Years ended December 31, | |||||||||
2017 | 2016 | 2015 | |||||||
$ | $ | $ | |||||||
Changes in operating assets and liabilities: | |||||||||
Trade and other receivables | 158 | 228 | 270 | ||||||
Prepaid expenses and other current assets | (343 | ) | (45 | ) | (111 | ) | |||
Other non-current assets | 39 | (233 | ) | 58 | |||||
Payables and accrued liabilities | (1,113 | ) | (313 | ) | (1,013 | ) | |||
Deferred revenues | — | 555 | — | ||||||
Provision for restructuring costs (note 13) | (190 | ) | (566 | ) | (1,840 | ) | |||
Employee future benefits (note 18) | (551 | ) | (459 | ) | (507 | ) | |||
Provisions | (212 | ) | (231 | ) | (252 | ) | |||
(2,212 | ) | (1,064 | ) | (3,395 | ) |