3. Inventories (Details) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Inventories	$ 911,023	$ 855,637
Antimony Oxide - Finished
Inventories	252,553	326,126
Antimony Metal [Member]
Inventories	235,741	112,300
Antimony Concentrates
Inventories	28,317	30,815
Antimony Ore [Member]
Inventories	172,347	181,815
Antimony [Member]
Inventories	688,958	651,056
Zeolite [Member]
Inventories	$ 222,065	$ 204,581