CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Revenue:
Oxide plant lease		$ 1,932	$ 1,637
Total revenue		1,932	1,637
Costs and expenses:
Oxide plant lease costs		(597)	(503)
Exploration expense		(855)	(899)
El Quevar project expense		(315)	(272)
Velardena shutdown and care and maintenance costs		(517)	(489)
Administrative expense		(1,074)	(1,061)
Stock based compensation		(564)	(15)
Reclamation expense		(59)	(51)
Other operating income, net		108	1,226
Depreciation and amortization		(274)	(296)
Total costs and expenses		(4,147)	(2,360)
Income (loss) from operations		(2,215)	(723)
Other income and (expense):
Interest and other (expense) income, net		(98)	3
Loss on foreign currency		(38)	(15)
Total other income (loss)		(136)	(12)
Income (loss) from operations before income taxes		(2,351)	(735)
Net income (loss)		$ (2,351)	$ (735)
Net income (loss) per common share - basic
Loss (in dollars per share)		$ (0.02)	$ (0.01)
Weighted average common stock outstanding - basic (in shares)	[1]	95,755,304	91,726,375

[1] Potentially dilutive shares have not been included because to do so would be anti-dilutive.