XML 283 R145.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Share capital and reserves - Founder Preferred Shares Annual Dividend Amount and Warrant Redemption Amount (Details)
 12 Months Ended
Dec. 31, 2019
$ / shares
shares
Dec. 31, 2018
$ / shares
Jan. 02, 2018
shares
Dec. 31, 2017
Dec. 31, 2019
vote
$ / shares
shares
Dec. 31, 2018
$ / shares
shares
Dec. 31, 2017
$ / shares
shares
Dec. 31, 2017
€ / shares
shares
Dec. 31, 2016
$ / shares
Dec. 31, 2015
€ / shares
Mar. 22, 2019
shares
Disclosure of classes of share capital [line items]                      
Preferred Stock, Shares Issued1 1,500,000       1,500,000            
Number of votes per Founder Preferred Share | vote         1            
Preference shares, dividend payment terms, weighted average share price, minimum term required           10 days     10 days    
Preferred stock, conversion terms, weighted average share price (in dollars per share) | (per share)                 $ 11.5 € 11.50  
Percentage increase in dividend price 20.00%   20.00% 20.00% 20.00%            
Preference shares, conversion ratio                 1    
Dividends recognised as distributions to owners per share (in dollars per share) | (per share) $ 21.7289 $ 21.7289     $ 21.7289 $ 16.7538 $ 11.4824 € 16.6516   € 11.4824  
Ordinary shares                      
Disclosure of classes of share capital [line items]                      
Number of shares issued                     20,000,000
Founder preferred shares annual dividend amount     8,705,890     171,092 8,705,890 8,705,890      
Founder Entities [Member]                      
Disclosure of classes of share capital [line items]                      
Preferred Stock, Shares Issued1 750,000       750,000