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11. Business Segments (Details 1) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Capital Expenditure	$ 472,626	$ 848,495
United States Antimony [Member]
Capital Expenditure	49,782	44,768
Mexico Antimony [Member]
Capital Expenditure	389,053	762,840
Subtotal Antimony [Member]
Capital Expenditure	438,835	807,608
Zeolite [Member]
Capital Expenditure	$ 33,791	$ 40,887

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- Definition

Custom Element.

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No definition available.

+ Details

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