Document And Entity Information
Dividends
Note To Financial Statement Details Textual
Significant Accounting Policies
Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
Note 1 - Summary of Operations and Significant Accounting Policies
Risk-free interest rate
Note 2 - Debt
Note 3 - Supplemental Balance Sheet Information
Note 4 - Commitments and Contingencies
Note 5 - Stock-based Compensation
Note 6 - Income Taxes
Note 7 - Operating Leases
Note 9 - Business Segment Information
Income Tax Disclosure [Text Block]
Note 1 - Summary of Operations and Significant Accounting Policies - Property, Plant and Equipment Estimated Useful Life (Details)
Note 2 - Debt - Future Minimum Principal Repayment Obligations (Details)
ulbi_LineOfCreditFacilityMaximumBorrowingCapacityContingentOnBankApproval
Line Of Credit Facility Maximum Borrowing Capacity Contingent On Bank Approval
Represents line of credit facility maximum borrowing capacity contingent on bank approval.
Note 3 - Supplemental Balance Sheet Information - Cash and Restricted Cash (Details)
Volatility factor
Note 3 - Supplemental Balance Sheet Information - Components of Inventory (Details)
us-gaap_LiabilitiesCurrent
Total current liabilities
Note 3 - Supplemental Balance Sheet Information - Components of Property, Plant and Equipment (Details)
Schedule of Maturities of Long-Term Debt [Table Text Block]
Note 3 - Supplemental Balance Sheet Information - Summary of Goodwill (Details)
Note 3 - Supplemental Balance Sheet Information - Composition of Intangible Assets (Details)
Accrued expenses and other current liabilities
us-gaap_OtherLiabilitiesCurrent
Weighted average expected life (years) (Year)
Note 3 - Supplemental Balance Sheet Information - Amortization of Intangible Assets (Details)
Note 4 - Commitments and Contingencies - Changes in Produce Warranty Liability (Details)
Note 5 - Stock-based Compensation - Non-cash Stock Compensation Expense (Details)
Note 5 - Stock-based Compensation - Stock Option Assumptions (Details)
Note 5 - Stock-based Compensation - Stock Option Activity (Details)
Purchase Commitment, Excluding Long-Term Commitment [Axis]
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Note 5 - Share-based Compensation - Options Range of Exercise Prices (Details)
Purchase Commitment, Excluding Long-Term Commitment [Domain]
Note 6 - Income Taxes - Income Tax Expense (Details)
Note 6 - Income Taxes - Deferred Tax Assets and Liabilities (Details)
Note 6 - Income Taxes - Net Deferred Tax Liabilities (Details)
Note 6 - Income Taxes - United States and Foreign Income (Loss) From Continuing Operations Before Income Taxes (Details)
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Note 6 - Income Taxes - Effective Rate Reconciliation (Details)
Note 7 - Operating Leases - Lease Cost (Details)
Note 7 - Operating Leases - Supplement Cash Flow Information Related to Leases (Details)
Note 7 - Operating Leases - Supplemental Balance Sheet Information Related to Leases (Details)
Note 7 - Operating Leases - Future Minimum Lease Payments (Details)
Note 9 - Business Segment Information - Segment Activity (Details)
Note 9 - Business Segment Information - Revenue by Business Segment Sector (Details)
Foreign currency translation adjustments
us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Options vested and expected to vest - weighted average remaining contractual term (Year)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Current portion of long-term debt
Options vested and expected to vest - weighted average exercise price (in dollars per share)
Other comprehensive (loss) income:
Options exercisable - aggregate intrinsic value
Vested and Expected to Vest (in shares)
Options vested and expected to vest - aggregate intrinsic value
Options exercisable – weighted average remaining contractual term (Year)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value
us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Total shareholders’ equity
Balance
Balance
Options exercisable – aggregate intrinsic value (in shares)
Options outstanding - weighted average remaining contractual term (Year)
Options outstanding - aggregate intrinsic value
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
us-gaap_SecuredDebtCurrent
Secured Debt, Total
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Options outstanding - weighted average exercise price (in dollars per share)
Options outstanding - weighted average exercise price (in dollars per share)
Options forfeited or expired (in dollars per share)
Options granted (in dollars per share)
Schedule of Goodwill [Table Text Block]
Options exercised (in dollars per share)
Accrued compensation and related benefits
us-gaap_EmployeeRelatedLiabilitiesCurrent
Lessee, Operating Leases [Text Block]
Accounts payable
us-gaap_AccountsPayableCurrent
Revolving Credit Facility [Member]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number
Shares under option, beginning of period (in shares)
Shares under option, end of period (in shares)
Construction in process in accounts payable
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
Options forfeited or expired (in shares)
Credit Facility [Axis]
Credit Facility [Domain]
Trademarks [Member]
Cash, Cash Equivalents and Investments [Table Text Block]
us-gaap_PolicyTextBlockAbstract
Accounting Policies
Trade Names [Member]
Other Intangible Assets [Member]
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchases of property, plant and equipment
us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)
Current Liabilities:
Supplemental Balance Sheet Disclosures [Text Block]
Sales Commissions [Policy Text Block]
Disclosure of accounting policy for sales commissions.
Patented Technology [Member]
Total assets
us-gaap_Assets
Total assets
Total assets
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]
Plan Name [Axis]
Shareholders' Equity and Share-Based Payments [Text Block]
Plan Name [Domain]
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Customer Relationships [Member]
Deferred income taxes, net
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Shipping and Handling Costs [Policy Text Block]
Disclosure of accounting policy for the classification of shipping and handling costs, including whether the costs are included in cost of sales or included in other income statement accounts. If shipping and handling fees are significant and are not included in cost of sales, disclosure includes both the amounts of such costs and the line item on the income statement which includes such costs.
Award Type [Domain]
Business Description and Accounting Policies [Text Block]
Restricted cash
us-gaap_RestrictedCashAndCashEquivalents
Restricted Cash and Cash Equivalents
Net loss attributable to Ultralife
us-gaap_NetIncomeLoss
Loss attributable to Ultralife Corporation
Award Type [Axis]
Accumulated amortization
Net
Cost
Non-controlling interest
Net (loss) income attributable to non-controlling interest
Restricted Stock [Member]
Share-Based Payment Arrangement, Option [Member]
us-gaap_GoodwillForeignCurrencyTranslationGainLoss
Effect of foreign currency translation
us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Less – Accumulated depreciation
Commitments and Contingencies Disclosure [Text Block]
Property, plant and equipment, net
Total
Goodwill
Goodwill
Balance – January 1, 2022
Balance – December 31, 2022
Property, plant and equipment, gross
Foreign currency translation adjustments
Net loss
Net loss
INVESTING ACTIVITIES:
us-gaap_DeferredFinanceCostsGross
Debt Issuance Costs, Gross
Income tax benefit
Income tax (benefit) provision
Income Tax Expense (Benefit)
Total income tax (benefit) provision
Income Tax Expense (Benefit)
us-gaap_OperatingExpenses
Total operating expenses
us-gaap_DebtInstrumentTerm
Debt Instrument, Term
us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Defined Contribution Plan, Employer Discretionary Contribution Amount
us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
Cash
us-gaap_Cash
Cash
us-gaap_CashAndCashEquivalentsAtCarryingValue
Stock options
Amendment Flag
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive loss attributable to Ultralife Corporation
City Area Code
Use of Estimates, Policy [Policy Text Block]
New Accounting Pronouncements, Policy [Policy Text Block]
Accounts payable and other liabilities
Reclassification, Comparability Adjustment [Policy Text Block]
Income taxes receivable and payable
Common stock, shares outstanding (in shares)
Balance (in shares)
Balance (in shares)
Current Fiscal Year End Date
us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Debt Instrument, Basis Spread on Variable Rate
Variable lease cost
us-gaap_LeaseCost
Total lease cost
Weighted-average discount rate
Document Fiscal Period Focus
Operating lease cost
Document Fiscal Year Focus
us-gaap_IncreaseDecreaseInDeferredIncomeTaxes
Deferred income tax expense
Consolidation, Policy [Policy Text Block]
Lease, Cost [Table Text Block]
dei_DocumentPeriodEndDate
Document Period End Date
Right-of-use assets obtained in exchange for lease liabilities:
us-gaap_IncreaseDecreaseInPrepaidExpense
Prepaid expenses and other assets
Weighted-average remaining lease term (years) (Year)
dei_EntityFileNumber
Entity File Number
Entity Emerging Growth Company
us-gaap_DebtInstrumentFaceAmount
Debt Instrument, Face Amount
dei_DocumentType
Document Type
Entity Small Business
dei_EntityShellCompany
Entity Shell Company
Document Information [Line Items]
Document Information [Table]
dei_EntityPublicFloat
Entity Public Float
Entity Filer Category
Debt Instrument [Axis]
dei_EntityCurrentReportingStatus
Entity Current Reporting Status
Debt Instrument, Name [Domain]
dei_EntityVoluntaryFilers
Entity Voluntary Filers
dei_EntityWellKnownSeasonedIssuer
Entity Well-known Seasoned Issuer
Variable Rate [Domain]
us-gaap_CapitalizedContractCostGross
Capitalized Contract Cost, Gross
us-gaap_GoodwillImpairmentLoss
Goodwill, Impairment Loss
Variable Rate [Axis]
us-gaap_IncreaseDecreaseInAccountsReceivable
Accounts receivable
us-gaap_ConcentrationRiskPercentage1
Concentration Risk, Percentage
Entity Tax Identification Number
Entity Central Index Key
us-gaap_DepreciationAndAmortization
Depreciation and amortization of intangible assets
dei_EntityRegistrantName
Entity Registrant Name
Stock-based compensation -stock options
Entity [Domain]
Customer Concentration Risk [Member]
Legal Entity [Axis]
Entity Address, Address Line One
Amortization of intangible assets
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Entity Address, City or Town
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
NETHERLANDS
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Entity Address, Postal Zip Code
Entity Address, State or Province
Concentration Risk Type [Axis]
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Treasury stock - at cost; 4,435,352 shares and 4,432,595 shares, respectively
Concentration Risk Type [Domain]
Material Terms of Trading Arrangement [Text Block]
dei_EntityCommonStockSharesOutstanding
Entity Common Stock, Shares Outstanding (in shares)
Revenue Benchmark [Member]
us-gaap_IncreaseDecreaseInInventories
Inventories
Trading Symbol
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Local Phone Number
Stock option exercises (in shares)
Options exercised (in shares)
us-gaap_TableTextBlock
Notes Tables
Vesting of restricted stock (in shares)
us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity
Stock option exercises
Vesting of restricted stock
us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage
Selling, general and administrative
Options granted (in shares)
Line of Credit Facility, Lender [Domain]
Raw materials
Lender Name [Axis]
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and shareholders' equity
Finished products
Work in process
UNITED STATES
Accumulated deficit
us-gaap_ResearchAndDevelopmentExpense
Research and development
Accumulated other comprehensive loss
Changes in operating assets and liabilities:
Debt Disclosure [Text Block]
Amortization of financing fees
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
Operating lease liability, net of current portion
Schedule of Inventory, Current [Table Text Block]
Total operating lease liability
Present value of remaining lease payments
Current operating lease liability
Other intangible assets, net
Retirement Benefits [Text Block]
Operating lease right-of-use asset
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total lease payments
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less: Imputed interest
us-gaap_DeferredIncomeTaxExpenseBenefit
Deferred Income Tax Expense (Benefit)
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree
2026
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour
2027
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive
Lessee, Operating Lease, Liability, to be Paid, Year Five
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
Thereafter
Fair Value Measurement, Policy [Policy Text Block]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Finite-Lived Intangible Asset, Expected Amortization, Year Two
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
Finite-Lived Intangible Asset, Expected Amortization, Year Three
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
Finite-Lived Intangible Asset, Expected Amortization, Year Four
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
2024
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Finite-Lived Intangible Asset, Expected Amortization, Year Five
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
2025
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
Finite-Lived Intangible Asset, Expected Amortization, Year One
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Other noncurrent assets
us-gaap_OtherAssetsNoncurrent
Stock-based compensation
us-gaap_ShareBasedCompensation
Stock-based compensation
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Lessee, Leases [Policy Text Block]
Business Combinations Policy [Policy Text Block]
Earnings Per Share, Policy [Policy Text Block]
Revenue
us-gaap_Revenues
Operating expenses:
Income Tax, Policy [Policy Text Block]
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Research and Development Expense, Policy [Policy Text Block]
Depreciation
Depreciation
us-gaap_AssetsCurrent
Total current assets
Share-Based Payment Arrangement [Policy Text Block]
Treasury Stock, Common, Shares (in shares)
Common stock – par value $.10 per share; authorized 40,000,000 shares; issued – 20,570,710 shares and 20,522,427 shares, respectively;outstanding – 16,135,358 shares and 16,089,832 shares, respectively
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Common Stock, Shares Authorized (in shares)
Common stock, shares issued (in shares)
Common stock, par value (in dollars per share)
Thereafter
Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Common Stock, Capital Shares Reserved for Future Issuance
us-gaap_DeferredTaxAssetsValuationAllowance
Valuation allowance for deferred tax assets
Deferred Tax Assets, Valuation Allowance
Statistical Measurement [Domain]
Environmental Cost, Expense Policy [Policy Text Block]
Operating cash flows from operating leases
Maximum [Member]
Minimum [Member]
Guarantees, Indemnifications and Warranties Policies [Policy Text Block]
Product and Service [Axis]
Product and Service [Domain]
us-gaap_DeferredTaxAssetsNet
Net deferred tax assets
Statistical Measurement [Axis]
Preferred stock – par value $.10 per share; authorized 1,000,000 shares; none issued
us-gaap_NumberOfReportingUnits
Number of Reporting Units
Deferred Tax Assets, Net
Net deferred tax assets
Preferred Stock, Shares Issued (in shares)
Interest paid
Income taxes paid
KeyBank [Member]
Related to the lender KeyBank.
us-gaap_NoncurrentAssets
Long-Lived Assets
Geographical [Axis]
Goodwill and Intangible Assets, Policy [Policy Text Block]
Geographical [Domain]
us-gaap_DeferredTaxAssetsGross
Total deferred tax assets
Property, Plant and Equipment [Table Text Block]
Preferred Stock, Shares Authorized (in shares)
us-gaap_DeferredIncomeTaxLiabilities
Total deferred tax liabilities
Inventories, net
Total
Preferred stock, par value (in dollars per share)
Revenues
Research and development
Lessee, Lease, Cash Flow Information [Table Text Block]
Tabular disclosure of cash flow information related lessee's lease .
Customer [Axis]
Customer [Domain]
Intangible assets
us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets
Lessee, Lease, Balance Sheet Information [Table Text Block]
Tabular disclosure of balance sheet information related lessee's lease .
us-gaap_ProductWarrantyAccrualPayments
Settlements made
us-gaap_PropertyPlantAndEquipmentGrossPeriodIncreaseDecrease
Capital expenditures
Stock-based compensation -restricted stock
This element represents the amount of recognized equity-based compensation related to restricted stock options during the period.
Accruals for warranties issued
Accrued expenses, reserves and other
us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
Buildings (Year)
Non-controlling interest
Construction in Progress [Member]
OPERATING ACTIVITIES:
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Revenue [Policy Text Block]
Statement [Line Items]
Trade accounts receivable, allowance for doubtful accounts
Trade accounts receivable, net of allowance for doubtful accounts of $303 and $346, respectively
Furniture and Fixtures [Member]
us-gaap_NumberOfOperatingSegments
Number of Operating Segments
Capital in excess of par value
Building and Building Improvements [Member]
Building [Member]
AOCI Attributable to Parent [Member]
Shareholders' Equity:
Schedule of Product Warranty Liability [Table Text Block]
Land [Member]
Interest and financing expense
ulbi_CustomerFundedResearchAndDevelopmentExpenseIncludedInCostOfGoodsSold
Customer Funded Research and Development Expense Included in Cost of Goods Sold
Represents the amount of R&D included in cost of goods sold that is customer funded.
Property, Plant and Equipment, Policy [Policy Text Block]
us-gaap_OtherNonoperatingIncomeExpense
Miscellaneous income
us-gaap_NonoperatingIncomeExpense
Total other expense, net
Other expense, net
Long-Lived Tangible Asset [Axis]
Long-Lived Tangible Asset [Domain]
ulbi_ResearchAndDevelopmentExpenseGross
Research and Development Expense, Gross
The gross costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.
Tax credit carryforwards
us-gaap_DeferredTaxAssetsTaxCreditCarryforwards
Segment Reporting Disclosure [Text Block]
Net operating loss carryforwards
Government & Defense [Member]
Represents information pertaining to the Government and Defense customer.
Revenue, percentage
The percentage of total revenue for the period.
Commercial [Member]
Represents information pertaining to the Commercial customer.
Current Assets:
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents
Total
Cash - Beginning of year
Cash - End of year
Schedule of Revenues from External Customers by Business Segment Sector [Table Text Block]
Tabular disclosure of material revenue from specific sectors of each business segment.
Inventory, Policy [Policy Text Block]
Property, Plant and Equipment, Estimated Useful Life [Table Text Block]
The tabular disclosure of estimated useful life for property, plant and equipment.
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
DECREASE IN CASH
us-gaap_Liabilities
Total liabilities
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash provided by financing activities
Commitments and Contingencies
Effect of exchange rate changes on cash
Segment contribution
us-gaap_OperatingIncomeLoss
Operating income
Other expense (income):
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash (used in) provided by operating activities
Prepaid expenses and other current assets
us-gaap_PrepaidExpenseAndOtherAssetsCurrent
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash used in investing activities
us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets
Intangible assets
Cost of products sold
us-gaap_GrossProfit
Gross profit
us-gaap_DeferredTaxLiabilitiesDeferredExpense
Accrued expenses, reserves and other
Deferred income taxes
Deferred tax liabilities
ulbi_DefinedContributionPlanMaximumEmployeeContributionPercentageSubjectToEmployerMatchingContribution
Defined Contribution Plan, Maximum Employee Contribution Percentage, Subject to Employer Matching Contribution
The maximum employee contribution percentage that is subject to employer matching contribution within a defined contribution plan.
Schedule of Net Deferred Tax Liabilities [Table Text Block]
Tabular disclosure of the components of net deferred tax liability recognized in an entity's statement of financial position.
Concentration Risk, Credit Risk, Policy [Policy Text Block]
us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Tax withholdings on stock-based awards
Secured Overnight Financing Rate (SOFR) [Member]
Interest rate based on U.S. Treasury repurchases between banks.
ulbi_ExtendedProductWarrantyPeriod
Extended Product Warranty, Period
Period for extended product warranty.
Extended Warranty Contracts [Member]
Represents extended warranty contracts.
ulbi_StandardProductWarrantyPeriod
Standard Product Warranty, Period
Period for standard product warranty.
us-gaap_ProductWarrantyAccrual
Accrued warranty obligations – beginning
Accrued warranty obligations - ending
Noncontrolling Interest [Member]
The 2014 Long-term Incentive Plan [Member]
Represents the long-term incentive stockholder's equity compensation plan.
Range Three [Member]
Represents information pertaining to range three.
Range One [Member]
Represents information pertaining to range one.
Range Two [Member]
Represents information pertaining to range two.
Forfeiture rate
The forfeiture rate assumption that is used in valuing an option on its own shares.
Retained Earnings [Member]
Range Four [Member]
Represents information pertaining to range four.
Proceeds from exercise of stock options
Proceeds from Stock Options Exercised
State
Treasury Stock, Common [Member]
Foreign
us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Foreign
Additional Paid-in Capital [Member]
Common Stock [Member]
us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Federal
Equity Components [Axis]
Equity Component [Domain]
us-gaap_LongTermDebt
Total
us-gaap_CurrentIncomeTaxExpenseBenefit
Current Income Tax Expense (Benefit)
Other Noncurrent Assets [Member]
us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
us-gaap_RevenueRemainingPerformanceObligation
Revenue, Remaining Performance Obligation, Amount
us-gaap_EffectiveIncomeTaxRateReconciliationGiltiPercent
Global intangible low-taxed income
Global intangible low-taxed income
Other Noncurrent Liabilities [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Foreign
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Loss before income taxes
Accrued Expenses and Other Current Liabilities [Member]
Related to accrued expenses and other current liabilities.
United States
Accrued Expenses and Other Current Liabilites and Other Noncurrent Liabilities [Member]
Related to accured expenses and other current liabilities and other noncurrent liabilities.
Capital Addition Purchase Commitments [Member]
The amount of capital addition purchase commitments.
dei_IcfrAuditorAttestationFlag
ICFR Auditor Attestation Flag
us-gaap_LineOfCredit
Long-Term Line of Credit, Total
us-gaap_PaymentsOfDebtIssuanceCosts
Payment of debt issuance costs
Her Majesty's Revenue and Customs (HMRC) [Member]
State and Local Jurisdiction [Member]
Income Tax Authority, Name [Axis]
Income Tax Authority, Name [Domain]
us-gaap_SecuredDebt
Secured Debt, Total
Internal Revenue Service (IRS) [Member]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Domestic Tax Authority [Member]
ulbi_DefinedContributionPlanEmployerMatchingContributionFirst3PercentOfMatch
Defined Contribution Plan, Employer Matching Contribution, First 3%, Percent of Match
The percentage that employers match on first 3% of contribution from employee.
Foreign Tax Authority [Member]
ulbi_DefinedContributionPlanEmployerMatchingContributionNext2PercentOfMatch
Defined Contribution Plan, Employer Matching Contribution, Next 2%, Percent of Match
The percentage that an employer will match on next 2 % of employee contributions.
Document Annual Report
Machinery and Equipment [Member]
Computer Equipment [Member]
Cash and Cash Equivalents, Policy [Policy Text Block]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
ulbi_DefinedContributionPlanMaximumEmployeeContributionPercentageSubjectToEmployer50MatchingContribution
Defined Contribution Plan, Maximum Employee Contribution Percentage, Subject to Employer 50% Matching Contribution
The maximum employee contribution percentage that is subject to employer matching 50% of contribution within a defined contribution plan.
Receivable [Policy Text Block]
Entity Incorporation, State or Country Code
ulbi_NumberOfMajorCustomers
Number of Major Customers
Represents the number of major customers.
us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits, Ending Balance
Accounting Policies [Abstract]
us-gaap_OpenTaxYear
Open Tax Year
Document Transition Report
dei_DocumentFinStmtErrorCorrectionFlag
Document Financial Statement Error Correction [Flag]
Large Defense Primary Contractor, 1 [Member]
Represents large defense primary contractor 1.
Selling, General and Administrative Expenses [Member]
dei_EntityInteractiveDataCurrent
Entity Interactive Data Current
Awards Other than Stock Options and SARs [Member]
Represents awards other than stock options and SARs.
Security Exchange Name
Title of 12(b) Security
Research and Development Expense [Member]
Income Statement Location [Axis]
Income Statement Location [Domain]
Auditor Name
Auditor Firm ID
Auditor Location
Segments [Axis]
Segments [Domain]
Corporate Segment [Member]
us-gaap_TaxCreditCarryforwardAmount
Tax Credit Carryforward, Amount
General Business Tax Credit Carryforward [Member]
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Weighted average shares outstanding – Diluted (in shares)
us-gaap_RepaymentsOfLinesOfCredit
Payment of credit facilities
Tax Credit Carryforward [Axis]
Tax Credit Carryforward, Name [Domain]
Non-US [Member]
us-gaap_OperatingLossCarryforwards
Operating Loss Carryforwards
Borrowings on credit facility
Statement [Table]
Statement of Financial Position [Abstract]
Net loss per share attributable to Ultralife Corporation common shareholders – Diluted (in dollars per share)
Weighted average shares outstanding – Basic (in shares)
us-gaap_EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent
Other
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Effective income tax rate
Net loss per share attributable to Ultralife Corporation common shareholders – Basic (in dollars per share)
us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
Foreign tax rate change
Statement of Cash Flows [Abstract]
Statement of Stockholders' Equity [Abstract]
Income Statement [Abstract]
2026
2027
us-gaap_LesseeOperatingLeaseRemainingLeaseTerm
Lessee, Operating Lease, Remaining Lease Term (Year)
2024
2025
us-gaap_EffectiveIncomeTaxRateReconciliationDeductions
China R&D deduction
China R&D deduction
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
Equity compensation
Equity compensation
Finite-Lived Intangible Assets Amortization Expense [Table Text Block]
us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
States taxes
States taxes
us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Foreign tax rates
us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
Income tax credits
Income tax credits
Net Cash Provided by (Used in) Financing Activities [Abstract]
Other noncurrent liabilities
us-gaap_OtherLiabilitiesNoncurrent
us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Statutory income tax rate
ulbi_MaximumConsolidatedSeniorLeverageRatio
Maximum Consolidated Senior Leverage Ratio
Represents information related to consolidated senior leverage ratio.
Term Loan Facility [Member]
Represents information related to term loan facility.
Amended Credit Agreement [Member]
Represents information related to Amended Credit Agreement.
Long-term Debt, Current Maturities [Member]
Represents Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligation
Communications Systems Segment [Member]
Represents the company's communications systems segment.
Battery & Energy Products Segment [Member]
Represents the company's battery & energy products segment.
us-gaap_StockholdersEquity
Total Ultralife Corporation equity
Class of Stock [Axis]
Long-term debt, net
Options outstanding, weighted-average exercise price (in dollars per share)
Options outstanding, weighted-average remaining contractual life (Year)
Options exercisable, number of options exercisable (in shares)
Options exercisable – weighted average exercise price (in dollars per share)
Upper range limit (in dollars per share)
Options outstanding, number of outstanding options (in shares)
us-gaap_LongTermPurchaseCommitmentAmount
Long-Term Purchase Commitment, Amount
Exercise Price Range [Axis]
Exercise Price Range [Domain]
Lower range limit (in dollars per share)