Segment Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) segment	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Segment Information
Number of reportable segments | segment	2
Revenue	$ 1,644	$ 1,463
Costs Applicable to Sales	537	474
Depreciation, depletion and amortization	188	550
Exploration, El Quevar, Velardena and Administrative Expense	2,058	2,744
Pre-tax (gain) loss	1,135	6,287
Total Assets	$ 13,254	14,031	$ 14,008
Velardena properties
Segment Information
Number of reportable segments | segment	1
Revenue	$ 1,644	1,463
Costs Applicable to Sales	537	474
Depreciation, depletion and amortization	91	420
Exploration, El Quevar, Velardena and Administrative Expense	357	810
Pre-tax (gain) loss	(774)	211
Total Assets	7,795	7,429
Corporate, Exploration & Other
Segment Information
Depreciation, depletion and amortization	97	130
Exploration, El Quevar, Velardena and Administrative Expense	1,701	1,934
Pre-tax (gain) loss	1,909	6,076
Total Assets	$ 5,459	$ 6,602