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401(K) PLAN (Details) (USD $) | 0 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 01, 2000 | Dec. 31, 2013 item | Dec. 31, 2012 item | Dec. 31, 2010
401(K) PLAN |  |  |  |
Minimum age of the company's eligible employee | 21 years |  |  |
Maximum amount per employee contributed by the entity for the plan year 2010 |  |  |  | $ 3,252
Period over which the entity's matching contribution vests |  | 5 years |  |
Number of additional plans adopted |  | 0 | 0 |

X
- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the period over which the entity's matching contribution to the defined contribution plan vests based upon the longevity of the employee's service with the entity. + References No definition available. + Details
Name: | utsi_DefinedContributionPlanEmployersMatchingContributionVestingPeriod
Namespace Prefix: | utsi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the maximum amount per employee, by the terms of the plan, that the employer may contribute to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | utsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represents the minimum age of the entity's employees for eligibility to participate in the plan. + References No definition available. + Details
Name: | utsi_DefinedContributionPlanMinimumAgeOfParticipantsForEligibilityToParticipateInPlan
Namespace Prefix: | utsi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of additional plans adopted during the period for defined contribution plans. + References No definition available. + Details
Name: | utsi_DefinedContributionPlanNumberOfAdditionalPlansAdopted
Namespace Prefix: | utsi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration