Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2012

Derivative Instruments [Abstract]

Components of derivative instruments

	December 31, 2012		December 31, 2011
	(in thousands)
MHR Convertible Note	$	230	$	7,367
August 2007 Warrants		—		12
August 2009 Warrants		372		540
June 2010 MHR Warrants		79		351
August 2010 Warrants		535		735
August 2010 MHR Waiver Warrants		103		142
July 2011 Warrants		680		929
July 2011 MHR Waiver Warrants		90		123
	$	2,089	$	10,199