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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)
shares in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Costs, expenses and other:        
Exploration expense $ 442,000 $ 112,000 $ 826,000 $ 269,000
Depreciation 8,000 6,000 20,000 19,000
General and administrative 207,000 226,000 743,000 816,000
Property abandonment and impairment 17,000 0 17,000 0
Total costs, expenses and other 674,000 344,000 1,606,000 1,104,000
Other (loss) income        
Interest income (net) 13,000 3,000 23,000 111,000
Other income 0 0 10,000 44,000
Loss on derivative instruments (1,000) (70,000) (34,000) (90,000)
(Loss) gain on sale of marketable equity securities (89,000) 25,000 (70,000) 50,000
Unrealized (loss) gain on marketable equity securities 50,000 333,000 (220,000) 584,000
Total other (loss) income (27,000) 291,000 (291,000) 699,000
Net loss $ (701,000) $ (53,000) $ (1,897,000) $ (405,000)
Loss per common share:        
Basic and diluted $ (0.01) $ (0.00) $ (0.03) $ (0.01)
Weighted average shares outstanding:        
Basic and diluted 58,446 58,110 58,377 58,119