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5. Inventories (Tables)
9 Months Ended
Sep. 30, 2020
Inventory Disclosure [Abstract]  
Inventories
   

September 30,

2020

   

December 31,

2019

 
Antimony Oxide   $ 47,981     $ 204,550  
Antimony Metal     28,807       5,654  
Antimony Ore     151,841       151,841  
     Total antimony     228,629       362,045  
Zeolite     336,421       264,199  
    $ 565,050     $ 626,244