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5. Inventories (Details) - USD ($) | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | ---
Inventories | $ 1,094,238 | $ 1,433,539 |
Antimony Metal [Member] |  |  |
Inventories | 102,207 | 40,352 |
Antimony Oxide [Member] |  |  |
Inventories | 332,068 | 718,982 |
Antimony Concentrates |  |  |
Inventories | 133,954 |  | $ 33,545
Antimony Ore [Member] |  |  |
Inventories | 319,631 | 447,262 |
Antimony [Member] |  |  |
Inventories | 887,860 | 1,240,141 |
Zeloite (Member) |  |  |
Inventories | $ 206,378 | $ 193,398 |

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