Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies

Schedule of non-cancellable operating lease commitments

	2015		2016		2017		2018		2019		Thereafter
El Quevar mining concessions (estimated)	$	110	$	110	$	110	$	110	$	110	$	—
Velardeña mining consessions (estimated)	$	12	$	12	$	12	$	12	$	12	$	—
Office space	$	270	$	242	$	248	$	255	$	239	$	—
Dedicated communications link	$	70	$	—	$	—	$	—	$	—	$	—
Purchase option agreement	$	550	$	—	$	—	$	—	$	—	$	—