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Commitments (Tables)
12 Months Ended
Dec. 31, 2019
Commitments [Abstract]  
Future minimum lease revenues receivable under non-cancellable operating leases

 

2019

2018

            Within one year

  -

2,991

            Total

-

2,991

 

Future minimum lease payments

 

2018

2017

Within one year

142

149

After one year but not more than five years 

567

596

More than five years

142

299

Total

851

1,044