Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segment	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Information
Number of reportable segments | segment			2
Revenue	$ 1,224	$ 1,976	$ 2,420	$ 3,908
Mineral Extraction Processing and Marketing Costs	420	613	984	1,210
Depreciation, depletion and amortization	265	270	544	544
Exploration, El Quevar, Velardena and Administrative Expense	2,028	3,436	5,533	6,196
Pre-Tax (Income)/Loss	2,323	2,458	5,659	4,809
Total Assets	11,413	11,134	11,413	11,134	$ 13,357
Capital Expenditures	1	2	$ 2	27
Velardena properties
Segment Information
Number of reportable segments | segment			1
Revenue	1,224	1,976	$ 2,420	3,908
Mineral Extraction Processing and Marketing Costs	420	613	984	1,210
Depreciation, depletion and amortization	196	189	400	391
Exploration, El Quevar, Velardena and Administrative Expense	324	848	981	1,482
Pre-Tax (Income)/Loss	(232)	(362)	139	(678)
Total Assets	4,267	4,744	4,267	4,744
Capital Expenditures		1	1	1
Corporate, Exploration & Other
Segment Information
Depreciation, depletion and amortization	69	81	144	153
Exploration, El Quevar, Velardena and Administrative Expense	1,704	2,588	4,552	4,714
Pre-Tax (Income)/Loss	2,555	2,820	5,520	5,487
Total Assets	7,146	6,390	7,146	6,390
Capital Expenditures	$ 1	$ 1	$ 1	$ 26