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14. Business Segments (Details) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Total assets $ 16,973,326 $ 17,557,123
United States Antimony    
Total assets 2,062,312 2,199,694
Mexico Antimony    
Total assets 12,412,737 12,824,292
Subtotal Antimony    
Total assets 14,475,049 15,023,986
Precious Metals    
Total assets 581,314 615,719
Zeolite    
Total assets $ 1,916,963 $ 1,917,418