Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

13. Property and Equipment (Tables)

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13. Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2017
Property And Equipment Tables  
Schedule of property and equipment
Cost or valuation   Plant and
machinery
    Industrial and
commercial
equipment
    Office and
office-related
equipment
    Total  
Balance at January 1, 2015   $ 234,350     $ 989     $ 11,997     $ 247,336  
Additions     5,271             5,289       10,560  
Disposals     (134,448 )                 (134,448 )
Revaluations     (15,307 )     (91 )     (511 )     (15,909 )
Balance at December 31, 2015   $ 89,866     $ 898     $ 16,775     $ 107,539  
Additions                 1,480       1,480  
Disposals                        
Revaluations     (120 )     (22 )     (211 )     (353 )
Balance at December 31, 2016   $ 89,746     $ 876     $ 18,044     $ 108,666  
Additions     289             2,104       2,393  
Disposals     (1,207 )           (2,104 )     (3,311 )
Revaluations     457       150       831       1,438  
Balance at December 31, 2017   $ 89,285     $ 1,026     $ 18,875     $ 109,186  
Schedule of accumulated depreciation
Accumulated depreciation   Plant and
machinery
    Industrial and
commercial
equipment
    Office and
office-related
equipment
    Total  
Balance at January 1, 2015   $ 85,179     $ 108     $ 5,105     $ 90,392  
Depreciation charge for the year     469             3,114       3,583  
Balance at December 31, 2015   $ 85,648     $ 108     $ 8,219     $ 93,975  
Depreciation charge for the year     495             3,149       3,644  
Balance at December 31, 2016   $ 86,143     $ 108     $ 11,368     $ 97,619  
Depreciation charge for the year     855             3,098       3,953  
Balance at December 31, 2017   $ 86,998     $ 108     $ 14,466     $ 101,572  
                                 
Property and equipment, net at December 31, 2015   $ 4,218     $ 790     $ 8,556     $ 13,564  
                                 
Property and equipment, net at December 31, 2016   $ 3,603     $ 768     $ 6,676     $ 11,047  
                                 
Property and equipment, net at December 31, 2017   $ 2,287     $ 918     $ 4,409     $ 7,614