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Investment in Peak Gold, LLC (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended | 21 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Sep. 30, 2016 | Jan. 08, 2015 | Jun. 30, 2014
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Exploration expense of equity method investment | $ 3,012,330 | $ 2,960,055 |  |  |  | $ 12,544,189 |  |
General and Administrative Expense of Equity Method Investment | 440,363 | 354,254 |  |  |  | 2,242,762 |  |
Total Expenses of Equity Method Investment | 3,452,693 | 3,314,309 |  |  |  | 14,786,951 |  |
Equity Method Investment, Summarized Financial Information, Current Assets | 789,203 |  |  | $ 990,698 |  | 789,203 |  |
Equity Method Investment, Summarized Financial Information, Noncurrent Assets | 1,433,886 |  |  | 1,433,886 |  | 1,433,886 |  |
Suspended Losses | 12,400,000 |  |  |  |  |  |  |
Income (Loss) from Equity Method Investments | 0 | 0 | $ 5,600,000 | 0 | $ (1,433,886) | 13,800,000 |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures | 0 |  |  | 0 |  | 0 | $ 1,433,886 |
Investment by Joint Venture Partner | $ 2,700,000 |  |  |  |  | $ 13,400,000 |  |
Royal Alaska Joint Venture Percentage | 15.10% |  |  |  |  | 15.10% |  |
Contango Joint Venture Percentage | 0.00% |  |  |  |  | 0.00% | 100.00% |
Equity Method Investments | $ 0.0 |  |  | 0 | $ 0 | $ 0.0 |  | $ 0
Equity Method Investment, Summarized Financial Information, Assets | 2,223,089 |  |  | 2,424,584 |  | 2,223,089 |  |
Equity Method Investment, Summarized Financial Information, Current Liabilities | 2,226,154 |  |  | 1,674,956 |  | 2,226,154 |  |
Equity Method Investment, Summarized Financial Information, Liabilities |  |  |  | 1,674,956 |  |  |  |
Equity Method Investment Summarized Financial Information, Equity | (3,065) |  |  | 749,628 |  | (3,065) |  |
Equity Method Investment, Summarized Financial Information, Liabilities and Equity | 2,223,089 |  |  | $ 2,424,584 |  | 2,223,089 |  |
Equity Method Investment, Summarized Financial Information, Net Income (Loss) | $ 3,452,693 | $ 3,314,309 |  |  |  | $ 14,786,951 |  |
Contango's percentage of interest in Joint Venture Company | 85.00% | 100.00% | 100.00% |  |  | 85.00% |  |
Contango Ore Inc [Member] |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Equity Method Investment, Summarized Financial Information, Net Income (Loss) | $ 2,900,000 | $ 3,300,000 |  |  |  |  |  |

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