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3. Inventories (Tables)
6 Months Ended
Jun. 30, 2016
Inventory Disclosure [Abstract]  
Inventories
   

June 30,

2016

   

December 31,

2015

 
Antimony Metal   $ 182,839     $ 102,207  
Antimony Oxide     235,514       332,068  
Antimony Concentrates     169,721       133,954  
Antimony Ore     160,792       319,631  
     Total antimony     748,866       887,860  
Zeolite     156,836       206,378  
    $ 905,702     $ 1,094,238