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Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Costs, expenses and other:
Exploration expense	$ 180	$ 151
Depreciation and amortization	6	1
General and administrative	403	300
Total costs, expenses and other	589	452
Interest income (net)	26	46
Unrealized (loss) gain on marketable equity securities	(441)	128
Gain on derivative instruments		172
Total other (loss) income	$ (415)	346
Net loss		$ (106)
Basic and diluted	$ (0.02)	$ (0.00)
Weighted average shares outstanding:
Basic and diluted	58,444	38,692

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