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Consolidated Statements of Operations and Comprehensive Loss - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Statement [Abstract] |  |  |
Revenue (Note 17) | $ 54,552,000 | $ 61,351,000 | $ 46,253,000
Costs and expenses applicable to revenue | 35,453,000 | 37,617,000 | 29,907,000
Impairment of inventories (Note 7) | 5,362,000 | 0 | 0
Development, permitting and land holding | 21,118,000 | 8,762,000 | 1,488,000
Standby costs | 10,234,000 | 10,765,000 | 5,140,000
Abandonment of mineral properties | 1,036,000 | 2,770,000 | 0
Accretion of asset retirement obligation | 906,000 | 494,000 | 412,000
Selling costs | 379,000 | 316,000 | 279,000
Intangible asset amortization | 3,319,000 | 5,364,000 | 3,893,000
General and administration | 15,519,000 | 12,325,000 | 11,341,000
Costs directly attributable to acquisitions (Note 5) | 0 | 6,886,000 | 0
Impairment of plant and equipment and mineral properties (Note 10) | 0 | 8,224,000 | 80,071,000
Impairment of goodwill (Note 10) | 0 | 47,730,000 | 0
Total operating loss | (38,774,000) | (79,902,000) | (86,278,000)
Interest expense | (2,289,000) | (2,035,000) | (1,689,000)
Other income (expense) (Note 17) | 1,199,000 | (420,000) | 1,435,000
Income tax expense | 0 | 0 | (103,000)
Net loss | (39,864,000) | (82,357,000) | (86,635,000)
Items that may be reclassified in the future to profit and loss |  |  |
Foreign currency translation adjustment | (729,000) | 3,056,000 | 1,215,000
Unrealized (loss) gain on available-for-sale assets | 532,000 | (136,000) | (198,000)
Gains on available-for-sale financial assets reclassified to profit or loss | 0 | 0 | 188,000
Other comprehensive income (loss) | (197,000) | 2,920,000 | 1,205,000
Comprehensive loss | (40,061,000) | (79,437,000) | (85,430,000)
Net loss attributable to: |  |  |
Owners of the Company | (39,413,000) | (82,217,000) | (86,635,000)
Non-controlling interests | (451,000) | (140,000) | 0
Net loss | (39,864,000) | (82,357,000) | (86,635,000)
Comprehensive loss attributable to: |  |  |
Owners of the Company | (39,610,000) | (79,297,000) | (85,171,000)
Non-controlling interests | (451,000) | (140,000) | (259,000)
Comprehensive loss | $ (40,061,000) | $ (79,437,000) | $ (85,430,000)
Basic and diluted loss per share (Note 8) (in USD per share) | $ (0.70) | $ (2.46) | $ (4.41)

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- Definition Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e689-108580 + Details
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- Definition Other income (expense) included in net income that results in no cash inflows or outflows in the period. Includes noncash adjustments to reconcile net income (loss) to cash provided by (used in) operating activities that are not separately disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Expenses recognized in the period that are directly related to the selling and distribution of products or services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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