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Note 5 - Property Option Agreement (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2018
Sep. 30, 2015
Details        
Share issuance on equity method investment       2,000,000
Cash payment on equity method investment       $ 300,000
Payments to Acquire Equity Method Investments       $ 1,500,000
Stock Issued During Period, Shares, Other 1,000,000      
Stock Issued During Period, Value, Other $ 480,000      
Abandonment of mineral rights   $ 3,231,700 $ 3,231,700