Nature of Business (Details)	Dec. 31, 2016 a
Mineral Properties [Line Items]
Area of mining claims	8,631
Daney Ranch
Mineral Properties [Line Items]
Area of land (in acres)	98
Area of water rights (in acres)	257
Private Lands
Mineral Properties [Line Items]
Area of mining claims	2,266
Bureau of Land Management Lands
Mineral Properties [Line Items]
Area of mining claims	6,365