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Note 1 - Summary of Operations and Significant Accounting Policies (Details Narrative) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Note 1 - Summary Of Operations And Significant Accounting Policies Details Narrative |  |
Impairments of long-lived assets | $ 0us-gaap_ImpairmentOfLongLivedAssetsHeldForUse | $ 0us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Impairments of indefinite lived intangible assets | 0us-gaap_GoodwillAndIntangibleAssetImpairment | 0us-gaap_GoodwillAndIntangibleAssetImpairment
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months | 233us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths |
Finite-Lived Intangible Assets, Amortization Expense, Year Two | 167us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo |
Finite-Lived Intangible Assets, Amortization Expense, Year Three | 122us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree |
Finite-Lived Intangible Assets, Amortization Expense, Year Four | 86us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour |
Finite-Lived Intangible Assets, Amortization Expense, Year Five | 63us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive |
Foreign Currency Transaction Gain (Loss), Realized | 235us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 128us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Advertising Expense | 43us-gaap_AdvertisingExpense | 114us-gaap_AdvertisingExpense
Total research and development spending | 5,648ulbi_ResearchAndDevelopmentExpenseGross | 6,262ulbi_ResearchAndDevelopmentExpenseGross
Customer sponsored R&D included in cost of goods sold | 315ulbi_CustomerFundedResearchAndDevelopmentExpenseIncludedInCostOfGoodsSold | 403ulbi_CustomerFundedResearchAndDevelopmentExpenseIncludedInCostOfGoodsSold
Revenue recognized relating to customer sponsored R&D | $ 317ulbi_ResearchAndDevelopmentRevenue | $ 403ulbi_ResearchAndDevelopmentRevenue
Significant customer disclosure - revenue from large defense contractor | 18.00%ulbi_ConcentrationRiskPercentageSignificantCustomer1 | 25.00%ulbi_ConcentrationRiskPercentageSignificantCustomer1
Significant customers - trade accounts receivable - largest | 16.00%ulbi_ConcentrationRiskPercentageAccountsReceivable1 | 26.00%ulbi_ConcentrationRiskPercentageAccountsReceivable1
Significant customers - trade accounts receivable - next largest |  | 15.00%ulbi_ConcentrationRiskPercentageAccountsReceivable2
Employee stock options excluded from calculation of diluted earnings per share | 2,195,222us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 2,251,622us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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