Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Accounting Policies [Abstract] Accounting Policies [Abstract] Accounts Payable, Current Accounts payable Accounts Receivable, Net, Current Trade accounts receivable, net Accrued Income Taxes Income taxes payable Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less-Accumulated depreciation Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Accutronics Limited [Member] Accutronics Limited [Member] Accutronics Limited Additional Paid in Capital Capital in excess of par value Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by (used in) operating activities: Allowance for Doubtful Accounts Receivable, Current Trade accounts receivable allowance for doubtful accounts Amendment Flag Amendment Flag Amortization of Intangible Assets Amortization expense Amortization of intangible assets Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Employee stock options excluded from calculation of diluted earnings per share Assets Total assets Total assets Assets [Abstract] ASSETS Assets, Current Total current assets Assets, Current [Abstract] Current assets: Award Type [Axis] Award Type [Axis] Battery [Member] Battery [Member] Battery & Energy Products Buildings and Improvements, Gross Buildings and leasehold improvements Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Effective Date of Acquisition Business acquisition date Business Acquisition [Line Items] Business Acquisition [Line Items] Business Acquisition, Pro Forma Earnings Per Share, Basic Basic Business Acquisition, Pro Forma Earnings Per Share, Diluted Diluted Business Acquisition, Pro Forma Information [Abstract] Business Acquisition, Pro Forma Information [Abstract] Business Acquisition, Pro Forma Information [Table Text Block] Business Acquisition, Pro Forma Information Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax Operating Income Business Acquisition, Pro Forma Net Income (Loss) Net Income Business Acquisition, Pro Forma Revenue Revenue Business Combination, Acquisition Related Costs Acquisition costs Business Combination, Consideration Transferred Total aggregate purchase price Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Business Acquisition, Pro Forma Net Income (Loss) Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Business Acquisition, Pro Forma Revenue Business combination recognized identifiable assets acquired and liabilities assumed accrued liabilities current. Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Accrued Liabilities Current Accrued Expenses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Prepaids and Other Current Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Accounts Receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Accounts Payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Income Taxes on Intangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Income Taxes on Intangible Assets Deferred Income Taxes on Intangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Current Income Taxes Payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent Deferred Income Taxes Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Identifiable Intangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Inventory Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities Non-Current Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Property, Plant & Equipment Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Total Consideration Business Combinations [Abstract] Business Combinations [Abstract] Business Description and Basis of Presentation [Text Block] Basis of Presentation Business Insurance Recoveries [Text Block] FIRE AT MANUFACTURING FACILITY Business Interruption Insurance Deductible Business Interruption Insurance Deductible Business Interruption, Insurance Deductible Business Interruption Loss Gross Business Interruption Loss Gross Business Interruption Loss, Gross Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Cash and cash equivalents, beginning of period Cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS Commitments and Contingencies Commitments and contingencies Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] COMMITMENTS AND CONTINGENCIES Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock - shares authorized Common Stock, Shares, Issued Common stock - shares issued Common Stock, Shares, Outstanding Common stock - shares outstanding Common Stock, Value, Issued Common stock Comms [Member] Comms [Member] Communications Systems Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income attributable to Ultralife Corporation Construction in Progress, Gross Construction in process Corporate Segment [Member] Corporate Segment [Member] Cost of Revenue Cost of products sold Current Federal Tax Expense (Benefit) Federal tax provision Current Fiscal Year End Date Current Fiscal Year End Date Current Foreign Tax Expense (Benefit) Foreign tax provision Current State and Local Tax Expense (Benefit) State tax provision Customer [Member] Customer [Member] Customer Relationships Debt and Capital Leases Disclosures [Text Block] Revolving Credit Agreement Debt Disclosure [Abstract] Debt Disclosure [Abstract] Deferred Income Tax Expense (Benefit) Deferred tax provision Deferred Tax Assets, Net of Valuation Allowance, Current Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Deferred income taxes Depreciation Depreciation expense Depreciation, Depletion and Amortization, Nonproduction Depreciation Depreciation, Depletion and Amortization Amortization of financing fees Dilutive Securities Included In Computation Of Earnings Per Share Amount Dilutive Securities Included In Computation Of Earnings Per Share Amount Number of Employee stock options included in calculation of diluted earnings per share Dilutive Securities Included In Computation Of Earnings Per Share Amount Restricted Stock Dilutive Securities Included In Computation Of Earnings Per Share Amount Restricted Stock Number of restricted shares included in calculation of diluted earnings per share Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Components of Stock-based Compensation Expense Distributor [Member] Distributor [Member] Distributor Relationships Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Document Type Document Type Earnings Per Share [Abstract] Earnings Per Share Earnings Per Share, Basic Total Earnings Per Share, Basic [Abstract] Net income per share attributable to Ultralife common shareholders - basic: Earnings Per Share, Diluted Total Earnings Per Share, Diluted [Abstract] Net income per share attributable to Ultralife common shareholders - diluted: Earnings Per Share [Text Block] EARNINGS PER SHARE Effective Income Tax Rate Reconciliation, Percent Effective income tax rate (b/a) Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate changes on cash and cash equivalents Employee-related Liabilities, Current Accrued compensation and related benefits Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Weighted average period over which unrecognized stock option compensation cost will be recognized (in years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Unrecognized compensation cost related to restricted stock awards Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Unrecognized stock option compensation cost Entity Central Index Key Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Filer Category Entity Filer Category Entity Registrant Name Entity Registrant Name Equity [Abstract] Equity [Abstract] Extraordinary and Unusual Items [Abstract] Extraordinary and Unusual Items [Abstract] Extraordinary Item, Gain (Loss), Gross [Abstract] Extraordinary Item, Gain (Loss), Gross [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] FAIR VALUE OF FINANCIAL INSTRUMENTS Finite-Lived Intangible Assets, Accumulated Amortization Accumulated Amortization Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Gross Cost Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Net Net Furniture and Fixtures, Gross Furniture and fixtures Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Loss on long-lived asset disposals Gain on Business Interruption Insurance Recovery Gain on Business Interruption Insurance Recovery Goodwill Goodwill - ending Goodwill - beginning Goodwill Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Text Block] Goodwill, Intangible Assets and Long Term Assets Goodwill [Line Items] Goodwill [Line Items] Goodwill, Purchase Accounting Adjustments Acquisition of Accutronics Goodwill, Translation Adjustments Effect of foreign currency translation Gross Profit Gross profit Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income from continuing operations before income taxes (a) Income Statement [Abstract] Income Statement [Abstract] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Income Taxes Income Tax Expense (Benefit) Income tax provision (b) Total income tax provision Total income tax provision Income tax provision Tax provision Increase (Decrease) in Accounts Payable and Other Operating Liabilities Accounts payable and other liabilities Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Deferred Income Taxes Deferred income tax benefit Increase (Decrease) in Inventories Inventories Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Prepaid Expense Prepaid expenses and other assets Increase (Decrease) in Restricted Cash Change in restricted cash Increase (Decrease) in Security Deposits Return of security deposit Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Incremental shares included in EPS denominator due to share based payment arrangements Potential common shares Insurance Settlements Receivable Insurance Settlements Receivable Insurance Settlements Receivable, Current Due from insurance company Interest and Debt Expense Interest and financing expense Interest And Other Finance Costs Interest And Other Finance Costs Interest, financing and miscellaneous expense, net Interest Income, Deposits with Financial Institutions Interest income Inventory Adjustments Inventory Adjustments Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Inventory Disclosure [Text Block] Inventories Inventory, Finished Goods, Net of Reserves Finished products Inventory, Net Inventories, net Total Inventory, Net [Abstract] Inventory, Net [Abstract] Inventory, Raw Materials, Net of Reserves Raw materials Inventory, Work in Process, Net of Reserves Work in process Land Land Liabilities Total liabilities Liabilities and Equity Total liabilities and shareholders' equity Liabilities and Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities, Current Total current liabilities Liabilities, Current [Abstract] Current liabilities: Long-term Line of Credit Borrowings under credit facility Line of Credit Facility [Abstract] Line of Credit Facility [Abstract] Line of Credit Facility, Interest Rate at Period End Line of Credit Facility, Interest Rate at Period End Line Of Credit Facility Letter Of Credit Borrowing Capacity Line Of Credit Facility Letter Of Credit Borrowing Capacity Letter of credit sub-facility Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Line Of Credit Facility Maximum Borrowing Capacity May Be Increased To Line Of Credit Facility Maximum Borrowing Capacity May Be Increased To Line of Credit Maximum Borrowing Capacity may be increased in the last six months of the term Line of Credit Facility, Remaining Borrowing Capacity Line of Credit Facility, Remaining Borrowing Capacity Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Long-term Debt, Current Maturities Current portion of debt Loss Contingency, Damages Sought, Value Damages and unspecified amounts Machinery and Equipment, Gross Machinery and equipment Maximum [Member] Maximum Mergers, Acquisitions and Dispositions Disclosures [Text Block] Acquisition Stockholders' Equity Attributable to Noncontrolling Interest Non-controlling interest Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] Net Cash Provided by (Used in) Financing Activities Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] FINANCING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] INVESTING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] OPERATING ACTIVITIES: Net Income (Loss) Attributable to Parent Net income attributable to Ultralife Net income attributable to Ultralife Corporation Net Income (Loss) Attributable to Noncontrolling Interest Net loss attributable to non-controlling interest Non-Controlling interest New Accounting Pronouncements and Changes in Accounting Principles [Text Block] RECENT ACCOUNTING PRONOUNCEMENTS AND DEVELOPMENTS Note 9 Income Taxes Details [Abstract] Note 9 Income Taxes Details [Abstract] Note 9 - Income Taxes Details Number of Reportable Segments Number of operating segments Operating Expenses Total operating expenses Operating Expenses [Abstract] Operating expenses: Operating Income (Loss) Segment contribution Operating income Operating Loss Carryforwards Net operating loss carryforward Operating Loss Carryforwards Amount Recorded In Equity Upon Realization Operating Loss Carryforwards Amount Recorded In Equity Upon Realization Net operating loss carryforward for which a benefit will be recorded in capital when realized Operating Loss Carryforwards Domestic Operating Loss Carryforwards Domestic Net operating loss carryforward - domestic Operating Loss Carryforwards Foreign Operating Loss Carryforwards Foreign Net operating loss carryforward - foreign Other Assets, Noncurrent Security deposits and other non-current assets Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Other comprehensive (loss) income Foreign currency translation adjustments Other Income and Expenses [Abstract] Other (expense) income: Other Intangible Assets, Net Other intangible assets, net Other Liabilities, Current Accrued expenses and other current liabilities Other Liabilities, Noncurrent Other non-current liabilities Other Nonoperating Income (Expense) Miscellaneous Other Operating Income (Expense), Net Other Operating Income (Expense), Net, Total Patents [Member] Patents and Technology Payments for Repurchase of Common Stock Cash paid to repurchase treasury stock Payments to Acquire Businesses, Gross Aggregate purchase price paid for Acquisition Payments to Acquire Businesses, Net of Cash Acquired Acquisition of Accutronics, net of cash acquired Payments To Acquire Businesses Net Of Cash Acquired Working Capital Adjustment Payments To Acquire Businesses Net Of Cash Acquired Working Capital Adjustment Net working capital adjustment Payments to Acquire Property, Plant, and Equipment Cash paid for property, equipment and improvements Preferred Stock, Par or Stated Value Per Share Preferred stock - par value (in dollars per share) Preferred Stock, Shares Authorized Preferred stock - shares authorized Preferred Stock, Shares Issued Preferred stock - shares issued Preferred Stock, Shares Outstanding Preferred stock - shares outstanding Preferred Stock, Value, Issued Preferred stock Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Proceeds from Insurance Settlement, Operating Activities Proceeds from Insurance Settlement, Operating Activities Proceeds from Issuance of Common Stock Proceeds from stock option exercise Proceeds from Issuance of Debt Proceeds from debt borrowings Proceeds from Stock Options Exercised Cash received upon the exercise of stock options Product Warranty Accrual Accrued warranty obligations - ending Accrued warranty obligations - beginning Product Warranty Accrual, Payments Settlements made Product Warranty Accrual, Warranties Issued Accruals for warranties issued Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Property, Plant and Equipment Disclosure [Text Block] Property, Equipment and Improvements Property, Plant and Equipment, Gross Total Property, Plant and Equipment, Net Total Property, Plant and Equipment, Net [Abstract] Property, Plant and Equipment, Net [Abstract] Property, Plant and Equipment, Other, Gross Computer hardware and software Property, Plant, and Equipment, Owned, Net Property, equipment and improvements, net Property, Plant and Equipment [Table Text Block] Property, Equipment and Improvements Tables Range [Axis] Range [Axis] Range [Domain] Range [Domain] Research and Development Expense Research and development Research and Development Expense [Member] Research and development Restricted Cash and Cash Equivalents Restricted cash Restricted Stock or Unit Expense Restricted stock grants: Employee Restricted Stock [Member] Restricted Stock Retained Earnings (Accumulated Deficit) Accumulated deficit Revenues Revenues Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Tax Provision Components Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Effective Rates Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Intangible Assets Schedule of Goodwill [Table] Schedule of Goodwill [Table] Schedule of Goodwill [Table Text Block] Schedule of Goodwill Activity by Segment Schedule of Inventory, Current [Table Text Block] Inventories Tables Schedule of Product Warranty Liability [Table Text Block] Rollforward of Accrued Warranty Obligations Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table Text Block] Segment disclosure Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Stock Option Activity Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Option Assumptions Schedule Of Share Repurchase Programs [Line Items] Schedule Of Share Repurchase Programs [Line Items] Schedule Of Share Repurchase Programs [Line Items] Schedule Of Share Repurchase Programs [Table] Schedule Of Share Repurchase Programs [Table] Schedule Of Share Repurchase Programs [Table] Segments [Domain] Segments [Domain] Segment Reporting [Abstract] Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] BUSINESS SEGMENT INFORMATION Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Selling, General and Administrative Expense Selling, general and administrative Selling, General and Administrative Expenses [Member] Selling, general and administrative Share-based Compensation Stock-based compensation Stock compensation expense Share-based Compensation [Abstract] Share-based Compensation [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Dividends Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Weighted average expected life (years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Volatility factor Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Options Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Options exercisable - weighted average remaining contractual term (years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Options forfeited or expired Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Options granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Options outstanding - aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options outstanding Options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Options outstanding - weighted average exercise price Options outstanding - weighted average exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Options outstanding - weighted average remaining contractual term (years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Options exercisable - aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Options vested and expected to vest - weighted average exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term Options vested and expected to vest - weighted average remaining contractual term (years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Options vested and expected to vest - aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Options vested and expected to vest Equity Award [Domain] Equity Award [Domain] Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Options exercised - weighted average exercise price Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Options forfeited or expired - weighted average exercise price Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Options granted - weighted average exercise price Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price Options exercisable - weighted average exercise price Shareholders' Equity and Share-based Payments [Text Block] Shareholders' Equity Segments [Axis] Segments [Axis] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Stockholders' Equity Attributable to Parent Total Ultralife Corporation equity Stockholders' Equity Attributable to Parent [Abstract] Shareholders' equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total shareholders' equity Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Stockholders' Equity Note Disclosure [Text Block] Share Repurchase Program Stock Issued During Period, Shares, Restricted Stock Award, Gross Shares of restricted stock awarded to certain employees Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Options exercised Stock or Unit Option Plan Expense Stock options Stock Repurchase Program, Number of Shares Authorized to be Repurchased Stock repurchase plan - shares authorized to be repurchased Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Balance - shares authorized to be repurchased Subsegments [Axis] Subsegments [Axis] Subsegments [Domain] Subsegments [Domain] Tax Credit Carryforward, Amount Tax credit carryforwards Trademarks [Member] Trademarks Trade Names [Member] Trade Name Trading Symbol Trading Symbol Treasury Stock, Carrying Basis Treasury stock, at cost Treasury Stock, Shares Treasury stock - shares Treasury Stock, Shares, Acquired Shares repurchased Treasury Stock, Value, Acquired, Cost Method Cost of shares repurchased Unrecognized Tax Benefits Unrecognized tax benefits to uncertain tax positions Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities Unrecognized tax benefits related to settlement of examinations Unrecorded Unconditional Purchase Obligation Unrecorded Unconditional Purchase Obligation Weighted Average Number of Shares Outstanding, Diluted Weighted average shares outstanding - diluted Weighted Average Number of Shares Outstanding, Basic Weighted average shares outstanding - basic