Leasehold improvements | Plant and equipment | IT and office equipment | Total | |||||||||||||
(in thousands) | ||||||||||||||||
Cost: | ||||||||||||||||
At January 1, 2015 | $ | 1,313 | $ | 23,522 | $ | 4,300 | $ | 29,135 | ||||||||
Additions | — | 1,713 | 85 | 1,798 | ||||||||||||
Disposals | — | (4 | ) | (1 | ) | (5 | ) | |||||||||
Exchange difference | (14 | ) | (64 | ) | (19 | ) | (97 | ) | ||||||||
At December 31, 2015 | 1,299 | 25,167 | 4,365 | 30,831 | ||||||||||||
Additions | 34 | 2,549 | 78 | 2,661 | ||||||||||||
Disposals | — | (345 | ) | (643 | ) | (988 | ) | |||||||||
Exchange difference | (30 | ) | (221 | ) | (51 | ) | (302 | ) | ||||||||
At December 31, 2016 | 1,303 | 27,150 | 3,749 | 32,202 | ||||||||||||
Additions | 9 | 2,979 | 58 | 3,046 | ||||||||||||
Disposals | (87 | ) | (4,327 | ) | (81 | ) | (4,495 | ) | ||||||||
Exchange difference | 17 | 111 | 35 | 163 | ||||||||||||
At December 31, 2017 | $ | 1,242 | $ | 25,913 | $ | 3,761 | $ | 30,916 | ||||||||
Depreciation and impairment: | ||||||||||||||||
At January 1, 2015 | 375 | 16,103 | 3,914 | 20,392 | ||||||||||||
Depreciation charge for the year | 208 | 2,904 | 296 | 3,408 | ||||||||||||
Disposals | — | (1 | ) | (1 | ) | (2 | ) | |||||||||
Exchange difference | (5 | ) | (40 | ) | (38 | ) | (83 | ) | ||||||||
At December 31, 2015 | 578 | 18,966 | 4,171 | 23,715 | ||||||||||||
Depreciation charge for the year | 214 | 2,678 | 189 | 3,081 | ||||||||||||
Disposals | — | (346 | ) | (641 | ) | (987 | ) | |||||||||
Exchange difference | (9 | ) | (140 | ) | (117 | ) | (266 | ) | ||||||||
At December 31, 2016 | 783 | 21,158 | 3,602 | 25,543 | ||||||||||||
Depreciation charge for the year | 226 | 2,405 | 129 | 2,760 | ||||||||||||
Disposals | (87 | ) | (4,327 | ) | (81 | ) | (4,495 | ) | ||||||||
Reclassification | 275 | 326 | (601 | ) | — | |||||||||||
Exchange difference | 16 | 60 | 40 | 116 | ||||||||||||
At December 31, 2017 | $ | 1,213 | $ | 19,622 | $ | 3,089 | $ | 23,924 | ||||||||
At January 1, 2015 | $ | 938 | $ | 7,419 | $ | 386 | $ | 8,743 | ||||||||
At December 31, 2015 | 721 | 6,201 | 194 | 7,116 | ||||||||||||
At December 31, 2016 | 520 | 5,992 | 147 | 6,659 | ||||||||||||
At December 31, 2017 | $ | 29 | $ | 6,291 | $ | 672 | $ | 6,992 |