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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

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