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Intangible assets (Tables)
 12 Months Ended
Dec. 31, 2019
Intangible Assets Tables Abstract  
Schedule of intangible assets

    Internally generated – Completed    

Internally

generated –

In Process

     Acquired software licences     Total  
Cost                        
Balance at December 31, 2017     16,528       3,541       3,351       23,420  
Additions     -       7,730       5       7,735  
Transfers     10,373       (10,373 )     -       -  
Balance at December 31, 2018     26,901       898       3,356       31,155  
Additions     -       8,438       -       8,438  
Transfers     7,948       (7,948 )     -       -  
Balance at December 31, 2019     34,849       1,388       3,356       39,593  
Accumulated depreciation                                
Balance at December 31, 2017     5,491       -       3,032       8,523  
Amortization     3,883       -       91       3,974  
Balance at December 31, 2018     9,374       -       3,123       12,497  
Amortization     5,764       -       75       5,839  
Balance at December 31, 2019     15,138       -       3,198       18,336  
Net book value                                
At December 31, 2018     17,527       898       233       18,658  
At December 31, 2019     19,711       1,388       158       21,257