CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue:
Oxide plant lease	$ 1,224	$ 1,976	$ 2,420	$ 3,908
Total revenue	1,224	1,976	2,420	3,908
Costs and expenses:
Oxide plant lease costs	(420)	(613)	(984)	(1,210)
Exploration expense	(824)	(1,328)	(2,455)	(2,183)
El Quevar project expense	(245)	(686)	(493)	(1,001)
Velardeña care and maintenance costs	(192)	(452)	(655)	(969)
Administrative expense	(767)	(969)	(1,930)	(2,043)
Stock based compensation	(614)	(89)	(666)	(653)
Reclamation expense	(62)	(55)	(121)	(114)
Other operating (expense) income, net	(106)	71	(102)	179
Depreciation and amortization	(265)	(270)	(544)	(544)
Total costs and expenses	(3,495)	(4,391)	(7,950)	(8,538)
Loss from operations	(2,271)	(2,415)	(5,530)	(4,630)
Other expense:
Interest and other expense, net	(46)	(43)	(73)	(141)
Loss on foreign currency	(6)		(56)	(38)
Total other loss	(52)	(43)	(129)	(179)
Loss from operations before income taxes	(2,323)	(2,458)	(5,659)	(4,809)
Net loss	$ (2,323)	$ (2,458)	$ (5,659)	$ (4,809)
Net income (loss) per common share - basic
Loss (in dollars per share)	$ (0.02)	$ (0.03)	$ (0.05)	$ (0.05)
Weighted average Common Stock outstanding - basic (in shares)	124,134,135	97,144,467	115,690,717	96,466,982