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Contract assets (Tables)
 12 Months Ended
Dec. 31, 2018
Text block [abstract]  
Summary of Contract Assets

Current contract assets:

 

     31 December
2018		      31 December
2017		  

Contract assets

      711,928        —    
  

 

 

     

 

 

  
     711,928        —    
  

 

 

     

 

 

  

Non-current contract assets:

 

     31 December
2018		      31 December
2017		  

Contract assets

      3,513        —    
  

 

 

     

 

 

  
     3,513        —