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Marketable Equity Securities (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]        
Unrealized gain (loss) on marketable equity securities $ 333 $ (347) $ 584 $ 736
Sale of Vendetta Mining Corp., shares 900,000 0 2,900,000 0
Sale of Vendetta Mining Corp., amount $ 47 $ 0 $ 123 $ 0
Gain on derivative instruments $ 25   $ 50