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DIVESTITURES (Schedule of liabilities and assets related to un-assigned contracts) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Aug. 31, 2012
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Divestitures [Line Items] |  |  |  |
Deferred revenue | $ 11.7 us-gaap_DeferredRevenue | $ 10.2 us-gaap_DeferredRevenue | $ 9.8 us-gaap_DeferredRevenue |
Prepaid contract service costs to buyer | 5.7 us-gaap_DeferredCostsCurrentAndNoncurrent | 5.3 us-gaap_DeferredCostsCurrentAndNoncurrent | 6.1 us-gaap_DeferredCostsCurrentAndNoncurrent |
IPTV operations [Member] |  |  |  |
Divestitures [Line Items] |  |  |  |
Deferred revenue |  |  | 5.1 us-gaap_DeferredRevenue / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = utsi_IPTVOperationsMember | 10.0 us-gaap_DeferredRevenue / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = utsi_IPTVOperationsMember
Customer advances |  |  |  | 37.3 us-gaap_CustomerAdvancesAndDeposits / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = utsi_IPTVOperationsMember
Total liabilities associated with the unassigned IPTV contracts | 21.5 utsi_RevenueRecognitionLiabilityAndDeferredCostRelatedToUnassignedContracts / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = utsi_IPTVOperationsMember |  |  | 47.3 utsi_RevenueRecognitionLiabilityAndDeferredCostRelatedToUnassignedContracts / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = utsi_IPTVOperationsMember
Deferred contract costs |  |  |  | 24.6 utsi_DeferredContractCosts / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = utsi_IPTVOperationsMember
Prepaid contract service costs to buyer |  |  |  | 22.7 us-gaap_DeferredCostsCurrentAndNoncurrent / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = utsi_IPTVOperationsMember
Total assets associated with the un-assigned IPTV contracts |  |  |  | $ 47.3 utsi_RevenueRecognitionAssetsAndDeferredCostRelatedToUnassignedContracts / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = utsi_IPTVOperationsMember

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- Definition Refundable consideration, usually cash, held by the entity pending satisfactory completion of the entity's obligations or pending the closing of a contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15a) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 + Details
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- Details
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- Definition The carrying amount of deferred contract costs. + References No definition available. + Details
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- Definition Represents the amount of assets and deferred cost related to un-assigned contracts. + References No definition available. + Details
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- Definition Represents the amount of liability and deferred cost related to un-assigned contracts. + References No definition available. + Details
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