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Commitments and Contingencies Royalties (Details) (USD $)
1 Months Ended 3 Months Ended 13 Months Ended 12 Months Ended
Jul. 31, 2011
Jun. 30, 2011
Dec. 31, 2012
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
JEX [Member]
Jun. 30, 2012
Tetlin Lease [Member]
Jun. 30, 2014
Tetlin Lease [Member]
Jun. 30, 2014
Tetlin Lease [Member]
Minimum [Member]
Jul. 15, 2012
Tetlin Lease [Member]
Minimum [Member]
Jul. 31, 2011
Tetlin Lease [Member]
Minimum [Member]
May 31, 2011
Tetlin Lease [Member]
Minimum [Member]
Jul. 31, 2011
Tetlin Lease [Member]
Maximum [Member]
May 31, 2011
Tetlin Lease [Member]
Maximum [Member]
Jun. 30, 2014
Tetlin Lease [Member]
Scenario 1 [Member]
Jun. 30, 2014
Tetlin Lease [Member]
Scenario 2 [Member]
Jun. 30, 2014
Tetlin Lease [Member]
Scenario 3 [Member]
Jun. 30, 2014
Native Village of Tetlin Land [Member]
Nov. 29, 2010
Native Village of Tetlin Land [Member]
acre
Royalties [Line Items]                                      
Initial and Renewal Terms of Leases and Concessions on Undeveloped Acreage                                   10 years  
Payment by Lessee to Remove Acreage Renewal Restriction     $ 200,000                                
Percentage of Acreage Available for Renewal       50.00% 50.00%                            
Leasehold Interest Acreage                                     675,000
Contractual annual exploration costs               350,000                      
Royalty rate                     1.25% 2.00% 4.25% 5.00%          
Payment to Tetlin to reduce royalty rate 150,000 75,000         225,000                        
Decrease in royalty rates 0.50% 0.25%           0.75%                      
Increase in royalty rates                             0.25% 0.50% 0.75%    
Payment by Tetlin to increase royalty rate                             150,000 300,000 450,000    
Advance royalties                 $ 50,000 $ 75,000                  
Overriding royalty interest           2.00%