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Supplemental Cash Flow Information and Material Non-Cash Transactions (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Jul. 31, 2012
Dec. 31, 2013
oz
Dec. 31, 2011
Dec. 31, 2012
Apr. 30, 2011
Apr. 30, 2011
Midas Gold Corp [Member]
Jul. 31, 2012
Compensation Warrants [Member]
Dec. 31, 2013
2013 Facility [Member]
Number of shares issued in transaction, (Shares)     30,402,615     30,402,615   612,180
Percentage of ownership under purchase agreement   100.00%            
Royalty percentage on first tier volume production   2.00%            
Gold production volume, first tier for royalty calculation   1,250,000            
Royalty percentage on second tier volume production   2.50%            
Gold production volume, second tier for royalty calculation   1,250,000            
Warrants issued (Note 9) (in shares)       4,757,941     166,667  
Fair value of shares received     $ 78,872   $ 78,872      
Compensation Options Issued to Underwriters 166,667   450,000