XML 82 R37.htm IDEA: XBRL DOCUMENT v3.8.0.1
Cash and cash equivalents (Tables)
 3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Text block1 [abstract]    
Cash and cash equivalents

 

   March 31, 2018      December 31, 2017  

Short-term bank deposits

      20,694        66,767  

Short-term investment

      2,524,695        —    
  

 

 

     

 

 

  
     2,545,389        66,767  
  

 

 

     

 

 

  
     December 31,  
     2017      2016  

Short-term bank deposits

      66,767        79,969  
  

 

 

     

 

 

  
     66,767        79,969