| | 2017 | | 2016 | | ||
| | US$(000) | | US$(000) | | ||
| | | | | | | |
Within one year | | | 1,543 | | | 1,543 | |
After one year but not more than five years | | | 6,173 | | | 6,173 | |
More than five years | | | 1,157 | | | 2,701 | |
| | | | | | | |
| | | 8,873 | | | 10,417 | |