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12. Business Segments (Details 2) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Depreciation and amortization	$ 135,682	$ 130,651	$ 503,017	$ 349,375
Capital Expenditure	466,523	989,759	2,070,387	2,644,396
United States Antimony [Member]
Capital Expenditure	4,883	96,206	79,630	158,644
Mexico Antimony [Member]
Capital Expenditure	411,089	786,086	1,834,194	2,220,913
Subtotal Antimony [Member]
Capital Expenditure	415,972	882,292	1,913,824	2,379,557
Antimony [Member]
Depreciation and amortization	80,600	75,574	339,250	192,020
Zeolite [Member]
Depreciation and amortization			163,767	157,355
Capital Expenditure			156,563	264,839
Zeloite (Member)
Depreciation and amortization	55,082	55,077
Capital Expenditure	$ 50,551	$ 107,467

X

- Definition

Custom Element.

+ References

No definition available.

+ Details

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

X

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	duration