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3. Inventories (Details) - USD ($)
Jun. 30, 2015
Dec. 31, 2014
Inventories $ 2,316,266 $ 1,433,539
Antimony Oxide - Finished    
Inventories 584,385 718,982
Antimony Metal [Member]    
Inventories 404,476 40,352
Antimony Concentrates    
Inventories 538,646  
Antimony Ore [Member]    
Inventories 650,820 447,262
Antimony [Member]    
Inventories 2,178,327 1,240,141
Zeolite [Member]    
Inventories $ 137,939 $ 193,398