Administrative Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Administrative expenses	$ 7,262	$ 6,017
General and Administrative
Administrative expenses	4,183	3,466
Argentina Statutory Taxes
Administrative expenses	641	515
Professional Fees
Administrative expenses	1,566	862
Operating Leases
Administrative expenses	130	86
Directors' Remuneration
Administrative expenses	259	251
Gain on Sale of Property, Plant and Equipment
Administrative expenses	(83)	(42)
Depreciation of Property, Plant and Equipment
Administrative expenses	1,844	4,512
Depreciation Allocated to Inventory
Administrative expenses	(1,644)	(4,447)
Amortization of Mining Rights
Administrative expenses	100	100
Consulting Fees
Administrative expenses	18	26
Net Impairment of Assets
Administrative expenses	0	689
Transaction Taxes Expenses (Income)
Administrative expenses	$ 248	$ (1)