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COMMON STOCK AND STOCK INCENTIVE PLANS (Stock Incentive Plans - Narrative) (Details) | 12 Months Ended
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Dec. 31, 2014
Minimum [Member] |
COMMON STOCK AND STOCK INCENTIVE PLANS [Line Items] |
Vesting period | 1 year
Maximum [Member] |
COMMON STOCK AND STOCK INCENTIVE PLANS [Line Items] |
Vesting period | 4 years
2006 Equity Incentive Plan [Member] |
COMMON STOCK AND STOCK INCENTIVE PLANS [Line Items] |
Number of shares authorized | 1,500,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = utsi_EquityIncentivePlan2006Member
Number of shares transferred from the prior plan | 8,474,347 utsi_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesTransferredFromPriorPlans / us-gaap_PlanNameAxis = utsi_EquityIncentivePlan2006Member
2006 Equity Incentive Plan [Member] | Options and restricted stock units [Member] |
COMMON STOCK AND STOCK INCENTIVE PLANS [Line Items] |
Number of awards outstanding (in shares) | 1,783,638 utsi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOutstandingNumber / us-gaap_AwardTypeAxis = utsi_StockOptionsAndRestrictedStockUnitsRSUMember / us-gaap_PlanNameAxis = utsi_EquityIncentivePlan2006Member
2006 Equity Incentive Plan [Member] | Stock options [Member] |
COMMON STOCK AND STOCK INCENTIVE PLANS [Line Items] |
Vesting period | 4 years
2006 Equity Incentive Plan [Member] | Stock options [Member] | Maximum [Member] |
COMMON STOCK AND STOCK INCENTIVE PLANS [Line Items] |
Expiration term | 7 years
2006 Equity Incentive Plan [Member] | Stock options and stock appreciation rights [Member] | Minimum [Member] |
COMMON STOCK AND STOCK INCENTIVE PLANS [Line Items] |
Exercise price as a percentage of the fair market value of an ordinary share on the date of grant | 100.00%utsi_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisePriceAsPercentageOfFairValueOfCommonStockOnDateOfGrant / us-gaap_AwardTypeAxis = utsi_StockOptionsAndStockAppreciationRightsMember / us-gaap_PlanNameAxis = utsi_EquityIncentivePlan2006Member / us-gaap_RangeAxis = us-gaap_MinimumMember
2006 Equity Incentive Plan [Member] | ISO [Member] | Minimum [Member] |
COMMON STOCK AND STOCK INCENTIVE PLANS [Line Items] |
Exercise price as a percentage of the fair market value of an ordinary share on the date of grant | 110.00%utsi_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisePriceAsPercentageOfFairValueOfCommonStockOnDateOfGrant / us-gaap_AwardTypeAxis = utsi_IncentiveStockOptionMember / us-gaap_PlanNameAxis = utsi_EquityIncentivePlan2006Member / us-gaap_RangeAxis = us-gaap_MinimumMember
Percentage of voting power required of the company's stock for specified exercise price | 10.00%utsi_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfVotingPowerInEntitysCommonStockRequiredForSpecifiedExercisePrice / us-gaap_AwardTypeAxis = utsi_IncentiveStockOptionMember / us-gaap_PlanNameAxis = utsi_EquityIncentivePlan2006Member / us-gaap_RangeAxis = us-gaap_MinimumMember
2006 Equity Incentive Plan [Member] | ISO [Member] | Maximum [Member] |
COMMON STOCK AND STOCK INCENTIVE PLANS [Line Items] |
Expiration term | 5 years
Percentage of voting power required of the company's stock for specified vesting period | 10.00%utsi_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfVotingPowerInEntitysCommonStockRequiredForSpecifiedVestingPeriod / us-gaap_AwardTypeAxis = utsi_IncentiveStockOptionMember / us-gaap_PlanNameAxis = utsi_EquityIncentivePlan2006Member / us-gaap_RangeAxis = us-gaap_MaximumMember

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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Represents the exercise price as a percentage of the fair market value of a single share of common stock on the date of grant. + References No definition available. + Details
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- Definition The period of time from the grant date until the time at which the share-based award expires. + References No definition available. + Details
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- Definition Represents the number of shares originally approved (usually by shareholders and board of directors) for awards under the prior plan of equity based compensation transferred to the current plan. + References No definition available. + Details
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- Definition Represents the number of shares reserved for issuance under stock plans that validly exist and are outstanding as of the balance sheet date. + References No definition available. + Details
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- Definition Represents the percentage of voting power in the entity's common stock required for a specified exercise price to be effective. + References No definition available. + Details
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- Definition Represents the percentage of voting power in the entity's common stock required for a specified vesting period to be effective. + References No definition available. + Details
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