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5. Inventories (Tables)
12 Months Ended
Dec. 31, 2015
Inventory Disclosure [Abstract]  
Inventories
    2015     2014  
Antimony Metal   $ 102,207     $ 40,352  
Antimony Oxide     332,068       718,982  
Antimony Concentrates     133,954       33,545  
Antimony Ore     319,631       447,262  
     Total antimony     887,860       1,240,141  
Zeolite     206,378       193,398  
    $ 1,094,238     $ 1,433,539