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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Treasury Stock [Member] | Accumulated Deficit [Member] | Accumulated Other Comprehensive Income [Member] | Non-controlling interest [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2011 | $ 271,039 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | $ 182 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember | $ 1,306,780 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (6,301)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ (1,118,916)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 82,893 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 6,401 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Balance (in shares) at Dec. 31, 2011 |  | 50,605,000 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Repurchase of ordinary shares | (8,842)us-gaap_TreasuryStockValueAcquiredCostMethod |  |  | (8,842)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |
Repurchase of ordinary shares (in shares) |  | (2,611,000)us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember |  |  |  |  |
Repurchase of ordinary share from UiTV shareholder | (5,278)utsi_TreasuryStockValueAcquiredFromSubsidiaryShareholdersCostMethod |  |  | (5,278)utsi_TreasuryStockValueAcquiredFromSubsidiaryShareholdersCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |
Repurchase of ordinary share from UiTV shareholder (in shares) |  | (1,491,000)utsi_TreasuryStockSharesAcquiredTreasuryStockValueAcquiredFromSubsidiaryShareholders / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember |  |  |  |  |
Restricted stock issued and restricted stock units released (in shares) |  | 1,271,000 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember |  |  |  |  |
Stock-based compensation | 2,981 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  | 2,981 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |
Restricted stock cancellation (in shares) |  | (118,000)us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember |  |  |  |  |
Net loss | (35,579)us-gaap_ProfitLoss |  |  |  | (34,385)us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | (1,194)us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Derecognition of non-controlling interests on deconsolidation of a subsidiary | (4,393)us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation |  |  |  |  |  | (4,393)us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Other comprehensive income: |  |  |  |  |  |  |
Foreign currency translation | (3,272)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax |  |  |  |  | (3,272)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Unrealized gain from available-for-sale investments |  |  |  |  |  |  |
Balance at Dec. 31, 2012 | 216,656 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 182 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember | 1,309,761 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (20,421)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | (1,153,301)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 79,621 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 814 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Balance (in shares) at Dec. 31, 2012 |  | 47,656,000 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Repurchase of ordinary shares | (30,680)us-gaap_TreasuryStockValueAcquiredCostMethod | (31)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember | (30,649)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |
Repurchase of ordinary shares (in shares) |  | (8,333,000)us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember |  |  |  |  |
Repurchase of ordinary share from UiTV shareholder |  |  |  |  |  |  |
Restricted stock issued and restricted stock units released (in shares) |  | 455,000 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember |  |  |  |  |
Stock-based compensation | 1,698 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  | 1,698 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |
Net loss | (22,730)us-gaap_ProfitLoss |  |  |  | (22,721)us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | (9)us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Derecognition of non-controlling interests on deconsolidation of a subsidiary | (805)us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation |  |  |  |  |  | (805)us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Other comprehensive income: |  |  |  |  |  |  |
Foreign currency translation | (6,671)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax |  |  |  |  | (6,671)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
CTA recognition on liquidation of the subsidiaries | (7,088)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax |  |  |  |  | (7,088)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Unrealized gain from available-for-sale investments |  |  |  |  |  |  |
Balance at Dec. 31, 2013 | 150,380 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 151 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember | 1,280,810 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (20,421)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | (1,176,022)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 65,862 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Balance (in shares) at Dec. 31, 2013 | 39,778,000 us-gaap_CommonStockSharesOutstanding | 39,778,000 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
New issuance of ordinary shares | 5,340 us-gaap_StockIssuedDuringPeriodValueNewIssues | 8 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember | 5,332 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |
New issuance of ordinary shares (in shares) |  | 2,000,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember |  |  |  |  |
Repurchase of ordinary shares | (10,308)us-gaap_TreasuryStockValueAcquiredCostMethod |  |  | (10,308)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |
Repurchase of ordinary shares (in shares) |  | (4,050,000)us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember |  |  |  |  |
Repurchase of ordinary share from UiTV shareholder |  |  |  |  |  |  |
Restricted stock issued and restricted stock units released (in shares) |  | 420,000 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember |  |  |  |  |
Stock-based compensation | 2,289 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  | 2,289 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |
Treasury stock retirement |  | (37)us-gaap_TreasuryStockRetiredCostMethodAmount / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember | (30,249)us-gaap_TreasuryStockRetiredCostMethodAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 30,286 us-gaap_TreasuryStockRetiredCostMethodAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |
Net loss | (30,264)us-gaap_ProfitLoss |  |  |  | (30,264)us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Derecognition of non-controlling interests on deconsolidation of a subsidiary |  |  |  |  |  |  |
Other comprehensive income: |  |  |  |  |  |  |
Foreign currency translation | (2,902)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax |  |  |  |  | (2,902)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
CTA recognition on liquidation of the subsidiaries | 121 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax |  |  |  |  | 121 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Unrealized gain from available-for-sale investments | 673 us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax |  |  |  |  | 673 us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Balance at Dec. 31, 2014 | $ 115,329 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | $ 122 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember | $ 1,258,182 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (443)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ (1,206,286)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 63,754 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
Balance (in shares) at Dec. 31, 2014 | 38,148,000 us-gaap_CommonStockSharesOutstanding | 38,148,000 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = utsi_CommonStockOutstandingMember |  |  |  |  |

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- Definition This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation". + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415241&loc=d3e4534-113899 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11149-113907 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11178-113907 + Details
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