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Mineral Property (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Extractive Industries [Abstract]        
Interest income from SiverStream Note $ 2 $ 4 $ 3 $ 6
Mineral property revenue - Royalty Sale     408  
Fair value of cash received on date of sale     185  
Fair value of note received for royalty sale less carrying value     263  
Lik asset retirement obligation $ 125   $ 125