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SCHEDULE I CONDENSED FINANCIAL INFORMATION OF REGISTRANT (RESULTS OF OPERATIONS ) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cost of sales
Gross profit	$ 22,128us-gaap_GrossProfit	$ 40,220us-gaap_GrossProfit	$ 68,158us-gaap_GrossProfit
Operating expenses:
Selling, general and administrative	24,515us-gaap_SellingGeneralAndAdministrativeExpense	37,626us-gaap_SellingGeneralAndAdministrativeExpense	52,457us-gaap_SellingGeneralAndAdministrativeExpense
Research and development	11,686us-gaap_ResearchAndDevelopmentExpense	14,520us-gaap_ResearchAndDevelopmentExpense	28,131us-gaap_ResearchAndDevelopmentExpense
Amortization of intangible assets			516us-gaap_AmortizationOfIntangibleAssets
Restructuring charges			358us-gaap_RestructuringCharges
Total operating expenses	36,201us-gaap_OperatingExpenses	53,453us-gaap_OperatingExpenses	97,701us-gaap_OperatingExpenses
Operating loss	(14,073)us-gaap_OperatingIncomeLoss	(13,233)us-gaap_OperatingIncomeLoss	(29,543)us-gaap_OperatingIncomeLoss
Interest income	589us-gaap_InvestmentIncomeInterest	511us-gaap_InvestmentIncomeInterest	2,612us-gaap_InvestmentIncomeInterest
Interest expense	(88)us-gaap_InterestExpense	(151)us-gaap_InterestExpense	(240)us-gaap_InterestExpense
Other income, net	(2,249)us-gaap_OtherNonoperatingIncomeExpense	11,480us-gaap_OtherNonoperatingIncomeExpense	(2,973)us-gaap_OtherNonoperatingIncomeExpense
Income (loss) before income taxes	(28,646)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	(20,379)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	(33,187)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Equity in net loss of affiliated companies	(8,878)us-gaap_IncomeLossFromEquityMethodInvestments	(9,586)us-gaap_IncomeLossFromEquityMethodInvestments
Income tax benefit (expense)	1,618us-gaap_IncomeTaxExpenseBenefit	2,351us-gaap_IncomeTaxExpenseBenefit	2,392us-gaap_IncomeTaxExpenseBenefit
Net loss attributable to UTStarcom Holdings Corp.	(30,264)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	(22,721)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	(34,385)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
UTSTARCOM HOLDINGS CORP [Member]
Net sales
Unrelated parties
Related parties
Intercompany
Cost of sales
Unrelated parties
Related parties
Intercompany
Gross profit
Operating expenses:
Selling, general and administrative	1,398us-gaap_SellingGeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	2,377us-gaap_SellingGeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	2,315us-gaap_SellingGeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Research and development
Amortization of intangible assets
Restructuring charges
Impairment of long-lived assets
Total operating expenses	1,398us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	2,377us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	2,315us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Operating loss	(1,398)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(2,377)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(2,315)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Interest income
Interest expense
Other income, net
Income (loss) before income taxes	(1,398)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(2,377)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(2,315)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Equity in net loss of affiliated companies	(28,866)us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(20,344)us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(32,070)us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Income tax benefit (expense)
Net loss attributable to UTStarcom Holdings Corp.	$ (30,264)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	$ (22,721)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	$ (34,385)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_ParentCompanyMember

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