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Consolidated statements of loss and comprehensive loss - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Profit or loss [abstract] |  |
Revenue | $ 54,280 | $ 58,866
Cost of sales (Note 15) | (40,038) | (46,145)
Depletion and amortization (Note 8) | (6,709) | (7,388)
Care, maintenance and restructuring costs | (701) | (993)
Corporate general and administrative (Note 16) | (6,651) | (5,355)
Exploration costs | (2,726) | (1,681)
Accretion on decommissioning provision (Note 12) | (185) | (152)
Interest and financing expense | (723) | (2,337)
Foreign exchange gain (loss) | (225) | 340
Loss on disposal of assets (Note 8) |  | (20)
Loss on available-for-sale investment | (11) | (132)
Write-down of equipment (Note 8) | (204) |
Loss before income taxes | (3,893) | (4,997)
Income tax recovery (expense) (Note 17) | 427 | (210)
Net loss | (3,466) | (5,207)
Items that will not be reclassified to net loss |  |
Actuarial gain (loss) on post-employment benefit obligations | (394) | 1,607
Items that may be reclassified subsequently to net loss |  |
Foreign currency translation reserve | (170) | (1,334)
Change in fair value of available-for-sale securities | (237) | 237
Other comprehensive income (loss) | (801) | 510
Comprehensive loss | $ (4,267) | $ (4,697)
Loss per share |  |
Basic and diluted | $ (0.09) | $ (0.15)
Weighted average number of common shares outstanding |  |
Basic and diluted (Note 14) | 40,194,660 | 34,526,435

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- Definition The amount of change in equity resulting from transactions and other events, other than those changes resulting from transactions with owners in their capacity as owners. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 1 -IssueDate 2017-01-01 -Paragraph 32 -Subparagraph a -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=1&date=2017-03-01&anchor=para_32_a_ii&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 1 -IssueDate 2017-01-01 -Paragraph 24 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=1&date=2017-03-01&anchor=para_24_b&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph B12 -Subparagraph b -Clause ix -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_B12_b_ix&doctype=Appendix&seq=2 -URIDate 2017-03-09 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 106 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_106_a&doctype=Standard -URIDate 2017-03-09 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph B10 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_B10_b&doctype=Appendix&seq=2 -URIDate 2017-03-09 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 81A -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_81A_c&doctype=Standard -URIDate 2017-03-09 + Details
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