Cost | Accumulated impairment loss | Carrying amount | |||||||
$ | $ | $ | |||||||
At January 1, 2016 | 7,836 | — | 7,836 | ||||||
Impact of foreign exchange rate changes | (283 | ) | — | (283 | ) | ||||
At December 31, 2016 | 7,553 | — | 7,553 | ||||||
Impact of foreign exchange rate changes | 1,060 | — | 1,060 | ||||||
At December 31, 2017 | 8,613 | — | 8,613 |