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14. Income Taxes (Details 2) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Deferred tax asset:      
Other $ 0us-gaap_DeferredTaxAssetsOther $ 0us-gaap_DeferredTaxAssetsOther $ 11,151us-gaap_DeferredTaxAssetsOther
Foreign exploration costs 127,936UAMY_DeferredTaxAssetsForeignExplorationCosts 168,401UAMY_DeferredTaxAssetsForeignExplorationCosts 208,855UAMY_DeferredTaxAssetsForeignExplorationCosts
Foreign net operating loss carryforward 1,926,341us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign 232,723us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign 374,110us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign
Foreign other 0UAMY_DeferredTaxAssetsForeignOther 42,612UAMY_DeferredTaxAssetsForeignOther 217,887UAMY_DeferredTaxAssetsForeignOther
Federal and state net operating loss carry forward 337,890us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 35,424us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 39,824us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Deferred tax asset 2,392,167us-gaap_DeferredTaxAssetsGrossCurrent 479,160us-gaap_DeferredTaxAssetsGrossCurrent 851,827us-gaap_DeferredTaxAssetsGrossCurrent
Valuation allowance (foreign) (1,926,341)UAMY_DeferredTaxAssetsValuationAllowanceCurrentForeign (279,235)UAMY_DeferredTaxAssetsValuationAllowanceCurrentForeign (605,496)UAMY_DeferredTaxAssetsValuationAllowanceCurrentForeign
Valuation allowance (federal) (266,711)UAMY_DeferredTaxAssetsValuationAllowanceCurrentFederal (71,786)UAMY_DeferredTaxAssetsValuationAllowanceCurrentFederal 0UAMY_DeferredTaxAssetsValuationAllowanceCurrentFederal
Total deferred tax asset 199,115us-gaap_DeferredTaxAssetsNet 128,139us-gaap_DeferredTaxAssetsNet 246,331us-gaap_DeferredTaxAssetsNet
Deferred tax liability:      
Property, plant, and equipment (197,593)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment (128,139)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment (16,880)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Other (1,522)us-gaap_DeferredTaxLiabilitiesOther    
Total deferred tax liability (199,115)us-gaap_DeferredIncomeTaxLiabilities (128,139)us-gaap_DeferredIncomeTaxLiabilities (16,880)us-gaap_DeferredIncomeTaxLiabilities
Net Deferred Tax Asset $ 0us-gaap_DeferredTaxAssetsLiabilitiesNet $ 0us-gaap_DeferredTaxAssetsLiabilitiesNet $ 229,451us-gaap_DeferredTaxAssetsLiabilitiesNet