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11. Business Segments (Tables)
 3 Months Ended
Mar. 31, 2013
Segment Reporting [Abstract]  
Segment Information
   

As of March 31,

2013

    

As of December 31,

2012

  
Properties, plants and equipment, net:            
Antimony            
United States   $ 1,924,347     $ 1,889,859  
Mexico     7,245,800       6,969,622  
Subtotal Antimony     9,170,147       8,859,481  
Zeolite     1,696,966       1,716,925  
    $ 10,867,113     $ 10,576,406  
                 
Total Assets:                
Antimony                
United States   $ 3,700,537     $ 3,941,460  
Mexico     8,279,063       8,166,318  
Subtotal Antimony     11,979,600       12,107,778  
Zeolite     2,205,865       2,335,130  
    $ 14,185,465     $ 14,442,908  

 

    For the three Months Ended  
Capital expenditures:   March 31, 2013     March 31, 2012  
Antimony            
United States   $ 49,782     $ 44,768  
Mexico     389,053       762,840  
Subtotal Antimony     438,835       807,608  
Zeolite     33,791       40,887  
Total   $ 472,626     $ 848,495  
                 
Revenues:   March 31, 2013     March 31, 2012  
Antimony   $ 2,417,224     $ 2,354,947  
Zeolite     549,551       698,607  
    Total   $ 2,966,775     $ 3,053,554  
                 
Gross profit (loss):   March 31, 2013     March 31, 2012  
Antimony   $ (142,062 )   $ 113,008  
Zeolite     79,928       50,402  
Total   $ (62,134 )   $ 163,410  
                 
Depreciation, amortization and accretion                
of asset retirement obligation:   March 31, 2013     March 31, 2012  
Antimony   $ 130,178     $ 61,238  
Zeolite     53,750       49,817  
Total   $ 183,928     $ 111,055