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4. Accounts Receivable and Due to Factor (Details Narrative) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Accounts Receivable And Due To Factor Details Narrative      
Factoring Expense $ 49,364UAMY_FactoringExpense $ 71,772UAMY_FactoringExpense $ 78,100UAMY_FactoringExpense
Net accounts receivable factored during the year $ 2,300,000UAMY_NetAccountsReceivableFactoredDuringYear $ 3,280,000UAMY_NetAccountsReceivableFactoredDuringYear $ 3,800,000UAMY_NetAccountsReceivableFactoredDuringYear