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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
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