Segment Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) segment item	Dec. 31, 2018 USD ($)
Segment Information
Number of reportable segments | item	2
Revenue	$ 7,730	$ 7,217
Mineral Extraction Processing and Marketing Costs	2,377	2,289
Depreciation, depletion and amortization	1,098	1,171
Exploration, El Quevar, Velardena and Administrative Expense	11,531	10,419
Pre-Tax (Income)/Loss	5,351	1,932
Total Assets	13,357	12,644
Capital Expenditures	$ 38	152
Velardena properties
Segment Information
Number of reportable segments | segment	1
Revenue	$ 7,730	7,217
Mineral Extraction Processing and Marketing Costs	2,377	2,289
Depreciation, depletion and amortization	796	816
Exploration, El Quevar, Velardena and Administrative Expense	2,538	2,362
Pre-Tax (Income)/Loss	(4,301)	(1,320)
Total Assets	8,069	5,699
Capital Expenditures	11	79
Corporate, Exploration & Other
Segment Information
Depreciation, depletion and amortization	302	355
Exploration, El Quevar, Velardena and Administrative Expense	8,993	8,057
Pre-Tax (Income)/Loss	9,652	3,252
Total Assets	5,288	6,945
Capital Expenditures	$ 27	$ 73