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5. Inventories (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Inventories $ 1,433,539us-gaap_InventoryGross $ 1,034,770us-gaap_InventoryGross  
Antimony Metal [Member]      
Inventories 40,352us-gaap_InventoryGross
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= UAMY_AntimonyMetalMember		 33,850us-gaap_InventoryGross
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= UAMY_AntimonyMetalMember		  
Antimony Oxide [Member]      
Inventories 718,982us-gaap_InventoryGross
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= UAMY_AntimonyOxideMember		 535,251us-gaap_InventoryGross
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= UAMY_AntimonyOxideMember		  
Antimony Concentrates      
Inventories 33,545us-gaap_InventoryGross
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= UAMY_AntimonyConcentratesMember		   93,190us-gaap_InventoryGross
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= UAMY_AntimonyConcentratesMember
Antimony Ore [Member]      
Inventories 447,262us-gaap_InventoryGross
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= UAMY_AntimonyOreMember		 106,519us-gaap_InventoryGross
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= UAMY_AntimonyOreMember		  
Antimony [Member]      
Inventories 1,240,141us-gaap_InventoryGross
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= UAMY_AntimonyMember		 768,810us-gaap_InventoryGross
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= UAMY_AntimonyMember		  
Zeloite (Member)      
Inventories $ 193,398us-gaap_InventoryGross
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= UAMY_ZeoliteMember		 $ 265,960us-gaap_InventoryGross
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= UAMY_ZeoliteMember