Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2019

Commitments and Contingencies

Schedule of non-cancellable operating lease commitments

	2020		2021		2022		2023		2024		Thereafter
El Quevar mining concessions (estimated)	$	30	$	30	$	30	$	30	$	30	$	—
Velardeña mining concessions (estimated)	$	23	$	23	$	23	$	23	$	23	$	—
Office space	$	161	$	166	$	158	$	151	$	110	$	9