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Mineral Properties (Details Textual) (USD $)
In Millions, unless otherwise specified |
3 Months Ended |
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Mar. 31, 2014
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| Percentage Of Production Royalty On Acquisition | 5.00% |
| Assumption Amount In Estimated Asset Reclamation Obligation | $ 5.7 |
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Allocated To Mineral Properties [Member]
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| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | 15.3 |
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Deferred Tax Liabilites [Member]
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| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | 3.3 |
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Asset Retirement Obligation [Member]
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| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | 5.7 |
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Pathfinder Mines Corporation [Member]
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| Payments to Acquire Businesses, Gross | 6.7 |
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Nfu Wyoming Llc [Member] | Lost Creek Property [Member]
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| Percentage of asset acquired | 100.00% |
| Purchased property interest | $ 20 |
| X | ||||||||||
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- Definition
The assumption amount in estimated asset reclamation obligation. No definition available.
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- Definition
This element represents that Mineral Properties Acquired Percentage. No definition available.
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- Definition
Percentage Of Production Royalty On Acquisition No definition available.
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- Definition
Amount of liabilities assumed at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying amount at the balance sheet date of mineral rights, or rights to extract a mineral from the earth or to receive payment in the form of a royalty for the extraction of minerals, net of amortization. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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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