Restatement of previously issued financial statements (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Intangible assets, net of accumulated amortization of $68	$ 1,845	$ 1,845	$ 0	[1]
Total assets	7,349		4,433	[1]
Derivative liability - warrants	935		0	[1]
Total liabilities	4,123		786	[1]
Additional paid in capital	289,249		283,240	[1]
Accumulated deficit	(282,498)		(280,027)	[1]
Total stockholders' equity	50		(1,646)	[1]
Non-controlling interests	3,176		5,293	[1]
Total equity	3,226		3,647	[1]
Total stockholders' equity, liabilities and non-controlling interest	7,349		4,433	[1]
Scenario, Previously Reported [Member]
Intangible assets, net of accumulated amortization of $68	1,753
Total assets	7,257
Derivative liability - warrants	0
Total liabilities	3,188
Additional paid in capital	290,049
Accumulated deficit	(282,413)
Total stockholders' equity	935
Non-controlling interests	3,134
Total equity	4,069
Total stockholders' equity, liabilities and non-controlling interest	$ 7,257

[1] Derived from audited financial information