 2	924			926
Stock compensation accrued (in shares)	140,000
KELTIP mark-to-market		12			12
Registered offering stock units, net (Note 14)	$ 37	1,502			1,539
Registered offering stock units, net (Note 14) (shares)	3,692,000
Private placement stock units, net (Note 14)	$ 58	2,729			2,787
Private placement stock units, net (Note 14) (shares)	5,800,000
Reclassification to reflect warrant liability (Note 14)		(15,617)	15,454		(163)
Net loss			(18,823)		(18,823)
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		273			273
KELTIP mark-to-market		33			33
Unrealized loss on marketable securities, net of tax				$ (37)	(37)
Net loss			(7,281)		(7,281)
Balance at Jun. 30, 2015	$ 532	$ 484,503	$ (459,276)	$ (37)	$ 25,722
Balance (in shares) at Jun. 30, 2015	53,162,833