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3. Inventories (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Inventories	$ 2,307,164us-gaap_InventoryGross	$ 1,433,539us-gaap_InventoryGross
Antimony Oxide - Finished
Inventories	704,315us-gaap_InventoryGross / us-gaap_RangeAxis = UAMY_AntimonyOxideFinishedMember	718,982us-gaap_InventoryGross / us-gaap_RangeAxis = UAMY_AntimonyOxideFinishedMember
Antimony Metal [Member]
Inventories	86,032us-gaap_InventoryGross / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = UAMY_AntimonyMetalMember	40,352us-gaap_InventoryGross / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = UAMY_AntimonyMetalMember
Antimony Concentrates
Inventories	938,133us-gaap_InventoryGross / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = UAMY_AntimonyConcentratesMember	93,190us-gaap_InventoryGross / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = UAMY_AntimonyConcentratesMember
Antimony Ore [Member]
Inventories	486,242us-gaap_InventoryGross / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = UAMY_AntimonyOreMember	447,262us-gaap_InventoryGross / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = UAMY_AntimonyOreMember
Antimony [Member]
Inventories	2,214,722us-gaap_InventoryGross / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = UAMY_AntimonyMember	1,240,141us-gaap_InventoryGross / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = UAMY_AntimonyMember
Zeolite [Member]
Inventories	$ 92,442us-gaap_InventoryGross / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = UAMY_ZeoliteMember	$ 193,398us-gaap_InventoryGross / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = UAMY_ZeoliteMember

X

- Definition

Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- Details

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