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10. Business Segments (Details 1) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Capital Expenditure	$ 989,759	$ 717,782	$ 2,644,396	$ 2,074,447
United States Antimony [Member]
Capital Expenditure	96,206	16,501	158,644	95,790
Mexico Antimony [Member]
Capital Expenditure	786,086	579,525	2,220,913	1,668,761
Subtotal Antimony [Member]
Capital Expenditure	882,292	596,026	2,379,557	1,764,551
Zeolite [Member]
Capital Expenditure	$ 107,467	$ 121,756	$ 264,839	$ 309,896

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