Mineral Properties (Details) - USD ($) $ in Thousands |
1 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|
Dec. 31, 2013 |
Jun. 30, 2013 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2005 |
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| Revenue, Net, Total | $ 23,496 | $ 38,368 | $ 27,305 | |||
| Write-off of equity investments (note 8) | $ 1,089 | |||||
| Other U.S. Properties [Member] | ||||||
| Write-off of equity investments (note 8) | $ 62 | |||||
| Nfu Wyoming LLC | Lost Creek Project | ||||||
| Percentage of asset acquired | 100.00% | |||||
| Aggregate consideration | $ 20,000 | |||||
| Nfu Wyoming LLC | Mining Claims In LC North LC East or LC West | ||||||
| Revenue, Net, Total | $ 0 | |||||
| Pathfinder Mines Corporation | ||||||
| Aggregate consideration | $ 6,700 | |||||
| Royalty (as a percent) | 5.00% | |||||
| Estimated asset reclamation obligation | $ 5,700 | |||||
| Deferred tax liabilities | 3,300 | |||||
| Mineral properties | $ 15,300 | |||||
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- Definition This element represents that Mineral Properties Acquired Percentage. No definition available.
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- Definition Represents the percentage of royalty exists with respect to future production of uranium on mining claims. No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary difference assumed at the acquisition date that are classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of property, plant, and equipment recognized as of the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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