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28. Segment information (Tables)
12 Months Ended
Dec. 31, 2019
Segment Reporting [Abstract]  
Schedule of net sales by major product and services
     For the years ended December 31, 
     2019   2018   2017 
  Sales of PV components  $80,941   $93,547   $111,795 
  Sales of pre-development solar project   (2,835)   15,794     
  Sales of PV project assets   9,563    10,809    6,042 
  Electricity revenue with PPAs   3,368    3,043    2,793 
  Bitcoin mining related business   4,197    1,052     
  Sales of hays and others   2,649    1,337    890 
     $97,883   $125,582   $121,520 
Schedule of net sales by geographic location

Net sales by geographic location are as follows:

 

      For the years ended December 31,  
  Location (a)   2019     2018     2017  
  United Kingdom   $ 979     $ 932     $ 6,903  
  Australia     80,518       91,381       112,174  
  United States     4,320       18,721        
  Greece     1,138       378        
  Japan     9,563       12,437       511  
  Italy     1,365       1,733       1,932  
      $ 97,883     $ 125,582     $ 121,520  

 

  (a) Sales are attributed to countries based on location of customers.
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,

2019

   

December 31,

2018

 
  Greece   $ 18,121     $ 2,637  
  United States     16,556       16,368  
  Italy     2,950       9,038  
  Japan     2        
  UK     9,657       9,642  
  Canada     1,190        
  Australia     1,952       2,285  
      $ 50,428     $ 39,970