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5. Inventories (Tables)
12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
Inventories
    2017     2016  
Antimony Metal   $ -     $ 112,300  
Antimony Oxide     408,217       326,126  
Antimony Concentrates     35,554       30,815  
Antimony Ore     187,133       181,815  
  Total antimony     630,904       651,056  
Zeolite     283,805       204,581  
    $ 914,709     $ 855,637