Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 1,100	$ 359
Prepaid expenses and other current assets	141	61
Investments available for sale	495	444
Notes receivable	640	1,575
Total current assets	2,376	2,439
Non-current assets
Restricted cash		39
Property and equipment, at cost, net	25	35
Intangible assets, net		730
Goodwill		1,496
Note receivable	45
Investments, at cost	1,530	1,380
Total assets	3,976	6,119
Current liabilities
Accounts payable	111	63
Accrued expenses	16	15
Other payables		1
Total liabilities	127	79
Commitments and contingencies
Stockholders' equity
Common stock, $0.001 par value; 75,000,000 shares authorized; 25,847,017 and 17,928,221 shares issued and outstanding at June 30, 2016 and December 31, 2015, respectively	26	18
Additional paid-in capital	315,430	311,167
Accumulated other comprehensive income / (loss)	81	(1,206)
Accumulated deficit	(311,374)	(303,944)
Total stockholders' equity	4,163	6,035
Non-controlling interests	(314)	5
Total equity	3,849	6,040
Total equity, liabilities, redeemable convertible preferred stock and non-controlling interest	3,976	6,119
Series A Convertible Preferred Stock [Member]
Redeemable Convertible Preferred stock - temporary equity
Preferred stock, Series A Convertible Preferred, $0.001 par value, 1,500,000 shares authorized at June 30, 2016 and December 31, 2015; No shares outstanding at June 30, 2016 and 10,608 shares outstanding at December 31, 2015.
Undesignated Preferred Stock [Member]
Stockholders' equity
Undesignated Preferred stock, $0.001 par value, 8,583,840 shares authorized at June 30, 2016 and December 31, 2015. No shares issued and outstanding at June 30, 2016 and December 31, 2015