XML 55 R54.htm IDEA: XBRL DOCUMENT v3.20.1
Significant accounting policies - IFRS 16 (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Jan. 01, 2019
IFRS 16 Financial Instruments    
Right-of-use assets $ 2.5  
Adjustment    
IFRS 16 Financial Instruments    
Right-of-use assets   $ 2.8