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Mineral Property (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Extractive Industries [Abstract]    
Interest income from SiverStream Note $ 5 $ 2
Mineral property revenue - Royalty Sale 0 408
Fair value of cash received on date of sale 0 185
Fair value of note received for royalty sale less carrying value 0 $ 263
Lik asset retirement obligation $ 125