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14. Income Taxes (Details 3) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Disclosure [Abstract] |  |  |
Computed expected tax provision (benefit) | $ (558,409)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ (494,102)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ (137,000)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Foreign taxes | 62,508 us-gaap_IncomeTaxReconciliationTaxCreditsForeign | 78,768 us-gaap_IncomeTaxReconciliationTaxCreditsForeign | 34,641 us-gaap_IncomeTaxReconciliationTaxCreditsForeign
Other(1) | (1,346,130)us-gaap_IncomeTaxReconciliationOtherAdjustments | 899,260 us-gaap_IncomeTaxReconciliationOtherAdjustments | 61,770 us-gaap_IncomeTaxReconciliationOtherAdjustments
Change in valuation allowance U.S. | 194,925 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | (494,102)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 207,696 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Change in valuation allowance Foreign | 1,647,106 UAMY_ChangeInValuationAllowanceForeign | 78,768 UAMY_ChangeInValuationAllowanceForeign |
Release of valuation allowance foreign |  | 899,260 UAMY_ReleaseOfValuationAllowanceForeign | 0 UAMY_ReleaseOfValuationAllowanceForeign
Income tax (expense) | $ 0 us-gaap_IncomeTaxExpenseBenefit | $ 229,451 us-gaap_IncomeTaxExpenseBenefit | $ 167,107 us-gaap_IncomeTaxExpenseBenefit
Computed expected tax provision (benefit), Percent | (35.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | (35.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | (35.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Foreign taxes, Percent | 3.90%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign | 5.60%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign | 8.90%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign
Other(1), Percent | (84.40%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | 63.70%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | 15.80%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Changee in valuation allowance U.S., Percent | 12.20%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | 5.10%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | 53.10%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Change in valuation allowance Foreign | 103.20%UAMY_ChangeInValuationAllowanceForeignPercent |  |
Release of valuation allowance foreign, Percent |  | (23.10%)UAMY_ReleaseOfValuationAllowanceForeignPercent | 0.00%UAMY_ReleaseOfValuationAllowanceForeignPercent
Total, Percent | 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 16.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 42.70%us-gaap_EffectiveIncomeTaxRateContinuingOperations

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