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5. Inventories (Tables)
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Inventories
    2018     2017  
Antimony Metal   $ 8,127     $ -  
Antimony Oxide     255,782       408,217  
Antimony Concentrates     2,214       35,554  
Antimony Ore     257,067       187,133  
     Total antimony     523,190       630,904  
Zeolite     232,071       283,805  
    $ 755,261     $ 914,709