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WARRANTY OBLIGATIONS AND OTHER GUARANTEES (Summary of the Activity Related to Warranty Obligations) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
WARRANTY OBLIGATIONS AND OTHER GUARANTEES [Abstract] |  |  |
Standard product warranty term, minimum | 1 year |  |
Standard product warranty term, maximum | 2 years |  |
Limited warranty services term, minimum | 2 years |  |
Activity related to warranty obligations |  |  |
Balance at the beginning of the period | $ 617 us-gaap_StandardProductWarrantyAccrual | $ 1,329 us-gaap_StandardProductWarrantyAccrual | $ 4,660 us-gaap_StandardProductWarrantyAccrual
Accruals for warranties issued during the period (benefit from expirations), net | (250)utsi_StandardProductWarrantyAccrualWarrantiesIssuedAndBenefitFromExpirationsNet | (473)utsi_StandardProductWarrantyAccrualWarrantiesIssuedAndBenefitFromExpirationsNet | 2,039 utsi_StandardProductWarrantyAccrualWarrantiesIssuedAndBenefitFromExpirationsNet
Warranty reserve derecognized upon IPTV divestiture |  |  | (2,507)utsi_StandardProductWarrantyAccrualWarrantiesReversed
Settlements made during the period | (150)us-gaap_StandardProductWarrantyAccrualPayments | (239)us-gaap_StandardProductWarrantyAccrualPayments | (2,863)us-gaap_StandardProductWarrantyAccrualPayments
Balance at the end of the period | $ 217 us-gaap_StandardProductWarrantyAccrual | $ 617 us-gaap_StandardProductWarrantyAccrual | $ 1,329 us-gaap_StandardProductWarrantyAccrual

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- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(1),(c)(5) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Represents the aggregate decrease in the liability for payments made (in cash or in kind) to satisfy claims under the terms of the standard product warranty. Does not include any Increase or Decrease in the liability for payments related to extended product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(2)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Represents the minimum term of limited warranty services provided by the entity. + References No definition available. + Details
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- Definition Represents the increase (decrease) in the liability for accruals related to standard product warranties issued during the period (benefit from expirations), net. + References No definition available. + Details
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- Definition Represents the aggregate decrease in the liability due to derecognition of warranty reserve. + References No definition available. + Details
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- Definition Represents the maximum term of standard warranties from the time of final acceptance. + References No definition available. + Details
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