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Derivative Instruments (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Derivative instrument gain (loss) $ 20   $ (7)  
Kinross calls        
Derivative instrument gain (loss) $ 5 $ 0 $ (20) $ 0