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Note 3 - Summary of Significant Accounting Policies (Details Textual) - USD ($) |  | 9 Months Ended | 12 Months Ended | 15 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 22, 2017 | Mar. 31, 2019 | Jun. 30, 2018 | Mar. 31, 2019 | Apr. 26, 2018 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2014
Income Tax Expense (Benefit), Total |  | $ 0 | $ 0 |  |  |  |  |  |
Liability for Uncertainty in Income Taxes, Current |  | 0 | 0 | $ 0 |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 35.00% |  |  | 21.00% |  |  |  |  |
Equity Method Investments |  |  |  |  |  |  |  |  |
The Joint Venture Company [Member] |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 60.00% |  | 60.00% | 60.00% |  |  |  |
Equity Method Investments |  | $ 0 | 0 | $ 0 |  | $ 0 | $ 0 | $ 0 | $ 0
The Joint Venture Company [Member] | Peak Gold, LLC [Member] |  |  |  |  |  |  |  |  |
Equity Method Investments |  | $ 0 | $ 0 | $ 0 |  |  |  |  |

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