v3.8.0.1
Segment information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Revenues $ 51 $ 5,069  
Gross (loss) profit (1,292) 202 $ 95
Operating expenses 10,574 4,170 1,629
Loss from operations (11,866) (3,968) (1,534)
Other income (expenses) (27) (1,394) (884)
Loss before provision for income taxes (11,893) (5,362)  
Income tax benefit (679) (315)
Net loss (11,214) (5,047) $ (2,418)
Identifiable long-lived assets 42,769 25,295  
Total assets 98,453 100,272  
Green Energy Product Services [Member]      
Revenues 9 2  
Gross (loss) profit (1,308) 2  
Operating expenses (6,009) 1,272  
Loss from operations (7,317) (1,270)  
Other income (expenses) (13) (9)  
Loss before provision for income taxes (7,330) (1,279)  
Income tax benefit 350 315  
Net loss (6,980) (964)  
Identifiable long-lived assets 23,888 25,290  
Total assets 56,696 61,794  
VR products and services [Member]      
Revenues    
Gross (loss) profit    
Operating expenses (2,740)    
Loss from operations (2,740)    
Other income (expenses)    
Loss before provision for income taxes (2,740)    
Income tax benefit 329    
Net loss (2,411)    
Identifiable long-lived assets 18,370    
Total assets 37,287    
Money lending services [Member]      
Revenues    
Gross (loss) profit    
Operating expenses    
Loss from operations    
Other income (expenses)    
Loss before provision for income taxes    
Income tax benefit    
Net loss    
Identifiable long-lived assets 508    
Total assets 2,376    
Corporate unallocated [Member]      
Revenues [1]    
Gross (loss) profit [1]    
Operating expenses [1] (773) 1,617  
Loss from operations [1] (773) (1,617)  
Other income (expenses) [1] (150) (1,522)  
Loss before provision for income taxes [1] (923) (3,139)  
Income tax benefit [1]  
Net loss [1] (923) (3,139)  
Identifiable long-lived assets [1]  
Total assets [1] 9 36,513  
Operating Segments [Member] | LCDLED Product [Member]      
Revenues 42 5,067  
Gross (loss) profit 16 200  
Operating expenses (1,052) 1,281  
Loss from operations (1,036) (1,081)  
Other income (expenses) 136 137  
Loss before provision for income taxes (900) (944)  
Income tax benefit  
Net loss (900) (944)  
Identifiable long-lived assets 3 5  
Total assets $ 2,085 $ 1,965  
[1] The Company does not allocate its assets located and expenses incurred outside Hong Kong and China to its reportable segments because these assets and activities are managed at a corporate level.