Note 4 - Property and Equipment (Details)	9 Months Ended
	Sep. 30, 2015
Minimum [Member] | Building and Building Improvements [Member]
Building and Building Improvements	5 years
Minimum [Member] | Mining Equipment [Member]
Building and Building Improvements	2 years
Minimum [Member] | Furniture and Fixtures [Member]
Building and Building Improvements	3 years
Minimum [Member] | Vehicles [Member]
Building and Building Improvements
Maximum [Member] | Building and Building Improvements [Member]
Building and Building Improvements	40 years
Maximum [Member] | Mining Equipment [Member]
Building and Building Improvements	7 years
Maximum [Member] | Furniture and Fixtures [Member]
Building and Building Improvements	7 years
Maximum [Member] | Vehicles [Member]
Building and Building Improvements
Building and Building Improvements [Member]
Building and Building Improvements
Mining Equipment [Member]
Building and Building Improvements
Furniture and Fixtures [Member]
Building and Building Improvements
Vehicles [Member]
Building and Building Improvements	5 years