Restatement of previously issued financial statements (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Intangible assets, net of accumulated amortization of $118	$ 1,795	$ 0
Total assets	7,651	4,433
Accrued expenses	272	502
Derivative liability - warrants	7,166	0
Total liabilities	7,747	786
Preferred Stock, Series A Convertible Preferred, $0.001 par value; 1,394,766 shares authorized, issued and outstanding at December 31, 2012	47
Stockholders' (deficit) / equity
Preferred Stock, Convertible Preferred Series A , $0.001 par value; 1,394,766 shares authorized, issued and outstanding at December 31, 2012	0	0
Additional paid in capital	282,998	283,240
Accumulated deficit	(283,631)	(280,027)
Total stockholders' deficit	(911)	(1,646)
Non-controlling interests	768	5,293
Total equity	(143)	3,647	9,926
Total stockholders' equity, liabilities and non-controlling interest	7,651	4,433
Scenario, Previously Reported [Member]
Intangible assets, net of accumulated amortization of $118	1,704
Total assets	7,560
Accrued expenses	196
Derivative liability - warrants	0
Total liabilities	505
Preferred Stock, Series A Convertible Preferred, $0.001 par value; 1,394,766 shares authorized, issued and outstanding at December 31, 2012	0
Stockholders' (deficit) / equity
Preferred Stock, Convertible Preferred Series A , $0.001 par value; 1,394,766 shares authorized, issued and outstanding at December 31, 2012	1
Additional paid in capital	295,050
Accumulated deficit	(282,447)
Total stockholders' deficit	6,326
Non-controlling interests	729
Total equity	7,055
Total stockholders' equity, liabilities and non-controlling interest	$ 7,560