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8. Long - Term Debt (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Total debt $ 871,082us-gaap_DebtInstrumentCarryingAmount $ 874,606us-gaap_DebtInstrumentCarryingAmount
Less current portion (248,059)us-gaap_ConvertibleNotesPayableCurrent (159,278)us-gaap_ConvertibleNotesPayableCurrent
Noncurrent portion 623,023us-gaap_ConvertibleLongTermNotesPayable 715,328us-gaap_ConvertibleLongTermNotesPayable
Wells fargo bank    
Total debt 9,081us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_WellsFargoBankMember
10,245us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_WellsFargoBankMember
Western States Equipmen tCo    
Total debt 6,032us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_WesternStatesEquipmentCoMember
11,977us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_WesternStatesEquipmentCoMember
BMT Leasing    
Total debt 6,841us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_BMTLeasingMember
9,254us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_BMTLeasingMember
Catepillar Finance    
Total debt 5,661us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_CatepillarFinanceMember
8,051us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_CatepillarFinanceMember
De Lage Landen Financial Services    
Total debt 6,403us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_DeLageLandenFinancialServicesMember
7,951us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_DeLageLandenFinancialServicesMember
De Lage Landen Financial Services 1    
Total debt    689us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_DeLageLandenFinancialServices1Member
Phyllis Rice    
Total debt 18,146us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_PhyllisRiceMember
18,146us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_PhyllisRiceMember
Soyatal Mine    
Total debt $ 818,918us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_SoyatalMineMember
$ 808,293us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= UAMY_SoyatalMineMember