3. Inventories (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Inventories	$ 806,441	$ 855,637
Antimony Oxide - Finished
Inventories	357,996	326,126
Antimony Metal [Member]
Inventories	37,397	112,300
Antimony Concentrates
Inventories	10,006	30,815
Antimony Ore [Member]
Inventories	154,973	181,815
Antimony [Member]
Inventories	560,372	651,056
Zeolite [Member]
Inventories	$ 246,069	$ 204,581