Mineral Properties (Details) |
1 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
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Dec. 31, 2013
USD ($)
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Jun. 30, 2013
USD ($)
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Dec. 31, 2017
USD ($)
$ / lb
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Dec. 31, 2016
USD ($)
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Dec. 31, 2005
USD ($)
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| Write-off of equity investments (note 8) | $ 1,089,000 | ||||
| Long Term Calculated Sales Price Per Pound On Mines Useful Life | $ / lb | 31 | ||||
| Property impairments | $ 0 | ||||
| Other U.S. Properties [Member] | |||||
| Write-off of equity investments (note 8) | $ 62,000 | ||||
| Nfu Wyoming LLC | Lost Creek Property | |||||
| Percentage of asset acquired | 100.00% | ||||
| Aggregate consideration | $ 20,000,000 | ||||
| Nfu Wyoming LLC | Mining Claims In LC North LC East or LC West | |||||
| Royalty Revenue | $ 0 | ||||
| Pathfinder Mines Corporation | |||||
| Aggregate consideration | $ 6,700,000 | ||||
| Royalty (as a percent) | 5.00% | ||||
| Estimated asset reclamation obligation | $ 5,700,000 | ||||
| Deferred tax liabilities | 3,300,000 | ||||
| Mineral properties | $ 15,300,000 | ||||
| X | ||||||||||
- Definition Long Term Calculated Sales Price Per Pound On Mines Useful Life No definition available.
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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 charge against earnings in the period to reduce the carrying amount of real property to fair value. 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 Revenue earned during the period from the leasing or otherwise lending to a third party the entity's rights or title to certain property. Royalty revenue is derived from a percentage or stated amount of sales proceeds or revenue generated by the third party using the entity's property. Examples of property from which royalties may be derived include patents and oil and mineral rights. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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