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3. Summary of Significant Accounting Policies (Details Narrative) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Summary Of Significant Accounting Policies Details Narrative |  |  |
Capitalized plant in construction | $ 5,002,392 | $ 2,473,750 |
Capitalized interest | $ 14,313 | $ 10,888 |
Basic weighted average shares |  | 525,827 | 221,361

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Namespace Prefix: | UAMY_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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

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Namespace Prefix: | UAMY_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of shares of common stock subject to repurchase or cancellation determined by relating the portion of time within a reporting period that these shares have been outstanding to the total time in that period. Common stock subject to repurchase are outstanding common shares that are contingently returnable (that is, subject to recall). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2646-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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Period Type: | duration