|
Mineral Properties (Details Textual) (USD $)
|
1 Months Ended | 12 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2013
|
Apr. 30, 2013
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2013
Asset Retirement Obligation [Member]
|
Dec. 31, 2013
Pathfinder Mines Corporation [Member]
|
Apr. 30, 2013
Lost Creek Property [Member]
|
Dec. 31, 2013
Lost Creek Property [Member]
|
Jun. 30, 2013
Other Us Properties [Member]
|
Dec. 31, 2013
Other Us Properties [Member]
|
Dec. 31, 2013
Nfu Wyoming Llc [Member]
Lost Creek Property [Member]
|
|
| Percentage of asset acquired | 100.00% | |||||||||||
| Purchased property interest | $ 20,000,000 | |||||||||||
| Write-off of mineral properties | 1,430,000 | 0 | 0 | 0 | 261,000 | 1,430,000 | ||||||
| Payments to Acquire Businesses, Gross | 6,700,000 | |||||||||||
| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | 5,700,000 | |||||||||||
| Royalty On Future Production Percentage | 1.67% | |||||||||||
| Number Of Mining Claims | 20 | |||||||||||
| Stock Issued During Period Value Issued For Royalty Interest | $ 763,000 | $ 763,000 | $ 763,000 | |||||||||
| Percentage Of Production Royalty On Acquisition | 5.00% | |||||||||||