Inventories (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Material and supplies	$ 245,000	$ 330,000
Inventories	245,000	330,000
Metals inventory	0	0
Velardena properties
Metals inventory	0	0
In-process inventory	0	0
Inventory write down	$ 300,000	$ 300,000