Net income (loss) per share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Basic and diluted earnings per share
Basic net loss	$ (4,587)	$ (17,606)	$ (2,556)	$ (4,764)
Effect of dilutive securities - MHR convertible note assumed conversion	0	0	0	0
Numerator for diluted net loss per share after assumed note conversion	$ (4,587)	$ (17,606)	$ (2,556)	$ (4,764)
Weighted average common shares outstanding:	60,687,478	60,122,747	60,687,478	54,811,423
Dilutive securities
Options	0	0	0	0
Warrants	0	0	0	0
Diluted weighted average common shares outstanding and assumed conversion	60,687,478	60,122,747	60,687,478	54,811,423
Basic net loss per share	$ (0.08)	$ (0.29)	$ (0.04)	$ (0.09)
Diluted net loss per share	$ (0.08)	$ (0.29)	$ (0.04)	$ (0.09)