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Related Party Transactions (Details) (USD $) | 3 Months Ended | 9 Months Ended | 41 Months Ended | 0 Months Ended |  | 0 Months Ended | 1 Months Ended | 0 Months Ended | 1 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2013 | Nov. 29, 2010 Contango [Member] | Nov. 29, 2010 Contango Ore Inc [Member] | Mar. 31, 2013 JEX [Member] | Mar. 31, 2013 ALASKA JEX [Member] | Mar. 26, 2012 Private Placement [Member] | Mar. 22, 2013 Private Placement [Member] | Mar. 26, 2012 Private Placement [Member] Board of Directors Chairman [Member] | Mar. 22, 2013 Private Placement [Member] Board of Directors Chairman [Member]
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Amount paid to acquire ownership interest in mining properties |  |  | $ 200,000 | $ 0 | $ 1,208,886 |  |  |  |  |  |  |  |
Overriding royalty interest |  |  |  |  |  |  |  | 3.00% | 2.00% |  |  |  |
Exploration expenses | 246,732 | 37,558 | 4,445,981 | 1,736,695 | 11,096,715 |  |  |  |  |  |  |  |
Parent contribution |  |  |  |  |  | 3,500,000 |  |  |  |  |  |  |
Dividend In Kind Ratio |  |  |  |  |  | 10.0 | 1.0 |  |  |  |  |  |
Shares sold in private placement |  |  |  |  |  |  |  |  |  | 882,500 | 1,230,999 | 400,000 | 83,333
Private placement, per share price |  |  |  |  |  |  |  |  |  | $ 10.00 | $ 12.00 |  |
Proceeds from private placement |  |  |  |  |  |  |  |  |  | $ 8,800,000 | $ 14,100,000 |  |

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- Definition Exploration expenses (including prospecting) related to the mining industry would be included in operating expenses. Exploration costs include costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of mineral reserves. + References No definition available. + Details
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