17. Business Segments (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Total assets	$ 13,693,975	$ 17,557,123
United States Antimony
Total assets	2,166,041	2,199,694
Mexico Antimony
Total assets	9,193,521	12,824,291
Subtotal Antimony
Total assets	11,359,562	15,023,985
Precious Metals
Total assets	567,738	615,719
Zeolite
Total assets	$ 1,766,675	$ 1,917,419