Amounts in US$ '000 | | 2017 | | 2016 | | 2015 | | |||
Staff costs (Note 11) | | | 24,713 | | | 19,451 | | | 18,215 | |
Share-based payment (Notes 11) | | | 3,117 | | | 1,847 | | | 6,881 | |
Consultant fees | | | 5,120 | | | 3,894 | | | 4,115 | |
Office expenses | | | 2,506 | | | 2,217 | | | 2,535 | |
Travel expenses | | | 2,772 | | | 1,717 | | | 1,497 | |
Director’s fees and allowance (Note 11) | | | 3,458 | | | 2,088 | | | 1,238 | |
Communication and IT costs | | | 2,109 | | | 2,013 | | | 1,791 | |
Allocation to joint operations | | | (7,646) | | | (4,365) | | | (4,203) | |
Other administrative expenses | | | 5,905 | | | 5,308 | | | 5,402 | |
| | | 42,054 | | | 34,170 | | | 37,471 | |