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3. Inventories (Tables)
 6 Months Ended
Jun. 30, 2017
Inventory Disclosure [Abstract]  
Inventories
    June 30,     December 31,  
    2017     2016  
Antimony Metal   $ 37,397     $ 112,300  
Antimony Oxide     357,996       326,126  
Antimony Concentrates     10,006       30,815  
Antimony Ore     154,973       181,815  
  Total antimony     560,372       651,056  
Zeolite     246,069       204,581  
    $ 806,441     $ 855,637