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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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Overriding Royalty Interest

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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.

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The cash outflow from the purchase of mining and mining related assets during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 17

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 19

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 18

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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-Topic 230

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-Section 45

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