13. Business Segments (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Properties, plants and equipment, net	$ 14,854,626	$ 15,132,897
Total Assets	16,745,467	17,131,254
United States Antimony [Member]
Properties, plants and equipment, net	1,661,616	1,687,997
Total Assets	2,317,937	2,510,323
Mexico Antimony [Member]
Properties, plants and equipment, net	11,266,118	11,452,507
Total Assets	11,950,342	12,073,219
Subtotal Antimony [Member]
Properties, plants and equipment, net	12,927,734	13,140,504
Total Assets	14,268,279	14,583,542
Precious Metals [Member]
Properties, plants and equipment, net	649,741	642,774
Total Assets	649,741	642,774
Zeolite [Member]
Properties, plants and equipment, net	1,277,151	1,349,619
Total Assets	$ 1,827,447	$ 1,904,938