Net income (loss) per share (Tables)

9 Months Ended

Sep. 30, 2012

Net income (loss) per share [Abstract]

Basic and diluted loss per share

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(in thousands except per						(in thousands except per
	share data)						share data)
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	)

Potential shares of common stock excluded from diluted net income per share

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
Options to purchase common shares		3,454,660		3,200,650		1,532,910		3,200,650
Outstanding warrants		17,443,727		17,843,727		17,443,727		17,843,727
MHR convertible note payable		8,087,809		7,246,873		8,087,809		7,246,873
		28,986,196		28,291,250		27,064,446		28,291,250