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

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