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Commitments (Tables)
12 Months Ended
Dec. 31, 2017
Commitments [Abstract]  
Future minimum lease revenues receivable under non-cancellable operating leases

 

2017

2016

Within one year

1,548

1,086

Total

1,548

1,086

 

Future minimum lease payments

 

2017

2016

Within one year

149

131

After one year but not more than five years 

596

522

More than five years

299

392

Total

1,044

1,045