Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2020

Commitments and Contingencies

Schedule of non-cancellable operating lease commitments

	2021		2022		2023		2024		2025		Thereafter
El Quevar mining concessions (estimated)	$	15	$	15	$	15	$	15	$	15	$	—
Velardeña mining concessions (estimated)	$	23	$	23	$	23	$	23	$	23	$	—
Velardeña ajido and surface rights (estimated)	$	46	$	46	$	46	$	46	$	46	$	—
Rodeo mining concessions (estimated)	$	34	$	34	$	34	$	34	$	34	$	—
Rodeo ajido and surface rights (estimated)	$	96	$	96	$	96	$	96	$	96	$	—
Office space	$	166	$	158	$	151	$	110	$	9	$	—