CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue:
Oxide plant lease	$ 1,944	$ 1,900	$ 5,852	$ 5,267
Total revenue	1,944	1,900	5,852	5,267
Costs and expenses:
Oxide plant lease costs	(594)	(657)	(1,804)	(1,685)
Exploration expense	(935)	(1,077)	(3,119)	(3,017)
El Quevar project expense	(582)	(364)	(1,584)	(917)
Velardena shutdown and care and maintenance costs	(422)	(428)	(1,391)	(1,409)
Administrative expense	(742)	(673)	(2,784)	(2,556)
Stock based compensation	(72)	139	(725)	(111)
Reclamation expense	(57)	(53)	(171)	(156)
Other operating income, net	45	3,188	225	4,638
Depreciation and amortization	(270)	(337)	(814)	(897)
Total costs and expenses	(3,629)	(262)	(12,167)	(6,110)
Income (loss) from operations	(1,685)	1,638	(6,315)	(843)
Other income and (expense):
Interest and other income (expense), net	(42)	(59)	(182)	54
Gain (loss) on foreign currency	(24)	7	(63)	(46)
Total other income (loss)	(66)	(52)	(245)	8
Income (loss) from operations before income taxes	(1,751)	1,586	(6,560)	(835)
Income taxes	(9)	(1)	(9)	(4)
Net income (loss)	$ (1,760)	$ 1,585	$ (6,569)	$ (839)
Net income (loss) per common share - basic
Income (loss) (in dollars per share)	$ (0.02)	$ 0.02	$ (0.07)	$ (0.01)
Net income (loss) per common share — diluted
Income (loss) (in dollars per share)	$ (0.02)	$ 0.02	$ (0.07)	$ (0.01)
Weighted average Common Stock outstanding - basic (in shares)	104,764,260	95,271,194	99,263,135	93,572,608
Weighted average Common Stock outstanding - diluted (in shares)	104,764,260	99,461,233	99,263,135	93,572,608