13. Business Segments (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Properties, plants and equipment, net	$ 14,950,140	$ 15,132,897
Total Assets	16,750,574	17,131,254
United States Antimony [Member]
Properties, plants and equipment, net	1,674,787	1,687,997
Total Assets	2,225,360	2,510,323
Mexico Antimony [Member]
Properties, plants and equipment, net	11,343,589	11,452,507
Total Assets	12,009,001	12,073,219
Subtotal Antimony [Member]
Properties, plants and equipment, net	13,018,376	13,140,504
Total Assets	14,234,361	14,583,542
Precious Metals [Member]
Properties, plants and equipment, net	616,233	642,774
Total Assets	616,233	642,774
Zeolite [Member]
Properties, plants and equipment, net	1,315,531	1,349,619
Total Assets	$ 1,899,980	$ 1,904,938