CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	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 13)	37	1,502			1,539
Registered offering stock units, net (Note 13) (shares)	3,692,000
Private placement stock units, net (Note 13)	58	2,729			2,787
Private placement stock units, net (Note 13) (shares)	5,800,000
Reclassification to reflect warrant liability (Note 13)		(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		179			179
KELTIP mark-to-market		23			23
Net loss			(3,431)	(80)	(3,511)
Balance at Mar. 31, 2015	$ 532	$ 484,399	$ (455,426)	$ (80)	$ 29,425
Balance (in shares) at Mar. 31, 2015	53,162,833