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13. Business Segments (Details 1) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Capital Expenditure	$ 336,130	$ 1,161,894	$ 651,318	$ 1,634,520
United States Antimony [Member]
Capital Expenditure	15,352	15,404	73,893	65,186
Mexico Antimony [Member]
Capital Expenditure	299,414	1,074,269	527,003	1,463,322
Subtotal Antimony [Member]
Capital Expenditure	314,766	1,089,673	600,896	1,528,508
Zeolite [Member]
Capital Expenditure	$ 21,364	$ 72,221	$ 50,422	$ 106,012

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