Note 4 - Summary of Significant Accounting Policies (Details) - Property and Equipment	6 Months Ended
	Jun. 30, 2015
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful life	5 years
Minimum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful life	5 years
Minimum [Member] | Mining Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful life	2 years
Minimum [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful life	3 years
Maximum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful life	40 years
Maximum [Member] | Mining Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful life	7 years
Maximum [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful life	7 years