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INCOME TAXES (Tax Credit - Narrative) (Details) (U.S. [Member], USD $) In Millions, unless otherwise specified | Dec. 31, 2014
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Tax credit carryforwards [Line Items] |
Valuation allowance against the related deferred tax assets | $ 87.7 us-gaap_TaxCreditCarryforwardValuationAllowance
Foreign [Member] | Tax credit subject To expiration [Member] |
Tax credit carryforwards [Line Items] |
Tax credit carryforwards | 74.5 us-gaap_TaxCreditCarryforwardAmount / utsi_AllCountriesAxis = country_US / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember / utsi_TaxCreditExpirationTypeAxis = utsi_TaxCreditSubjectToExpirationMember
Alternative minimum tax credit [Member] | Tax credit not subject to expiration [Member] |
Tax credit carryforwards [Line Items] |
Tax credit carryforwards | 1.0 us-gaap_TaxCreditCarryforwardAmount / utsi_AllCountriesAxis = country_US / us-gaap_TaxCreditCarryforwardAxis = utsi_AlternativeMinimumTaxCreditMember / utsi_TaxCreditExpirationTypeAxis = utsi_TaxCreditNotSubjectToExpirationMember
R&D credit [Member] |
Tax credit carryforwards [Line Items] |
Tax credit carryforwards | 12.1 us-gaap_TaxCreditCarryforwardAmount / utsi_AllCountriesAxis = country_US / us-gaap_TaxCreditCarryforwardAxis = us-gaap_ResearchMember
R&D credit [Member] | Tax credit subject To expiration [Member] |
Tax credit carryforwards [Line Items] |
Tax credit carryforwards | 8.3 us-gaap_TaxCreditCarryforwardAmount / utsi_AllCountriesAxis = country_US / us-gaap_TaxCreditCarryforwardAxis = us-gaap_ResearchMember / utsi_TaxCreditExpirationTypeAxis = utsi_TaxCreditSubjectToExpirationMember
R&D credit [Member] | Tax credit not subject to expiration [Member] |
Tax credit carryforwards [Line Items] |
Tax credit carryforwards | $ 3.8 us-gaap_TaxCreditCarryforwardAmount / utsi_AllCountriesAxis = country_US / us-gaap_TaxCreditCarryforwardAxis = us-gaap_ResearchMember / utsi_TaxCreditExpirationTypeAxis = utsi_TaxCreditNotSubjectToExpirationMember

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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 + Details
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- Definition Amount of valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from tax credit carryforwards for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Valuation Allowance -URI http://asc.fasb.org/extlink&oid=6528051 + Details
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