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CASH, CASH EQUIVALENTS AND SHORT AND LONG TERM INVESTMENTS (Schedule of Significant Inputs for the Valuation Model used to Estimate Fair Value of Investments - UiTV Media Inc. or UiTV) (Details) (UiTV Media Inc. or UiTV [Member], Convertible Bond [Member], Equity Method [Member], USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
UiTV Media Inc. or UiTV [Member] | Convertible Bond [Member] | Equity Method [Member] |
Significant inputs for the valuation model used to estimate fair value of investments |
Total fair value of invested capital as at valuation date | $ 20,000 us-gaap_FairValueOfAssetsAcquired / invest_InvestmentIssuerAxis = utsi_UiTVMediaIncMember / us-gaap_InvestmentSecondaryCategorizationAxis = us-gaap_EquityMethodInvestmentsMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_ConvertibleDebtSecuritiesMember
Discount rate (as a percent) | 40.00%us-gaap_FairValueInputsDiscountRate / invest_InvestmentIssuerAxis = utsi_UiTVMediaIncMember / us-gaap_InvestmentSecondaryCategorizationAxis = us-gaap_EquityMethodInvestmentsMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_ConvertibleDebtSecuritiesMember

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- Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition The fair value of assets acquired in noncash investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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