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Mineral Property (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Extractive Industries [Abstract]        
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  
Interest income from SiverStream Note $ 0 $ 3 7 $ 9
Lik asset retirement obligation $ 125   $ 125