16. Business Segments (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Total assets	$ 13,299,502	$ 13,693,975
United States Antimony
Total assets	2,798,283	2,166,041
Mexico Antimony
Total assets	7,953,190	9,193,521
Subtotal Antimony
Total assets	10,751,473	11,359,562
United States Precious metals
Total assets	130,882	143,605
Mexico Precious metals
Total assets	803,003	424,133
Precious Metals
Total assets	933,885	567,738
Zeolite
Total assets	$ 1,614,144	$ 1,766,675