Note 3 - Basis of Reporting and Significant Accounting Policies (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2018

Dec. 31, 2017

Notes Tables

Property, Plant and Equipment [Table Text Block]

	Estimated
	Useful Life (years)
Building and Building Improvements		5	–	40
Mining equipment		2	–	7
Office and shop furniture and equipment		3	–	7
Vehicles			5

	Estimated
	Useful Life (years)
Building and Building Improvements	5	–	40
Mining equipment	2	–	7
Office and shop furniture and equipment	3	–	7
Vehicles		5