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28. Segment information (Tables)
12 Months Ended
Dec. 31, 2018
Segment Reporting [Abstract]  
Schedule of net sales by major product and services

Net sales by major product and services are as follows:

 

    For the years ended December 31,  
    2018     2017     2016  
Sales of PV components   $ 93,547     $ 111,795     $ 86,477  
Sales of pre-development solar project     15,794              
Sales of PV project assets     10,809       6,042       14,914  
Electricity revenue with PPAs     3,043       2,793       12,311  
Bitcoin mining equipment sale and hosting service     1,052              
Others     1,337       890       900  
    $ 125,582     $ 121,520     $ 114,602  

Schedule of net sales by geographic location
   For the years ended December 31, 
Location (a)  2018   2017   2016 
United Kingdom  $932   $6,903   $694 
Australia   91,381    112,174    81,241 
United States   18,721        6,622 
Greece   378        8,737 
Japan   12,437    511    12,893 
Italy   1,733    1,932    1,740 
Germany           2,675 
   $125,582   $121,520   $114,602 
Schedule of geographic information for long-lived assets

Geographic information, which is based upon physical location, for long-lived assets was as follows:

 

Location  

December 31,

2018

   

December 31,

2017

 
Greece   $ 2,637     $ 2,997  
United States     16,368       16,368  
Italy     9,038       9,952  
Japan            
UK     9,642       10,578  
Australia     2,285       2,853  
Germany            
    $ 39,970     $ 42,748