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13. Business Segments (Details 1) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Capital Expenditure	$ 683,568	$ 466,523	$ 1,334,886	$ 2,070,387
United States Antimony [Member]
Capital Expenditure	3,166	4,883	77,059	79,630
Mexico Antimony [Member]
Capital Expenditure	647,222	411,089	1,174,225	1,834,194
Subtotal Antimony [Member]
Capital Expenditure	650,388	415,972	1,251,284	1,913,824
Zeolite [Member]
Capital Expenditure	$ 33,180	$ 50,551	$ 83,602	$ 156,563

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