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Plant And Equipment (Details) $ in Thousands | 24 Months Ended |
--- | --- | ---
Dec. 31, 2016 USD ($) item | Dec. 31, 2015 USD ($)
Property, Plant and Equipment [Line Items] |  |
Cost | $ 12,501 | $ 12,537
Accumulated depreciation and write downs | 4,288 | 3,745
Net | 8,213 | 8,792
Mt Todd, Australia [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Cost | 5,654 | 5,617
Accumulated depreciation and write downs | 3,944 | 3,346
Net | 1,710 | 2,271
Guadalupe De Los Reyes, Mexico [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Cost | 14 | 17
Accumulated depreciation and write downs | 11 | 9
Net | 3 | 8
Corporate, United States [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Cost | 333 | 403
Accumulated depreciation and write downs | 333 | 390
Net |  | 13
Used mill equipment, Canada [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Cost | 6,500 | 6,500
Net | $ 6,500 | $ 6,500
Number of months to be considered held-for-sale | item | 12 |

X
- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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