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16. Business Segments (Details 2) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Capital Expenditure | $ 665,370 | $ 3,664,268
United States Antimony [Member] |  |
Capital Expenditure | 36,028 | 33,028
Mexico Antimony [Member] |  |
Capital Expenditure | 496,046 | 3,435,002
Subtotal Antimony [Member] |  |
Capital Expenditure | 532,074 | 3,468,030
Zeolite (Member) |  |
Capital Expenditure | $ 133,296 | $ 196,238

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- Definition Custom Element. + References No definition available. + Details
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Namespace Prefix: | UAMY_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=UAMY_UnitedStatesAntimonyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=UAMY_MexicoAntimonyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |