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2. Concentrations of Risk (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Sales to Three Largest Customers | $ 6,102,297 us-gaap_SalesRevenueGoodsNet | $ 7,136,360 us-gaap_SalesRevenueGoodsNet | $ 6,651,605 us-gaap_SalesRevenueGoodsNet
Total percentage of revenue | 56.65%us-gaap_ConcentrationRiskPercentage1 | 64.75%us-gaap_ConcentrationRiskPercentage1 | 55.23%us-gaap_ConcentrationRiskPercentage1
AlphaGaryCorporation [Member] |  |  |
Sales to Three Largest Customers | 3,289,766 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_AlphaGaryCorporationMember | 3,700,945 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_AlphaGaryCorporationMember | 3,245,612 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_AlphaGaryCorporationMember
East Penn Manufacturing Inc |  |  |
Sales to Three Largest Customers | 720,966 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_EastPennMember | 0 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_EastPennMember | 0 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_EastPennMember
General Electric [Member] |  |  |
Sales to Three Largest Customers | 0 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_GELightingLPCMember | 781,200 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_GELightingLPCMember | 0 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_GELightingLPCMember
KohlerCorporation [Member] |  |  |
Sales to Three Largest Customers | 2,091,565 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_KohlerCorporationMember | 2,654,215 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_KohlerCorporationMember | 2,286,938 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_KohlerCorporationMember
PolymerProductsInc [Member] |  |  |
Sales to Three Largest Customers | $ 0 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_PolymerProductsIncMember | $ 0 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_PolymerProductsIncMember | $ 1,119,055 us-gaap_SalesRevenueGoodsNet / us-gaap_MajorCustomersAxis = UAMY_PolymerProductsIncMember

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