Ultralife (ULBI) 10-K 4 Feb 21 2020 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 01, 2021	Jun. 30, 2020
Document Information [Line Items]
Entity Central Index Key	0000875657
Entity Registrant Name	Ultralife Corp
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	0-20852
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	2000 Technology Parkway
Entity Address, City or Town	Newark
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	14513
Entity Tax Identification Number	16-1387013
City Area Code	315
Local Phone Number	332-7100
Title of 12(b) Security	Common Stock, $0.10 par value per share
Trading Symbol	ULBI
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 68,675,435
Entity Common Stock, Shares Outstanding		15,959,984

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current Assets:
Cash	$ 10,653	$ 7,405
Trade accounts receivable, net of allowance for doubtful accounts of $317 and $324, respectively	21,054	30,106
Inventories, net	28,193	29,759
Prepaid expenses and other current assets	4,596	3,103
Total current assets	64,496	70,373
Property, plant and equipment, net	22,850	22,525
Goodwill	27,018	26,753
Other intangible assets, net	9,209	9,721
Deferred income taxes, net	11,836	13,222
Other noncurrent assets	2,292	1,963
Total assets	137,701	144,557
Current Liabilities:
Accounts payable	10,839	9,388
Current portion of long-term debt, net	1,361	1,372
Accrued compensation and related benefits	1,748	1,655
Accrued expenses and other current liabilities	4,758	4,775
Total current liabilities	18,706	17,190
Long-term debt	0	15,780
Deferred income taxes	515	559
Other noncurrent liabilities	1,557	1,278
Total liabilities	20,778	34,807
Commitments and contingencies (Note 6)
Shareholders' Equity:
Preferred stock – par value $.10 per share; authorized 1,000,000 shares; none issued	0	0
Common stock – par value $.10 per share; authorized 40,000,000 shares; issued – 20,373,519 shares and 20,268,050 shares, respectively; outstanding – 15,959,984 shares and 15,866,868 shares, respectively	2,037	2,026
Capital in excess of par value	185,464	184,292
Accumulated deficit	(47,598)	(52,830)
Accumulated other comprehensive loss	(1,782)	(2,531)
Treasury stock - at cost; 4,413,535 shares and 4,401,182 shares, respectively	(21,321)	(21,231)
Total Ultralife Corporation equity	116,800	109,726
Non-controlling interest	123	24
Total shareholders’ equity	116,923	109,750
Total liabilities and shareholders' equity	$ 137,701	$ 144,557

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Trade accounts receivable, allowance for doubtful accounts	$ 317	$ 324
Preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	40,000,000	40,000,000
Common stock, shares issued (in shares)	20,373,519	20,268,050
Common stock, shares outstanding (in shares)	15,959,984	15,866,868
Treasury stock, shares (in shares)	4,413,535	4,401,182

Consolidated Statements of Inco

Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Revenue	[1]	$ 107,712	$ 106,795
Cost of products sold		78,553	75,630
Gross profit		29,159	31,165
Operating expenses:
Research and development		5,947	6,805
Selling, general and administrative		17,511	16,992
Total operating expenses		23,458	23,797
Operating income		5,701	7,368
Other (income) expense:
Gain on litigation settlement		(1,593)	0
Interest and financing expense		436	539
Miscellaneous		(165)	58
Total other (income) expense		(1,322)	597
Income Before Income Taxes		7,023	6,771
Income tax provision		1,692	1,457
Net income		5,331	5,314
Net income attributable to non-controlling interest		99	109
Net income attributable to Ultralife Corporation		5,232	5,205
Other comprehensive income:
Foreign currency translation adjustments		749	255
Comprehensive income attributable to Ultralife Corporation		$ 5,981	$ 5,460
Net income per share attributable to Ultralife Corporation common shareholders – Basic (in dollars per share)		$ 33	$ 33
Net income per share attributable to Ultralife Corporation common shareholders – Diluted (in dollars per share)		$ 33	$ 32
Weighted average shares outstanding – Basic (in shares)		15,902	15,783
Weighted average shares outstanding – Diluted (in shares)		16,096	16,179
[1]	Sales classified to U.S. include shipments to U.S.-based prime contractors which in some cases may serve non-U.S. projects.

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2018	20,053,335
Balance at Dec. 31, 2018	$ 2,005	$ 182,630	$ (2,786)	$ (58,035)	$ (19,266)	$ (85)	$ 104,463
Net income				5,205		109	5,314
Share repurchases					(1,957)		$ (1,957)
Stock option exercises (in shares)	208,881						208,881
Stock option exercises	$ 21	909					$ 930
Stock-based compensation -stock options		623					623
Stock-based compensation -restricted stock		130
Vesting of restricted stock (in shares)	5,834
Vesting of restricted stock					(8)		(8)
Foreign currency translation adjustments			255				$ 255
Balance (in shares) at Dec. 31, 2019	20,268,050						15,866,868
Balance at Dec. 31, 2019	$ 2,026	184,292	(2,531)	(52,830)	(21,231)	24	$ 109,750
Net income				5,232		99	$ 5,331
Stock option exercises (in shares)	92,968						355,797
Stock option exercises	$ 9	229					$ 163
Stock-based compensation -stock options		838					838
Stock-based compensation -restricted stock		105					105
Vesting of restricted stock (in shares)	12,501
Foreign currency translation adjustments			749				749
Vesting of restricted stock	$ 2				(15)		$ (13)
Balance (in shares) at Dec. 31, 2020	20,373,519						15,959,984
Balance at Dec. 31, 2020	$ 2,037	$ 185,464	$ (1,782)	$ (47,598)	$ (21,321)	$ 123	$ 116,923

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
OPERATING ACTIVITIES:
Net income	$ 5,331	$ 5,314
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation	2,340	2,220
Amortization of intangible assets	595	525
Amortization of financing fees	51	44
Stock-based compensation	943	753
Deferred income tax expense	1,386	1,211
Gain on litigation settlement	(1,593)	0
Changes in operating assets and liabilities:
Accounts receivable	9,211	(10,416)
Inventories, gross	1,147	(3,319)
Inventory reserves	652	1,123
Prepaid expenses and other assets	(134)	(1,575)
Income taxes receivable and payable	139	25
Accounts payable and other liabilities	1,652	1,125
Net cash provided by (used in) operating activities	21,720	(2,970)
INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(3,101)	(6,281)
Proceeds from sale of equipment	120	0
Purchase of SWE, net of cash acquired	0	(25,248)
Net cash used in investing activities	(2,981)	(31,529)
FINANCING ACTIVITIES:
Repayment of revolving credit facility	(10,182)	0
Repayment of term loan facility	(5,660)	(866)
Proceeds from exercise of stock options	238	930
Tax withholdings on stock-based awards	(90)	(8)
Proceeds from revolving credit facility	0	10,182
Proceeds from term loan facility	0	8,000
Repurchase of common stock	0	(1,957)
Payment of debt issuance costs	0	(157)
Net cash (used in) provided by financing activities	(15,694)	16,124
Effect of exchange rate changes on cash	203	(154)
INCREASE (DECREASE) IN CASH	3,248	(18,529)
Cash - Beginning of year	7,405	25,934
Cash - End of year	10,653	7,405
Supplemental cash flow information:
Construction in process in accounts payable	675	74
Income taxes paid	264	266
Interest paid	375	576
Paycheck Protection Program CARES Act [Member]
FINANCING ACTIVITIES:
Proceeds from Paycheck Protection Program loan	3,459	0
Repayment of Paycheck Protection Program loan	$ (3,459)	$ 0

Note 1 - Summary of Operations

Note 1 - Summary of Operations and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Business Description and Accounting Policies [Text Block]	Note 1 a. Description of Business As used in this annual report, unless otherwise indicated, the terms “we”, “our” and “us” refer to Ultralife Corporation (“Ultralife”) and includes our wholly-owned subsidiaries, ABLE New Energy Co., Limited and its wholly-owned subsidiary ABLE New Energy Co.; Ltd; Ultralife UK LTD and its wholly-owned subsidiary, Accutronics Ltd; Ultralife Batteries (UK) Ltd.; Southwest Electronic Energy Corporation and its wholly-owned subsidiary, CLB, INC.; and our majority-owned joint venture Ultralife Batteries India Private Limited. We offer products and services ranging from power solutions to communications and electronics systems. Through our engineering and collaborative approach to problem solving, we serve government, defense and commercial customers across the globe. We design, manufacture, install and maintain power and communications systems including: rechargeable and non-rechargeable batteries, charging systems, communications and electronics systems and accessories, and custom engineered systems. We sell our products worldwide through a variety of trade channels, including original equipment manufacturers (“OEMs”), industrial and defense supply distributors, and directly to U.S. and international defense departments. b. Principles of Consolidation The consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and include the accounts of Ultralife Corporation, our wholly-owned subsidiaries, Ultralife Batteries (UK) Ltd., Ultralife UK LTD, and its wholly-owned subsidiary Accutronics Ltd, ABLE New Energy Co., Limited and its wholly-owned subsidiary ABLE New Energy Co., Ltd. (“ABLE” collectively), Southwest Electronic Energy Corporation and its wholly-owned subsidiary, CLB, INC. (“SWE” collectively), and our majority-owned subsidiary Ultralife Batteries India Private Limited (“India JV”). Intercompany accounts and transactions have been eliminated in consolidation. c. Management's Use of Judgment and Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at year end and the reported amounts of revenues and expenses during the reporting period. Key areas affected by estimates include: (a) carrying value of goodwill and intangible assets; (b) reserves for excess and obsolete inventory, deferred tax assets, warranties, and bad debts; (c) valuation of assets acquired and liabilities assumed in business combinations; (d) various expense accruals; and (e) stock-based compensation. Our actual results could differ from these estimates. d. Reclassifications Certain items previously reported in specific financial statement captions are reclassified to conform to the current presentation. There were no December 31, 2020 2019. e . Cash Our cash balances may not not f. Accounts Receivable and Allowance for Doubtful Accounts We extend credit to our customers in the normal course of business. We perform ongoing credit evaluations and generally do not 30 g. Inventories Inventories are stated at the lower of cost or net realizable value with cost determined under the firstin, firstout (FIFO) method. We record provisions for excess, obsolete or slow-moving inventory based on changes in customer demand, technology developments or other economic factors. h. Property, Plant and Equipment Property, plant and equipment are stated at cost. Depreciation and amortization are computed using the straight-line method over the estimated useful lives. Estimated useful lives are as follows (in years): Buildings 10 – 40 Machinery and Equipment 5 – 10 Furniture and Fixtures 3 – 10 Computer Hardware and Software 3 – 5 Leasehold Improvements Lesser of useful life or lease term Betterments, renewals and extraordinary repairs that extend the life of the assets are capitalized. Other repairs and maintenance costs are expensed when incurred. When disposed, the cost and accumulated depreciation applicable to assets retired are removed from the accounts and the gain or loss on disposition is recognized in operating income. i. Long-Lived Assets, Goodwill and Intangibles We assess our long-lived assets for impairment whenever events or circumstances indicate that their carrying amounts may not no Under the acquisition method of accounting, the purchase price paid, or the total consideration transferred, to consummate the acquisition is allocated to the identified tangible and intangible assets acquired and liabilities assumed based on their respective estimated fair values as of the acquisition date with the residual amount recorded to goodwill. We do not may The annual impairment test for goodwill consists of a comparison of the estimated fair value for each reporting unit to which goodwill is assigned to the carrying value of the respective reporting unit. The annual impairment test for other indefinite-lived intangible assets consists of a comparison of the estimated fair value of each asset to the carrying value of the respective asset. If the estimated fair value of a reporting unit or other indefinite-lived intangible asset exceeds its respective carrying value, the goodwill or indefinite-lived intangible asset is considered not j. Translation of Foreign Currency The financial statements of our foreign subsidiaries are translated from the functional currency into U.S. dollar equivalents, with translation adjustments recorded as the sole component of accumulated other comprehensive income (loss). Exchange gains and losses related to foreign currency transactions and balances denominated in currencies other than the functional currency are recognized in net income. k. Revenue Recognition Revenues are generated from the sale of products. Performance obligations are met and revenue is recognized upon transfer of control to the customer, which is generally upon shipment. When contract terms require transfer of control upon delivery at a customer’s location, revenue is recognized on the date of delivery. For products shipped under vendor managed inventory arrangements, revenue is recognized and billed when the product is consumed by the customer, at which point control has transferred and there are no not Revenues recognized from prior period performance obligations for the years ended December 31, 2020 2019 not As of December 31, 2020 2019, no one 606, Deferred revenue, unbilled revenue and deferred contract costs recorded on our consolidated balance sheets as of December 31, 2020 2019 not l. Warranty Reserves We generally offer standard warranties against product defects. We do not m. Shipping and Handling Costs Costs incurred by us related to shipping and handling are included in cost of products sold. Amounts charged to customers pertaining to these costs are reflected as revenue. n. Sales Commissions Sales commissions are expensed as incurred for contracts with an expected duration of one no December 31, 2020 2019. o. Research and Development Research and development expenditures are charged to operations as incurred. The majority of research and development expenses pertain to salaries and benefits, developmental supplies, depreciation and other contracted services. For the years ended December 31, 2020 2019, p. Environmental Costs Environmental expenditures that relate to current operations are expensed. Remediation costs that relate to an existing condition caused by past operations are accrued when it is probable that these costs will be incurred and can be reasonably estimated. q. Income Taxes We account for income taxes using the asset and liability method. Under this method, deferred tax assets and liabilities are determined based on differences between financial reporting and tax basis of assets and liabilities and are measured using the enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. Pursuant to ASC 740, not not, r. Concentration Related to Customers and Suppliers We have two customers, both large defense primary contractors, which comprised 17% and 6% of our total revenues in 2020, 2019, 2020 2019 no 10% Currently, we do not We generally do not 2020 2019, not Certain materials and components used in our products are available only from a single or a limited number of suppliers. As such, some materials and components could become in short supply resulting in limited availability and/or increased costs. Additionally, we may s. Fair Value Measurements and Disclosures Fair value is defined as the price that would be received for an asset or the exit price that would be paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. Fair value is estimated by applying the following hierarchy, which prioritizes the inputs used to measure fair value into three Level 1: Quoted prices in active markets for identical assets or liabilities. Level 2: Observable inputs, other than Level 1 not Level 3: Unobservable inputs supported by little or no The fair value of financial instruments approximated their carrying values at December 31, 2020 2019. t. Earnings Per Share Basic earnings per share (“EPS”) is computed by dividing net income attributable to Ultralife Corporation by the weighted average shares of common stock outstanding for the period. Diluted EPS reflects the assumed exercise and conversion of dilutive outstanding stock options and unvested restricted stock, if any, applying the treasury stock method. For the year ended December 31, 2020, December 31, 2020 For the year ended December 31, 2019, December 31, 2019 u. Stock-Based Compensation We have various stock-based employee compensation plans that are described more fully in Note 7. v. Segment Reporting We have two operating segments – Battery & Energy Products, and Communications Systems. The basis for determining our operating segments is the manner in which financial information is used in monitoring our operations. Management operates and organizes itself according to business units that comprise unique products and services across geographic locations. w. Leases At contract inception, the Company determines whether the arrangement is or contains a lease and determines the lease classification. The lease term is determined based on the non-cancellable term of the lease adjusted to the extent optional renewal terms and termination rights are reasonably certain. Lease expense is recognized evenly over the lease term. Variable lease payments are recognized as period costs. The present value of remaining lease payments is recognized as a liability on the balance sheet with a corresponding right-of-use asset adjusted for prepaid or accrued lease payments. The Company uses its incremental borrowing rate for the discount rate, unless the interest rate implicit in the lease contract is readily determinable. The Company has adopted the practical expedients to not not 9 x. Recent Accounting Pronouncements Recently Adopted Accounting Guidance Effective January 1, 2020, 2017 04, 350 two not Recent Accounting Guidance Not In June 2016, 2016 13, 326 December 15, 2022. In December 2019, 2019 12, 740 2019 12 740 2019 12 December 15, 2020. not 2019 12

Note 2 - Acquisition

Note 2 - Acquisition	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Business Combination Disclosure [Text Block]	Note 2 On May 1, 2019, SWE is a leading independent designer and manufacturer of high-performance smart battery systems and battery packs to customer specifications using lithium cells. SWE serves a variety of industrial markets, including oil and gas, remote monitoring, process control and marine, which demand uncompromised safety, service, reliability and quality. The Company acquired SWE as a bolt-on acquisition to further support our strategy of commercial revenue diversification by providing entry to the oil and gas exploration and production, and subsea electrification markets, which were previously unserved by Ultralife. Another key benefit of the acquisition includes obtaining a highly valuable technical team of battery pack and charger system engineers and technicians to add to our new product development-based revenue growth initiatives in our commercial end-markets particularly asset tracking, smart metering and other industrial applications. The acquisition of SWE was completed pursuant to a Stock Purchase Agreement dated May 1, 2019 ( The aggregate purchase price for the acquisition was funded by the Company through a combination of cash on hand and borrowings under the Credit Facilities (see Note 3 The purchase price allocation was determined in accordance with the accounting treatment of a business combination pursuant to FASB ASC Topic 805, 805” The allocation of the purchase price to the assets acquired and liabilities assumed at the date of the acquisition is presented in the table below. Management is responsible for determining the fair value of the tangible and intangible assets acquired and liabilities assumed as of the date of acquisition. Management considered several factors, including reference to an analysis performed under ASC 805 not may Cash $ 942 Accounts receivable 3,621 Inventories 4,685 Other current assets 431 Property, plant and equipment 9,177 Goodwill 6,534 Customer relationships 2,522 Trade name 1,127 Accounts payable (1,060 ) Other current liabilities (778 ) Deferred tax liability, net (1,011 ) Net assets acquired $ 26,190 The goodwill included in the Company’s purchase price allocation presented above represents the value of SWE’s assembled and trained workforce, the incremental value that SWE engineering and technology will bring to the Company and the revenue growth which is expected to occur over time which is attributable to increased market penetration from future new products and customers. The goodwill acquired in connection with the acquisition is not The operating results and cash flows of SWE are reflected in the Company’s consolidated financial statements from the date of acquisition. SWE is included in the Battery & Energy Products segment. For the year ended December 31, 2020, For the year ended December 31, 2019, May 1, 2019 During the year ended December 31, 2019, one The following supplemental pro forma information presents the combined results of operations, inclusive of the purchase accounting adjustments and one January 1, 2018, The supplemental pro forma results do not not not Set forth below are the unaudited supplemental pro forma results of the Company and SWE for the years ended December 31, 2020 2019 January 1, 2018. Year Ended December 31, 2020 2019 Revenue $ 107,712 $ 115,590 Operating income 5,701 8,008 Net Income attributable to Ultralife Corporation 5,232 5,526 Net income per share attributable to Ultralife Corporation: Basic $ 0.33 $ 0.35 Diluted $ 0.33 $ 0.34

Note 3 - Debt

Note 3 - Debt	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Debt Disclosure [Text Block]	Note 3 Credit Facilities On May 1, 2019, May 31, 2017 ( The Amended Credit Agreement, among other things, provided for a five May 31, 2022. six May 31, 2022, may Upon closing of the SWE acquisition on May 1, 2019, December 31, 2020, no December 31, 2020, The Company is required to repay the borrowings under the Term Loan Facility in sixty 60 May 31, 2019, April 30, 2024. May 31, 2022. may December 31, 2020. In addition to the customary affirmative and negative covenants, the Company must maintain a consolidated fixed charge coverage ratio of equal to or greater than 1.15 to 1.0, 1.0, December 31, 2020. Borrowings under the Credit Facilities are secured by substantially all the assets of the Company. Availability under the Revolving Credit Facility is subject to certain borrowing base limits based on receivables and inventories. Interest accrues on outstanding indebtedness under the Credit Facilities at the Base Rate or the Overnight LIBOR Rate, as selected by the Company, plus the applicable margin. The Base Rate is the higher of (a) the Prime Rate, (b) the Federal Funds Effective Rate plus 50 basis points, and (c) the Overnight LIBOR Rate plus one hundred zero The Company must pay a fee of 0.1% to 0.2% based on the average daily unused availability under the Revolving Credit Facility. Payments must be made by the Company to the extent borrowings exceed the maximum amount then permitted to be drawn on the Credit Facilities and from the proceeds of certain transactions. Upon the occurrence of an event of default, the outstanding obligations may

Note 4 - Share Repurchase Progr

Note 4 - Share Repurchase Program	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	Note 4 On October 31, 2018, November 1, 2018 not twelve October 31, 2019. From the inception of the Share Repurchase Program on November 1, 2018 October 31, 2019, 2018, 2019, There were no December 31, 2020.

Note 5 - Supplemental Balance S

Note 5 - Supplemental Balance Sheet Information	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Supplemental Balance Sheet Disclosures [Text Block]	Note 5 a. Cash and Restricted Cash The Company had cash and restricted cash totaling $10,653 and $7,405 as of December 31, 2020 2019, December 31, 2020 2019 Cash $ 10,562 $ 7,135 Restricted cash 91 270 Total $ 10,653 $ 7,405 As of December 31, 2020 December 31, 2019, third December 31, 2019, December 31, 2020, b. Inventory, Net Inventories are stated at the lower of cost or net realizable value with cost determined under the first first December 31, 2020 2019 Raw materials $ 17,277 $ 18,485 Work in process 3,411 2,548 Finished products 7,505 8,726 Total $ 28,193 $ 29,759 c. Property, Plant and Equipment Major classes of property, plant and equipment consisted of the following: December 31, 2020 2019 Land $ 1,273 $ 1,273 Buildings and leasehold improvements 15,393 15,386 Machinery and equipment 61,048 55,058 Furniture and fixtures 2,235 2,194 Computer hardware and software 6,894 6,712 Construction in progress 1,227 4,730 88,070 85,353 Less – Accumulated depreciation (65,220 ) (62,828 ) Total $ 22,850 $ 22,525 Depreciation expense was $2,340 and $2,220 for the years ended December 31, 2020 2019, d. Goodwill and Other Intangible Assets The Company conducted its annual impairment test for goodwill and other indefinite-lived intangible assets as of October 1, 2020. four December 31, 2020, The following table summarizes the goodwill activity by segment for the years ended December 31, 2020 2019: Battery & Communications Systems Total Balance – January 1, 2019 $ 8,616 $ 11,493 $ 20,109 Acquisition of SWE 6,534 - 6,534 Effect of foreign currency translation 110 - 110 Balance – December 31, 2019 15,260 11,493 26,753 Effect of foreign currency translation 265 - 265 Balance – December 31, 2020 $ 15,525 $ 11,493 $ 27,018 The composition of intangible assets was: December 31, 2020, Cost Accumulated amortization Net Trademarks $ 3,410 $ - $ 3,410 Customer relationships 9,171 5,115 4,056 Patents and technology 5,557 5,014 543 Distributor relationships 377 377 0 Trade name 1,524 324 1,200 Total other intangible assets $ 20,039 $ 10,830 $ 9,209 December 31, 2019, Cost Accumulated amortization Net Trademarks $ 3,403 $ - $ 3,403 Customer relationships 9,080 4,721 4,359 Patents and technology 5,521 4,869 652 Distributor relationships 377 377 - Trade name 1,511 204 1,307 Total other intangible assets $ 19,892 $ 10,171 $ 9,721 The change in the cost value of other intangible assets is a result of foreign currency translation effects. Amortization of other intangible assets was included in the following financial statement captions: Year ended December 31, 2020 2019 Research and development expense $ 124 $ 130 Selling, general and administrative expense 471 395 Total $ 595 $ 525 Future amortization expense of amortizable intangible assets will be approximately $352, $337, $334, $324 and $324 for the five December 31, 2021 2025,

Note 6 - Commitments and Contin

Note 6 - Commitments and Contingencies	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	Note 6 a. Legal Matters On December 14, 2020, 13 02420 no December 31, 2020. December 31, 2020. We are subject to legal proceedings and claims that arise from time to time in the normal course of business. We believe that the final disposition of any such matters will not not b. Indemnity Our organizational documents provide that our directors or officers will be reimbursed for all expenses, to the fullest extent permitted by law arising out of their performance. c. Purchase Commitments As of December 31, 2020, d. China Our operating facility in China presents risks including, but not 9 e. Employment Contracts We have an employment contract with Michael D. Popielec, our President and Chief Executive Officer, which remains in effect until terminated by either party. This agreement provides for a base salary, as adjusted for increases at the discretion of our Board of Directors, and includes incentive bonuses based upon attainment of specified quantitative and qualitative performance goals. This agreement also provides for severance payments in the event of specified events of termination of employment. In addition, this agreement provides for a lump sum payment in the event of termination of employment in connection with a change in control. As part of our employment commencement process, employees are required to enter into agreements providing for confidentiality of certain information and the assignment of rights to inventions made by them while employed by us. These agreements also contain certain non-competition and non-solicitation provisions effective during the employment term and for varying periods thereafter depending on position and location. There can be no f. Product Warranties We estimate future warranty costs to be incurred for product failure rates, material usage and service costs in the development of our warranty obligations. Estimated future costs are based on actual past experience and are generally estimated as a percentage of sales over the warranty period. Changes in our product warranty liability during the years ended December 31, 2020 2019 2020 2019 Balance, January 1 $ 195 $ 95 Assumed warranty obligations – SWE - 145 Provision for warranties issued 200 114 Settlements made (246 ) (159 ) Balance, December 31 $ 149 $ 195

Note 7 - Shareholders' Equity

Note 7 - Shareholders' Equity	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Shareholders' Equity and Share-based Payments [Text Block]	Note 7 We recorded non-cash stock compensation expense in each period as follows: Year ended December 31, 2020 2019 Stock options $ 838 $ 623 Restricted stock 105 130 Total $ 943 $ 753 These are more fully discussed as follows: We have various stock-based employee compensation plans, for which compensation cost is recognized in the financial statements. The cost is measured at the grant date, based on the estimated fair value of the award, and is recognized as an expense over the employee’s requisite service period (generally the vesting period of the equity award). Our shareholders have approved various equity-based plans that permit the grant of stock options, restricted stock and other equity-based awards. In addition, our shareholders have approved the grant of stock options outside of these plans. In June 2004, 2004 “2004 2006, 2008, 2011, 2013, 2004 In June 2014, 2014 “2014 2004 June 10, 2014. 2014 2014 no may 2014 may June 2, 2024. Stock options granted under the LTIPs are either Incentive Stock Options (“ISOs”) or Non-Qualified Stock Options (“NQSOs”). Key employees are eligible to receive ISOs and NQSOs; however, directors and consultants are eligible to receive only NQSOs. Most ISOs vest over a three seventh December 31, 2020, 2014 2004 On December 30, 2010, 2004 four December 30, 2011; ( four December 30, 2011; ( 15 30 four 15 30 four 2004 June 7, 2011. All such options in items (i) and (ii) were due to expire on December 30, 2017. April 19, 2017, December 30, 2020. November 23, 2020, All such options in items (iii) and (iv) were due to expire as of the later of December 30, 2017 five no December 30, 2020. July 25, 2018, first 30 third 2018. December 30, 2020. As of December 31, 2020, We use the Black-Scholes option-pricing model to estimate fair value of stock-based awards. The following weighted average assumptions were used to value options granted during the years ended December 31, 2020 2019: Year ended December 31, 2020 2019 Risk-free interest rate 0.4 % 1.8 % Volatility factor 49 % 48 % Weighted average expected life (years) 5.3 5.3 Forfeiture rate 10.0 % 10.0 % Dividends 0.0 % 0.0 % We used a Monte Carlo simulation option-pricing model to estimate the fair value of market performance stock-based awards, of which there were no December 31, 2020 2019. We calculate expected volatility for stock options by taking an average of historical volatility over the expected term. The computation of expected term was determined based on historical experience of similar awards, giving consideration to the contractual terms of the stock-based awards and vesting schedules. The interest rate for periods within the contractual life of the award is based on the U.S. Treasury yield in effect at the time of grant. Forfeiture rates are calculated by dividing unvested shares forfeited by beginning shares outstanding. The pre-vesting forfeiture rate is calculated yearly and is determined using a historical twelve The following tables summarize data for the stock options issued by us: Year ended December 31, 2020 Number of shares Weighted average exercise price per share Weighted average remaining contractual term Aggregate intrinsic value Shares under option – January 1 1,541,792 $ 6.88 Options granted 256,000 6.51 Options exercised (355,797 ) 6.08 Options forfeited or expired (224,332 ) 9.76 Shares under option – December 31 1,217,163 $ 6.50 3.97 $ 1,034 Vested and expected to vest - December 31 1,115,705 $ 6.39 3.81 $ 1,034 Options exercisable – December 31 738,452 $ 5.82 2.79 $ 1,034 Year ended December 31, 2019 Number of shares Weighted average exercise price per share Shares under option – January 1 1,576,087 $ 6.58 Options granted 282,500 8.27 Options exercised (208,881 ) 4.45 Options forfeited or expired (107,914 ) 10.93 Shares under option – December 31 1,541,792 $ 6.88 Options exercisable – December 31 1,083,581 $ 6.28 The following table represents additional information about stock options outstanding at December 31, 2020: Option outstanding Options exercisable Range of exercise prices Number of outstanding options Weighted- average remaining contractual life Weighted- average exercise price Number of options exercisable Weighted- average exercise price $3.71 - $3.94 204,244 0.81 $ 3.80 204,244 $ 3.80 $4.29 - $5.71 317,667 2.78 4.93 317,667 4.93 $6.24 - $7.16 267,333 6.13 6.54 13,667 6.87 $8.25 - $9.96 427,919 5.01 8.92 202,874 9.19 $3.71 - $9.96 1,217,163 3.97 $ 6.50 738,452 $ 5.82 The weighted average fair value of options granted during the years ended December 31, 2020 2019 December 31, 2020 2019 Cash received from stock option exercises under our stock-based compensation plans for the years ended December 31, 2020 2019 In October 2020, April 2019, January 2018, three December 31, 2020, There were 249,604 shares of common stock available for future issuance under equity compensation plans as of December 31, 2020.

Note 8 - Income Taxes

Note 8 - Income Taxes	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Income Tax Disclosure [Text Block]	Note 8 For the years ended December 31, 2020 2019, Year ended December 31, 2020 2019 Current: State $ 23 $ 43 Foreign 283 203 306 246 Deferred: Federal 1,673 1,236 Foreign (287 ) (25 ) 1,386 1,211 Total income tax provision $ 1,692 $ 1,457 Deferred income taxes reflect the net tax effect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amount used for income tax purposes. Significant components of our deferred tax assets and liabilities are as follows: December 31, 2020 2019 Deferred tax assets: Net operating loss carryforwards 12,481 14,579 Tax credit carryforwards 2,070 1,907 Intangible assets 1,352 1,283 Accrued expenses, reserves and other 2,176 2,265 Research and development 984 - Total deferred tax assets 19,063 20,034 Valuation allowance for deferred tax assets (1,942 ) (1,942 ) Net deferred tax assets 17,121 18,092 Deferred tax liabilities: Property, plant and equipment (262 ) (342 ) Intangible assets (5,538 ) (5,087 ) Total deferred tax liabilities (5,800 ) (5,429 ) Net deferred tax assets $ 11,321 $ 12,663 Net deferred tax assets (liabilities) are comprised of the following balance sheet amounts: December 31, 2020 2019 Deferred tax assets $ 11,836 $ 13,222 Deferred tax liabilities (515 ) (559 ) $ 11,321 $ 12,663 For financial reporting purposes, income from continuing operations before income taxes is as follows: Year ended December 31, 2020 2019 United States $ 6,586 $ 5,992 Foreign 437 779 $ 7,023 $ 6,771 The provision for income taxes differs from the amount of income tax determined by applying the applicable U.S. statutory federal income tax rate to income from continuing operations before income taxes as follows: Year ended December 31, 2020 2019 Statutory income tax rate 21 % 21 % Increase (decrease) in tax provision resulting from: Equity compensation 4.5 (0.4 ) Income tax credits (2.3 ) (0.4 ) Foreign tax rates 0.1 (0.5 ) Other 0.8 1.8 Effective income tax rate 24.1 % 21.5 % As of December 31, 2020, not 2015 2021 2035, 2028 2039. December 31, 2020, As of December 31, 2020, may no As of December 31, 2020, not There were no December 31, 2020 2019. As of December 31, 2020, As a result of our operations, we file income tax returns in various jurisdictions including U.S. federal, U.S. state and foreign jurisdictions. We are routinely subject to examination by taxing authorities in these various jurisdictions. In August 2020, 2016 2018 no 2019 2001, 2002, 2005 2007 2011 2015 2001, 2002, 2005 2007 2011 2019 2010 2019

Note 9 - Operating Leases

Note 9 - Operating Leases	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Lessee, Operating Leases [Text Block]	Note 9 The Company has operating leases predominantly for operating facilities. As of December 31, 2020, one four not not no no The components of lease expense for the current and prior-year comparative periods were as follows: Year ended December 31, 2020 2019 Operating lease cost $ 703 $ 628 Variable lease cost 75 84 Total lease cost $ 778 $ 712 Supplemental cash flow information related to leases was as follows: Year ended December 31, 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 688 $ 611 Right-of-use assets obtained in exchange for lease liabilities: $ 875 $ 1,586 Supplemental balance sheet information related to leases was as follows: December 31, Balance Sheet Classification 2020 2019 Assets: Operating lease right-of-use asset Other noncurrent assets $ 2,189 $ 1,866 Liabilities: Current operating lease liability Accrued expenses and other current liabilities $ 680 $ 620 Operating lease liability, net of current portion Other noncurrent liabilities 1,524 1,247 Total operating lease liability $ 2,204 $ 1,867 Weighted-average remaining lease term (years) 3.3 3.7 Weighted-average discount rate 4.5 % 4.5 % Future minimum lease payments as of December 31, 2020 Maturity of Operating Lease Liabilities 2021 $ 724 2022 693 2023 713 2024 275 Thereafter - Total lease payments $ 2,405 Less: Imputed interest (201 ) Present value of remaining lease payments $ 2,204

Note 10 - 401(k) Retirement Ben

Note 10 - 401(k) Retirement Benefit Plan	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Retirement Benefits [Text Block]	Note 10 401 We maintain a defined contribution 401 401 may, December 31, 2020 2019, first 2020 2019, 401

Note 11 - Business Segment Info

Note 11 - Business Segment Information	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	Note 11 We report our results in two 9 2020: Battery & Energy Products Communications Systems Corporate Total Revenue $ 91,907 $ 15,805 $ - $ 107,712 Segment contribution 23,400 5,759 (23,458 ) 5,701 Other income (1,322 ) (1,322 ) Income tax expense 1,692 1,692 Non-controlling interest 99 99 Net income attributable to Ultralife $ 5,232 Total assets $ 85,112 $ 26,425 $ 26,164 $ 137,701 Capital expenditures $ 3,031 $ - $ 70 $ 3,101 Goodwill $ 15,525 $ 11,493 - $ 27,018 Depreciation and amortization of intangible assets $ 2,269 $ 342 $ 324 $ 2,935 Stock-based compensation $ 446 $ 155 $ 342 $ 943 2019: Battery & Communications Corporate Total Revenue $ 83,996 $ 22,799 $ - $ 106,795 Segment contribution 22,813 8,352 (23,797 ) 7,368 Other expense 597 597 Income tax expense 1,457 1,457 Non-controlling interest 109 109 Net income attributable to Ultralife $ 5,205 Total assets $ 79,413 $ 40,458 $ 24,686 $ 144,557 Capital expenditures $ 5,805 $ 44 $ 432 $ 6,281 Goodwill $ 15,260 $ 11,493 - $ 26,753 Depreciation and amortization of intangible assets $ 2,104 $ 364 $ 277 $ 2,745 Stock-based compensation $ 355 $ 119 $ 279 $ 753 Long-lived assets (comprised of property, plant and equipment; goodwill; and other intangible assets) held outside the U.S., principally in the United Kingdom and China, were $12,456 December 31, 2020 2019, The following tables disaggregate our business segment revenues by major source and geography. Commercial and Government/Defense Revenue Information: Year ended December 31, 2020: Total Revenue Commercial Government/ Defense Battery & Energy Products $ 91,907 $ 62,330 $ 29,577 Communications Systems 15,805 - 15,805 Total $ 107,712 $ 62,330 $ 45,382 58 % 42 % Year ended December 31, 2019: Total Revenue Commercial Government/ Defense Battery & Energy Products $ 83,996 $ 59,682 $ 24,314 Communications Systems 22,799 - 22,799 Total $ 106,795 $ 59,682 $ 47,113 56 % 44 % U.S. and Non-U.S. Revenue Information 1 : Year ended December 31, 2020: Total Revenue United Non-United Battery & Energy Products $ 91,907 $ 49,930 $ 41,977 Communications Systems 15,805 12,325 3,480 Total $ 107,712 $ 62,255 $ 45,457 58 % 42 % Year ended December 31, 2019: Total Revenue United Non-United Battery & Energy Products $ 83,996 $ 42,224 $ 41,772 Communications Systems 22,799 21,151 1,648 Total $ 106,795 $ 63,375 $ 43,420 59 % 41 % 1 may

Note 12 - Impact of COVID-19

Note 12 - Impact of COVID-19	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Effect of Covid-19 Pandemic [Text Block]	Note 12 19 The COVID- 19 19 first 2020, one March 2020. COVID- 19 2020 one The extent to which COVID- 19 may 19 may 19 19 19 19 may

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	b. Principles of Consolidation The consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and include the accounts of Ultralife Corporation, our wholly-owned subsidiaries, Ultralife Batteries (UK) Ltd., Ultralife UK LTD, and its wholly-owned subsidiary Accutronics Ltd, ABLE New Energy Co., Limited and its wholly-owned subsidiary ABLE New Energy Co., Ltd. (“ABLE” collectively), Southwest Electronic Energy Corporation and its wholly-owned subsidiary, CLB, INC. (“SWE” collectively), and our majority-owned subsidiary Ultralife Batteries India Private Limited (“India JV”). Intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates, Policy [Policy Text Block]	c. Management's Use of Judgment and Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at year end and the reported amounts of revenues and expenses during the reporting period. Key areas affected by estimates include: (a) carrying value of goodwill and intangible assets; (b) reserves for excess and obsolete inventory, deferred tax assets, warranties, and bad debts; (c) valuation of assets acquired and liabilities assumed in business combinations; (d) various expense accruals; and (e) stock-based compensation. Our actual results could differ from these estimates.
Reclassification, Comparability Adjustment [Policy Text Block]	d. Reclassifications Certain items previously reported in specific financial statement captions are reclassified to conform to the current presentation. There were no December 31, 2020 2019.
Cash and Cash Equivalents, Policy [Policy Text Block]	e . Cash Our cash balances may not not
Receivable [Policy Text Block]	f. Accounts Receivable and Allowance for Doubtful Accounts We extend credit to our customers in the normal course of business. We perform ongoing credit evaluations and generally do not 30
Inventory, Policy [Policy Text Block]	g. Inventories Inventories are stated at the lower of cost or net realizable value with cost determined under the firstin, firstout (FIFO) method. We record provisions for excess, obsolete or slow-moving inventory based on changes in customer demand, technology developments or other economic factors.
Property, Plant and Equipment, Policy [Policy Text Block]	h. Property, Plant and Equipment Property, plant and equipment are stated at cost. Depreciation and amortization are computed using the straight-line method over the estimated useful lives. Estimated useful lives are as follows (in years): Buildings 10 – 40 Machinery and Equipment 5 – 10 Furniture and Fixtures 3 – 10 Computer Hardware and Software 3 – 5 Leasehold Improvements Lesser of useful life or lease term Betterments, renewals and extraordinary repairs that extend the life of the assets are capitalized. Other repairs and maintenance costs are expensed when incurred. When disposed, the cost and accumulated depreciation applicable to assets retired are removed from the accounts and the gain or loss on disposition is recognized in operating income.
Goodwill and Intangible Assets, Policy [Policy Text Block]	i. Long-Lived Assets, Goodwill and Intangibles We assess our long-lived assets for impairment whenever events or circumstances indicate that their carrying amounts may not no Under the acquisition method of accounting, the purchase price paid, or the total consideration transferred, to consummate the acquisition is allocated to the identified tangible and intangible assets acquired and liabilities assumed based on their respective estimated fair values as of the acquisition date with the residual amount recorded to goodwill. We do not may The annual impairment test for goodwill consists of a comparison of the estimated fair value for each reporting unit to which goodwill is assigned to the carrying value of the respective reporting unit. The annual impairment test for other indefinite-lived intangible assets consists of a comparison of the estimated fair value of each asset to the carrying value of the respective asset. If the estimated fair value of a reporting unit or other indefinite-lived intangible asset exceeds its respective carrying value, the goodwill or indefinite-lived intangible asset is considered not
Foreign Currency Transactions and Translations Policy [Policy Text Block]	j. Translation of Foreign Currency The financial statements of our foreign subsidiaries are translated from the functional currency into U.S. dollar equivalents, with translation adjustments recorded as the sole component of accumulated other comprehensive income (loss). Exchange gains and losses related to foreign currency transactions and balances denominated in currencies other than the functional currency are recognized in net income.
Revenue [Policy Text Block]	k. Revenue Recognition Revenues are generated from the sale of products. Performance obligations are met and revenue is recognized upon transfer of control to the customer, which is generally upon shipment. When contract terms require transfer of control upon delivery at a customer’s location, revenue is recognized on the date of delivery. For products shipped under vendor managed inventory arrangements, revenue is recognized and billed when the product is consumed by the customer, at which point control has transferred and there are no not Revenues recognized from prior period performance obligations for the years ended December 31, 2020 2019 not As of December 31, 2020 2019, no one 606, Deferred revenue, unbilled revenue and deferred contract costs recorded on our consolidated balance sheets as of December 31, 2020 2019 not
Guarantees, Indemnifications and Warranties Policies [Policy Text Block]	l. Warranty Reserves We generally offer standard warranties against product defects. We do not
Shipping and Handling Costs [Policy Text Block]	m. Shipping and Handling Costs Costs incurred by us related to shipping and handling are included in cost of products sold. Amounts charged to customers pertaining to these costs are reflected as revenue.
Sales Commissions [Policy Text Block]	n. Sales Commissions Sales commissions are expensed as incurred for contracts with an expected duration of one no December 31, 2020 2019.
Research and Development Expense, Policy [Policy Text Block]	o. Research and Development Research and development expenditures are charged to operations as incurred. The majority of research and development expenses pertain to salaries and benefits, developmental supplies, depreciation and other contracted services. For the years ended December 31, 2020 2019,
Environmental Cost, Expense Policy [Policy Text Block]	p. Environmental Costs Environmental expenditures that relate to current operations are expensed. Remediation costs that relate to an existing condition caused by past operations are accrued when it is probable that these costs will be incurred and can be reasonably estimated.
Income Tax, Policy [Policy Text Block]	q. Income Taxes We account for income taxes using the asset and liability method. Under this method, deferred tax assets and liabilities are determined based on differences between financial reporting and tax basis of assets and liabilities and are measured using the enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. Pursuant to ASC 740, not not,
Concentration Risk, Credit Risk, Policy [Policy Text Block]	r. Concentration Related to Customers and Suppliers We have two customers, both large defense primary contractors, which comprised 17% and 6% of our total revenues in 2020, 2019, 2020 2019 no 10% Currently, we do not We generally do not 2020 2019, not Certain materials and components used in our products are available only from a single or a limited number of suppliers. As such, some materials and components could become in short supply resulting in limited availability and/or increased costs. Additionally, we may
Fair Value Measurement, Policy [Policy Text Block]	s. Fair Value Measurements and Disclosures Fair value is defined as the price that would be received for an asset or the exit price that would be paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. Fair value is estimated by applying the following hierarchy, which prioritizes the inputs used to measure fair value into three Level 1: Quoted prices in active markets for identical assets or liabilities. Level 2: Observable inputs, other than Level 1 not Level 3: Unobservable inputs supported by little or no The fair value of financial instruments approximated their carrying values at December 31, 2020 2019.
Earnings Per Share, Policy [Policy Text Block]	t. Earnings Per Share Basic earnings per share (“EPS”) is computed by dividing net income attributable to Ultralife Corporation by the weighted average shares of common stock outstanding for the period. Diluted EPS reflects the assumed exercise and conversion of dilutive outstanding stock options and unvested restricted stock, if any, applying the treasury stock method. For the year ended December 31, 2020, December 31, 2020 For the year ended December 31, 2019, December 31, 2019
Share-based Payment Arrangement [Policy Text Block]	u. Stock-Based Compensation We have various stock-based employee compensation plans that are described more fully in Note 7.
Segment Reporting, Policy [Policy Text Block]	v. Segment Reporting We have two operating segments – Battery & Energy Products, and Communications Systems. The basis for determining our operating segments is the manner in which financial information is used in monitoring our operations. Management operates and organizes itself according to business units that comprise unique products and services across geographic locations.
Lessee, Leases [Policy Text Block]	w. Leases At contract inception, the Company determines whether the arrangement is or contains a lease and determines the lease classification. The lease term is determined based on the non-cancellable term of the lease adjusted to the extent optional renewal terms and termination rights are reasonably certain. Lease expense is recognized evenly over the lease term. Variable lease payments are recognized as period costs. The present value of remaining lease payments is recognized as a liability on the balance sheet with a corresponding right-of-use asset adjusted for prepaid or accrued lease payments. The Company uses its incremental borrowing rate for the discount rate, unless the interest rate implicit in the lease contract is readily determinable. The Company has adopted the practical expedients to not not 9
New Accounting Pronouncements, Policy [Policy Text Block]	x. Recent Accounting Pronouncements Recently Adopted Accounting Guidance Effective January 1, 2020, 2017 04, 350 two not Recent Accounting Guidance Not In June 2016, 2016 13, 326 December 15, 2022. In December 2019, 2019 12, 740 2019 12 740 2019 12 December 15, 2020. not 2019 12

Note 1 - Summary of Operation_2

Note 1 - Summary of Operations and Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Property, Plant and Equipment, Estimated Useful Life [Table Text Block]	Buildings 10 – 40 Machinery and Equipment 5 – 10 Furniture and Fixtures 3 – 10 Computer Hardware and Software 3 – 5 Leasehold Improvements Lesser of useful life or lease term

Note 2 - Acquisition (Tables)

Note 2 - Acquisition (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	Cash $ 942 Accounts receivable 3,621 Inventories 4,685 Other current assets 431 Property, plant and equipment 9,177 Goodwill 6,534 Customer relationships 2,522 Trade name 1,127 Accounts payable (1,060 ) Other current liabilities (778 ) Deferred tax liability, net (1,011 ) Net assets acquired $ 26,190
Business Acquisition, Pro Forma Information [Table Text Block]	Year Ended December 31, 2020 2019 Revenue $ 107,712 $ 115,590 Operating income 5,701 8,008 Net Income attributable to Ultralife Corporation 5,232 5,526 Net income per share attributable to Ultralife Corporation: Basic $ 0.33 $ 0.35 Diluted $ 0.33 $ 0.34

Note 5 - Supplemental Balance_2

Note 5 - Supplemental Balance Sheet Information (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Cash, Cash Equivalents and Investments [Table Text Block]	December 31, 2020 2019 Cash $ 10,562 $ 7,135 Restricted cash 91 270 Total $ 10,653 $ 7,405
Schedule of Inventory, Current [Table Text Block]	December 31, 2020 2019 Raw materials $ 17,277 $ 18,485 Work in process 3,411 2,548 Finished products 7,505 8,726 Total $ 28,193 $ 29,759
Property, Plant and Equipment [Table Text Block]	December 31, 2020 2019 Land $ 1,273 $ 1,273 Buildings and leasehold improvements 15,393 15,386 Machinery and equipment 61,048 55,058 Furniture and fixtures 2,235 2,194 Computer hardware and software 6,894 6,712 Construction in progress 1,227 4,730 88,070 85,353 Less – Accumulated depreciation (65,220 ) (62,828 ) Total $ 22,850 $ 22,525
Schedule of Goodwill [Table Text Block]	Battery & Communications Systems Total Balance – January 1, 2019 $ 8,616 $ 11,493 $ 20,109 Acquisition of SWE 6,534 - 6,534 Effect of foreign currency translation 110 - 110 Balance – December 31, 2019 15,260 11,493 26,753 Effect of foreign currency translation 265 - 265 Balance – December 31, 2020 $ 15,525 $ 11,493 $ 27,018
Schedule of Finite-Lived Intangible Assets [Table Text Block]	December 31, 2020, Cost Accumulated amortization Net Trademarks $ 3,410 $ - $ 3,410 Customer relationships 9,171 5,115 4,056 Patents and technology 5,557 5,014 543 Distributor relationships 377 377 0 Trade name 1,524 324 1,200 Total other intangible assets $ 20,039 $ 10,830 $ 9,209 December 31, 2019, Cost Accumulated amortization Net Trademarks $ 3,403 $ - $ 3,403 Customer relationships 9,080 4,721 4,359 Patents and technology 5,521 4,869 652 Distributor relationships 377 377 - Trade name 1,511 204 1,307 Total other intangible assets $ 19,892 $ 10,171 $ 9,721
Finite-lived Intangible Assets Amortization Expense [Table Text Block]	Year ended December 31, 2020 2019 Research and development expense $ 124 $ 130 Selling, general and administrative expense 471 395 Total $ 595 $ 525

Note 6 - Commitments and Cont_2

Note 6 - Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Product Warranty Liability [Table Text Block]	2020 2019 Balance, January 1 $ 195 $ 95 Assumed warranty obligations – SWE - 145 Provision for warranties issued 200 114 Settlements made (246 ) (159 ) Balance, December 31 $ 149 $ 195

Note 7 - Shareholders' Equity (

Note 7 - Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]	Year ended December 31, 2020 2019 Stock options $ 838 $ 623 Restricted stock 105 130 Total $ 943 $ 753
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	Year ended December 31, 2020 2019 Risk-free interest rate 0.4 % 1.8 % Volatility factor 49 % 48 % Weighted average expected life (years) 5.3 5.3 Forfeiture rate 10.0 % 10.0 % Dividends 0.0 % 0.0 %
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Year ended December 31, 2020 Number of shares Weighted average exercise price per share Weighted average remaining contractual term Aggregate intrinsic value Shares under option – January 1 1,541,792 $ 6.88 Options granted 256,000 6.51 Options exercised (355,797 ) 6.08 Options forfeited or expired (224,332 ) 9.76 Shares under option – December 31 1,217,163 $ 6.50 3.97 $ 1,034 Vested and expected to vest - December 31 1,115,705 $ 6.39 3.81 $ 1,034 Options exercisable – December 31 738,452 $ 5.82 2.79 $ 1,034 Year ended December 31, 2019 Number of shares Weighted average exercise price per share Shares under option – January 1 1,576,087 $ 6.58 Options granted 282,500 8.27 Options exercised (208,881 ) 4.45 Options forfeited or expired (107,914 ) 10.93 Shares under option – December 31 1,541,792 $ 6.88 Options exercisable – December 31 1,083,581 $ 6.28
Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]	Option outstanding Options exercisable Range of exercise prices Number of outstanding options Weighted- average remaining contractual life Weighted- average exercise price Number of options exercisable Weighted- average exercise price $3.71 - $3.94 204,244 0.81 $ 3.80 204,244 $ 3.80 $4.29 - $5.71 317,667 2.78 4.93 317,667 4.93 $6.24 - $7.16 267,333 6.13 6.54 13,667 6.87 $8.25 - $9.96 427,919 5.01 8.92 202,874 9.19 $3.71 - $9.96 1,217,163 3.97 $ 6.50 738,452 $ 5.82

Note 8 - Income Taxes (Tables)

Note 8 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Year ended December 31, 2020 2019 Current: State $ 23 $ 43 Foreign 283 203 306 246 Deferred: Federal 1,673 1,236 Foreign (287 ) (25 ) 1,386 1,211 Total income tax provision $ 1,692 $ 1,457
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	December 31, 2020 2019 Deferred tax assets: Net operating loss carryforwards 12,481 14,579 Tax credit carryforwards 2,070 1,907 Intangible assets 1,352 1,283 Accrued expenses, reserves and other 2,176 2,265 Research and development 984 - Total deferred tax assets 19,063 20,034 Valuation allowance for deferred tax assets (1,942 ) (1,942 ) Net deferred tax assets 17,121 18,092 Deferred tax liabilities: Property, plant and equipment (262 ) (342 ) Intangible assets (5,538 ) (5,087 ) Total deferred tax liabilities (5,800 ) (5,429 ) Net deferred tax assets $ 11,321 $ 12,663
Schedule of Net Deferred Tax Liabilities [Table Text Block]	December 31, 2020 2019 Deferred tax assets $ 11,836 $ 13,222 Deferred tax liabilities (515 ) (559 ) $ 11,321 $ 12,663
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]	Year ended December 31, 2020 2019 United States $ 6,586 $ 5,992 Foreign 437 779 $ 7,023 $ 6,771
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Year ended December 31, 2020 2019 Statutory income tax rate 21 % 21 % Increase (decrease) in tax provision resulting from: Equity compensation 4.5 (0.4 ) Income tax credits (2.3 ) (0.4 ) Foreign tax rates 0.1 (0.5 ) Other 0.8 1.8 Effective income tax rate 24.1 % 21.5 %

Note 9 - Operating Leases (Tabl

Note 9 - Operating Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Lease, Cost [Table Text Block]	Year ended December 31, 2020 2019 Operating lease cost $ 703 $ 628 Variable lease cost 75 84 Total lease cost $ 778 $ 712
Lessee, Lease, Cash Flow Information [Table Text Block]	Year ended December 31, 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 688 $ 611 Right-of-use assets obtained in exchange for lease liabilities: $ 875 $ 1,586
Lessee, Lease, Balance Sheet Information [Table Text Block]	December 31, Balance Sheet Classification 2020 2019 Assets: Operating lease right-of-use asset Other noncurrent assets $ 2,189 $ 1,866 Liabilities: Current operating lease liability Accrued expenses and other current liabilities $ 680 $ 620 Operating lease liability, net of current portion Other noncurrent liabilities 1,524 1,247 Total operating lease liability $ 2,204 $ 1,867 Weighted-average remaining lease term (years) 3.3 3.7 Weighted-average discount rate 4.5 % 4.5 %
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	Maturity of Operating Lease Liabilities 2021 $ 724 2022 693 2023 713 2024 275 Thereafter - Total lease payments $ 2,405 Less: Imputed interest (201 ) Present value of remaining lease payments $ 2,204

Note 11 - Business Segment In_2

Note 11 - Business Segment Information (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Battery & Energy Products Communications Systems Corporate Total Revenue $ 91,907 $ 15,805 $ - $ 107,712 Segment contribution 23,400 5,759 (23,458 ) 5,701 Other income (1,322 ) (1,322 ) Income tax expense 1,692 1,692 Non-controlling interest 99 99 Net income attributable to Ultralife $ 5,232 Total assets $ 85,112 $ 26,425 $ 26,164 $ 137,701 Capital expenditures $ 3,031 $ - $ 70 $ 3,101 Goodwill $ 15,525 $ 11,493 - $ 27,018 Depreciation and amortization of intangible assets $ 2,269 $ 342 $ 324 $ 2,935 Stock-based compensation $ 446 $ 155 $ 342 $ 943 Battery & Communications Corporate Total Revenue $ 83,996 $ 22,799 $ - $ 106,795 Segment contribution 22,813 8,352 (23,797 ) 7,368 Other expense 597 597 Income tax expense 1,457 1,457 Non-controlling interest 109 109 Net income attributable to Ultralife $ 5,205 Total assets $ 79,413 $ 40,458 $ 24,686 $ 144,557 Capital expenditures $ 5,805 $ 44 $ 432 $ 6,281 Goodwill $ 15,260 $ 11,493 - $ 26,753 Depreciation and amortization of intangible assets $ 2,104 $ 364 $ 277 $ 2,745 Stock-based compensation $ 355 $ 119 $ 279 $ 753
Schedule of Revenues from External Customers by Business Segment Sector [Table Text Block]	Total Revenue Commercial Government/ Defense Battery & Energy Products $ 91,907 $ 62,330 $ 29,577 Communications Systems 15,805 - 15,805 Total $ 107,712 $ 62,330 $ 45,382 58 % 42 % Total Revenue Commercial Government/ Defense Battery & Energy Products $ 83,996 $ 59,682 $ 24,314 Communications Systems 22,799 - 22,799 Total $ 106,795 $ 59,682 $ 47,113 56 % 44 %
Revenue from External Customers by Geographic Areas [Table Text Block]	Total Revenue United Non-United Battery & Energy Products $ 91,907 $ 49,930 $ 41,977 Communications Systems 15,805 12,325 3,480 Total $ 107,712 $ 62,255 $ 45,457 58 % 42 % Total Revenue United Non-United Battery & Energy Products $ 83,996 $ 42,224 $ 41,772 Communications Systems 22,799 21,151 1,648 Total $ 106,795 $ 63,375 $ 43,420 59 % 41 %

Note 1 - Summary of Operation_3

Note 1 - Summary of Operations and Significant Accounting Policies (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)shares	Dec. 31, 2019USD ($)shares
Research and Development Expense, Gross | $	$ 7,316	$ 8,025
Customer Funded Research and Development Expense Included in Cost of Goods Sold | $	$ 1,369	$ 1,220
Weighted Average Number Diluted Shares Outstanding Adjustment, Total (in shares)	193,568	396,536
Number of Operating Segments	2
Share-based Payment Arrangement, Option [Member]
Incremental Common Shares Attributable to Share-based Payment Arrangements, Total (in shares)	526,244	899,041
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	690,919	642,751
Restricted Stock [Member]
Incremental Common Shares Attributable to Share-based Payment Arrangements, Total (in shares)	26,665	31,666
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Major Customers	2
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Large Defense Primary Contractor, 1 [Member]
Concentration Risk, Percentage	17.00%	12.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Large Defense Primary Contractor, 2 [Member]
Concentration Risk, Percentage	6.00%	14.00%
Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member]
Number of Major Customers	2	2
Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Two Customers [Member] | Battery & Energy Products Segment [Member]
Concentration Risk, Percentage	20.00%	15.00%
Customer Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Two Customers [Member] | Communications Systems Segment [Member]
Concentration Risk, Percentage	38.00%	64.00%

Note 1 - Summary of Operation_4

Note 1 - Summary of Operations and Significant Accounting Policies - Property, Plant and Equipment Estimated Useful Life (Details)	12 Months Ended
	Dec. 31, 2020
Building [Member] | Minimum [Member]
Estimated useful lives (Year)	10 years
Building [Member] | Maximum [Member]
Estimated useful lives (Year)	40 years
Machinery and Equipment [Member] | Minimum [Member]
Estimated useful lives (Year)	5 years
Machinery and Equipment [Member] | Maximum [Member]
Estimated useful lives (Year)	10 years
Furniture and Fixtures [Member] | Minimum [Member]
Estimated useful lives (Year)	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Estimated useful lives (Year)	10 years
Computer Equipment [Member] | Minimum [Member]
Estimated useful lives (Year)	3 years
Computer Equipment [Member] | Maximum [Member]
Estimated useful lives (Year)	5 years
Leasehold Improvements [Member]
Leasehold Improvements	Lesser of useful life or lease term

Note 2 - Acquisition (Details T

Note 2 - Acquisition (Details Textual) - USD ($) $ in Thousands	May 01, 2019	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Payments to Acquire Businesses, Net of Cash Acquired, Total			$ 0	$ 25,248
Payments of Debt Issuance Costs			0	157
Southwest Electronic Energy Corporation [Member]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Payments to Acquire Businesses, Net of Cash Acquired, Total	$ 26,190
Cash Acquired from Acquisition	$ 942
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual		$ 18,746	15,587
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual		1,238	705
Business Combination, Interest Expense, Financing		453	292
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles		161	$ 243
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory		264
Business Combination, Acquisition Related Costs		$ 165		322
Payments of Debt Issuance Costs				157
Southwest Electronic Energy Corporation [Member] | Accounting, Legal, and Due Diligence Services [Member]
Business Combination, Acquisition Related Costs				$ 165

Note 2 - Acquisition - Assets A

Note 2 - Acquisition - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	May 01, 2019	Dec. 31, 2018
Goodwill	$ 27,018	$ 26,753		$ 20,109
Southwest Electronic Energy Corporation [Member]
Cash			$ 942
Accounts receivable			3,621
Inventories			4,685
Other current assets			431
Property, plant and equipment			9,177
Goodwill			6,534
Accounts payable			(1,060)
Other current liabilities			(778)
Deferred tax liability, net			(1,011)
Net assets acquired			26,190
Southwest Electronic Energy Corporation [Member] | Customer Relationships [Member]
Intangible assets			2,522
Southwest Electronic Energy Corporation [Member] | Trade Names [Member]
Intangible assets			$ 1,127

Note 2 - Acquisition - Pro Form

Note 2 - Acquisition - Pro Forma Information (Details) - Southwest Electronic Energy Corporation [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue	$ 107,712	$ 115,590
Operating income	5,701	8,008
Net Income attributable to Ultralife Corporation	$ 5,232	$ 5,526
Basic (in dollars per share)	$ 0.33	$ 0.35
Diluted (in dollars per share)	$ 0.33	$ 0.34

Note 3 - Debt (Details Textual)

Note 3 - Debt (Details Textual) $ in Thousands	May 01, 2019USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	May 31, 2019
Proceeds from Long-term Lines of Credit		$ 0	$ 10,182
Term Loan Facility [Member]
Debt Instrument, Number of Monthly Payment				60
Amended Credit Agreement [Member]
Debt Issuance Costs, Gross		113
Repayments of Long-term Debt, Total		4,200
Amended Credit Agreement [Member] | Revolving Credit Facility [Member]
Proceeds from Long-term Lines of Credit	$ 6,782
Long-term Line of Credit, Total		0
Minimum Fixed Charge Coverage Ratio	1.15
Maximum Consolidated Senior Leverage Ratio	2.5
Amended Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.10%
Amended Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.20%
Amended Credit Agreement [Member] | Revolving Credit Facility [Member] | Fed Funds Effective Rate Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Amended Credit Agreement [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Amended Credit Agreement [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	1.85%
Amended Credit Agreement [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	2.15%
Amended Credit Agreement [Member] | Revolving Credit Facility [Member] | Base Rate [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Amended Credit Agreement [Member] | Revolving Credit Facility [Member] | Base Rate [Member] | Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	(0.50%)
Term Loan Facility [Member] | Revolving Credit Facility [Member] | Long-term Debt, Current Maturities [Member]
Secured Debt, Total		$ 1,474
KeyBank [Member] | Amended Credit Agreement [Member] | Term Loan Facility [Member]
Debt Instrument, Term (Year)	5 years
Debt Instrument, Face Amount	$ 8,000
KeyBank [Member] | Amended Credit Agreement [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	30,000
Line Of Credit Facility Maximum Borrowing Capacity Contingent On Bank Approval	$ 50,000

Note 4 - Share Repurchase Pro_2

Note 4 - Share Repurchase Program (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Oct. 31, 2019	Dec. 31, 2018	Nov. 01, 2018
Treasury Stock, Shares, Acquired (in shares)	0	267,300	372,974	105,674
Treasury Stock, Value, Acquired, Cost Method		$ 1,957	$ 2,699	$ 742
Maximum [Member]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)					2,500,000

Note 5 - Supplemental Balance_3

Note 5 - Supplemental Balance Sheet Information (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Ending Balance	$ 10,653	$ 7,405	$ 25,934
Restricted Cash and Cash Equivalents, Total	91	270
Revenues, Total	107,712	106,795
Depreciation, Total	$ 2,340	2,220
Number of Reporting Units	5
Goodwill, Impairment Loss	$ 0
Finite-Lived Intangible Asset, Expected Amortization, Year One	352
Finite-Lived Intangible Asset, Expected Amortization, Year Two	337
Finite-Lived Intangible Asset, Expected Amortization, Year Three	334
Finite-Lived Intangible Asset, Expected Amortization, Year Four	324
Finite-Lived Intangible Asset, Expected Amortization, Year Five	324
Grant [Member]
Revenues, Total	188
NETHERLANDS
Restricted Cash and Cash Equivalents, Total	$ 91	82
CHINA
Restricted Cash and Cash Equivalents, Total		$ 188

Note 5 - Supplemental Balance_4

Note 5 - Supplemental Balance Sheet Information - Cash and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash	$ 10,562	$ 7,135
Restricted cash	91	270
Total	$ 10,653	$ 7,405	$ 25,934

Note 5 - Supplemental Balance_5

Note 5 - Supplemental Balance Sheet Information - Components of Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Raw materials	$ 17,277	$ 18,485
Work in process	3,411	2,548
Finished products	7,505	8,726
Total	$ 28,193	$ 29,759

Note 5 - Supplemental Balance_6

Note 5 - Supplemental Balance Sheet Information - Components of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, plant and equipment, gross	$ 88,070	$ 85,353
Less – Accumulated depreciation	(65,220)	(62,828)
Total	22,850	22,525
Land [Member]
Property, plant and equipment, gross	1,273	1,273
Building and Building Improvements [Member]
Property, plant and equipment, gross	15,393	15,386
Machinery and Equipment [Member]
Property, plant and equipment, gross	61,048	55,058
Furniture and Fixtures [Member]
Property, plant and equipment, gross	2,235	2,194
Computer Equipment [Member]
Property, plant and equipment, gross	6,894	6,712
Construction in Progress [Member]
Property, plant and equipment, gross	$ 1,227	$ 4,730

Note 5 - Supplemental Balance_7

Note 5 - Supplemental Balance Sheet Information - Summary of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Goodwill balance	$ 26,753	$ 20,109
Acquisition of SWE		6,534
Effect of foreign currency translation	265	110
Goodwill balance	27,018	26,753
Battery & Energy Products Segment [Member]
Goodwill balance	15,260	8,616
Acquisition of SWE		6,534
Effect of foreign currency translation	265	110
Goodwill balance	15,525	15,260
Communications Systems Segment [Member]
Goodwill balance	11,493	11,493
Acquisition of SWE		0
Effect of foreign currency translation	0	0
Goodwill balance	$ 11,493	$ 11,493

Note 5 - Supplemental Balance_8

Note 5 - Supplemental Balance Sheet Information - Composition of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Cost	$ 20,039	$ 19,892
Accumulated Amortization	10,830	10,171
Net	9,209	9,721
Trademarks [Member]
Cost	3,410	3,403
Accumulated Amortization	0	0
Net	3,410	3,403
Customer Relationships [Member]
Cost	9,171	9,080
Accumulated Amortization	5,115	4,721
Net	4,056	4,359
Patented Technology [Member]
Cost	5,557	5,521
Accumulated Amortization	5,014	4,869
Net	543	652
Distributor Relationships [Member]
Cost	377	377
Accumulated Amortization	377	377
Net	0	0
Trade Names [Member]
Cost	1,524	1,511
Accumulated Amortization	324	204
Net	$ 1,200	$ 1,307

Note 5 - Supplemental Balance_9

Note 5 - Supplemental Balance Sheet Information - Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Amortization of intangible assets	$ 595	$ 525
Research and Development Expense [Member]
Amortization of intangible assets	124	130
Selling, General and Administrative Expenses [Member]
Amortization of intangible assets	$ 471	$ 395

Note 6 - Commitments and Cont_3

Note 6 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Dec. 14, 2020	Dec. 31, 2020	Dec. 31, 2019
Gain (Loss) Related to Litigation Settlement, Total		$ 1,593	$ 0
Capital Addition Purchase Commitments [Member]
Long-term Purchase Commitment, Amount		$ 873
Lithium Ion Batteries Antitrust Litigation [Member]
Litigation Settlement, Amount Awarded from Other Party	$ 1,593
Gain (Loss) Related to Litigation Settlement, Total	$ 1,593

Note 6 - Commitments and Cont_4

Note 6 - Commitments and Contingencies - Changes in Produce Warranty Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Balance, January 1	$ 195	$ 95
Assumed warranty obligations – SWE	0	145
Provision for warranties issued	200	114
Settlements made	(246)	(159)
Balance, December 31	$ 149	$ 195

Note 7 - Shareholders' Equity_2

Note 7 - Shareholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	Nov. 23, 2020	Jul. 25, 2018	Dec. 30, 2010	Oct. 31, 2020	Apr. 30, 2019	Jan. 31, 2018	Jun. 30, 2014	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2004
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)								1,217,163	1,541,792	1,576,087
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)								256,000	282,500
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)								$ 6.51	$ 8.27
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount								$ 566
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)								1 year 1 month 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)								$ 2.78	$ 3.77
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value								$ 427	$ 931
Proceeds from Stock Options Exercised								$ 238	$ 930
Common Stock, Capital Shares Reserved for Future Issuance (in shares)								249,604
Restricted Stock [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)								1 year 10 months 24 days
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount								$ 70
The 2004 Long-term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)								2,900,000			750,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)								73,995
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	37,171
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)	$ 7.33
The 2004 Long-term Incentive Plan [Member] | President [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)			5 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	26,929
Option Accelerated Vesting, Stock Price Trigger (in dollars per share)		$ 10
Option Accelerated Vesting, Threshold Trading Days (Day)		15 days
The 2004 Long-term Incentive Plan [Member] | Options I [Member] | President [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)			50,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)			$ 6.42
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Incremental Vesting Shares (in shares)			12,500
The 2004 Long-term Incentive Plan [Member] | Options II [Member] | President [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)			250,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)			$ 6.42
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Incremental Vesting Shares (in shares)			62,500
The 2004 Long-term Incentive Plan [Member] | Options III [Member] | President [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)			200,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)			$ 10
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Incremental Vesting Shares (in shares)			50,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Minimum Closing Share Price (in dollars per share)			$ 10
The 2004 Long-term Incentive Plan [Member] | Options IV [Member] | President [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)			200,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)			$ 15
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Incremental Vesting Shares (in shares)			50,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Minimum Closing Share Price (in dollars per share)			$ 15
The 2014 Long-term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)							1,750,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)								1,143,168
The 2014 Long-term Incentive Plan [Member] | Awards Other than Stock Options and SARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)							800,000
The 2014 Long-term Incentive Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)						3 years
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)				5,000	20,000	17,500
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)				$ 6.08	$ 11.12	$ 7.16
Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)							3 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)							7 years

Note 7 - Stock-based Compensati

Note 7 - Stock-based Compensation - Non-cash Stock Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Stock-based comepensation expense	$ 943	$ 753
Share-based Payment Arrangement, Option [Member]
Stock-based comepensation expense	838	623
Restricted Stock [Member]
Stock-based comepensation expense	$ 105	$ 130

Note 7 - Stock-based Compensa_2

Note 7 - Stock-based Compensation - Stock Option Assumptions (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Risk-free interest rate	0.40%	1.80%
Volatility factor	49.00%	48.00%
Weighted Average Expected Life (Year)	5 years 3 months 18 days	5 years 3 months 18 days
Forfeiture rate	10.00%	10.00%
Dividends	0.00%	0.00%

Note 7 - Shareholders' Equity -

Note 7 - Shareholders' Equity - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Shares under Option, beginning of period (in shares)	1,541,792	1,576,087
Options outstanding - weighted average exercise price (in dollars per share)	$ 6.88	$ 6.58
Options granted (in shares)	256,000	282,500
Options granted - weighted average exercise price (in dollars per share)	$ 6.51	$ 8.27
Options exercised (in shares)	(355,797)	(208,881)
Options exercised - weighted average exercise price (in dollars per share)	$ 6.08	$ 4.45
Options forfeited or expired (in shares)	(224,332)	(107,914)
Options forfeited or expired - weighted average exercise price (in dollars per share)	$ 9.76	$ 10.93
Shares under option, end of period (in shares)	1,217,163	1,541,792
Options outstanding - weighted average exercise price (in dollars per share)	$ 6.50	$ 6.88
Options outstanding - weighted average remaining contractual term (Year)	3 years 11 months 19 days
Options outstanding - aggregate intrinsic value	$ 1,034
Vested and Expected to Vest (in shares)	1,115,705
Options vested and expected to vest - weighted average exercise price (in dollars per share)	$ 6.39
Options vested and expected to vest - weighted average remaining contractual term (Year)	3 years 9 months 21 days
Options vested and expected to vest - aggregate intrinsic value	$ 1,034
Options Exercisable (in shares)	738,452	1,083,581
Options exercisable, weighted-average exercise price (in dollars per share)	$ 5.82	$ 6.28
Options exercisable - weighted average remaining contractual term (Year)	2 years 9 months 14 days
Options exercisable - aggregate intrinsic value	$ 1,034

Note 7 - Shareholders' Equity_3

Note 7 - Shareholders' Equity - Options Range of Exercise Prices (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Upper range limit (in dollars per share)	$ 9.96
Options outstanding, number of outstanding options (in shares)	1,217,163
Options outstanding, weighted-average remaining contractual life (Year)	3 years 11 months 19 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 6.50
Options exercisable, number of options exercisable (in shares)	738,452
Options exercisable, weighted-average exercise price (in dollars per share)	$ 5.82	$ 6.28
Range One [Member]
Upper range limit (in dollars per share)	$ 3.94
Options outstanding, number of outstanding options (in shares)	204,244
Options outstanding, weighted-average remaining contractual life (Year)	9 months 21 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 3.80
Options exercisable, number of options exercisable (in shares)	204,244
Options exercisable, weighted-average exercise price (in dollars per share)	$ 3.80
Range Two [Member]
Upper range limit (in dollars per share)	$ 5.71
Options outstanding, number of outstanding options (in shares)	317,667
Options outstanding, weighted-average remaining contractual life (Year)	2 years 9 months 10 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 4.93
Options exercisable, number of options exercisable (in shares)	317,667
Options exercisable, weighted-average exercise price (in dollars per share)	$ 4.93
Range Three [Member]
Upper range limit (in dollars per share)	$ 7.16
Options outstanding, number of outstanding options (in shares)	267,333
Options outstanding, weighted-average remaining contractual life (Year)	6 years 1 month 17 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 6.54
Options exercisable, number of options exercisable (in shares)	13,667
Options exercisable, weighted-average exercise price (in dollars per share)	$ 6.87
Range Four [Member]
Upper range limit (in dollars per share)	$ 9.96
Options outstanding, number of outstanding options (in shares)	427,919
Options outstanding, weighted-average remaining contractual life (Year)	5 years 3 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 8.92
Options exercisable, number of options exercisable (in shares)	202,874
Options exercisable, weighted-average exercise price (in dollars per share)	$ 9.19

Note 8 - Income Taxes (Details

Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Tax Expense (Benefit), Total	$ 1,692	$ 1,457
Deferred Tax Assets, Valuation Allowance, Total	1,942	1,942
Unrecognized Tax Benefits, Ending Balance	0	$ 0
General Business Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	2,070
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards, Total	$ 47,755
Open Tax Year	2001 2002 2005 2006 2007 2011 2012 2013 2014 2015
Foreign Tax Authority [Member]
Deferred Tax Assets, Valuation Allowance, Total	$ 0
Open Tax Year	2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
Foreign Tax Authority [Member] | Her Majesty's Revenue and Customs (HMRC) [Member]
Operating Loss Carryforwards, Total	$ 11,000
State and Local Jurisdiction [Member]
Open Tax Year	2001 2002 2005 2006 2007 2011 2012 2013 2014 2015 2016 2017 2018 2019

Note 8 - Income Taxes - Income

Note 8 - Income Taxes - Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
State	$ 23	$ 43
Foreign	283	203
Current Income Tax Expense (Benefit), Total	306	246
Federal	1,673	1,236
Foreign	(287)	(25)
Deferred Income Tax Expense (Benefit), Total	1,386	1,211
Total income tax provision	$ 1,692	$ 1,457

Note 8 - Income Taxes - Deferre

Note 8 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Net operating loss carryforwards	$ 12,481	$ 14,579
Tax credit carryforwards	2,070	1,907
Intangible assets	1,352	1,283
Accrued expenses, reserves and other	2,176	2,265
Research and development	984	0
Total deferred tax assets	19,063	20,034
Valuation allowance for deferred tax assets	(1,942)	(1,942)
Net deferred tax assets	17,121	18,092
Property, plant and equipment	(262)	(342)
Intangible assets	5,538	5,087
Total deferred tax liabilities	(5,800)	(5,429)
Net deferred tax assets	$ 11,321	$ 12,663

Note 8 - Income Taxes - Net Def

Note 8 - Income Taxes - Net Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred income taxes, net	$ 11,836	$ 13,222
Deferred tax liabilities	(515)	(559)
Net Deferred Tax Assets	$ 11,321	$ 12,663

Note 8 - Income Taxes - United

Note 8 - Income Taxes - United States and Foreign Income (Loss) From Continuing Operations Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
United States	$ 6,586	$ 5,992
Foreign	437	779
Income Before Income Taxes	$ 7,023	$ 6,771

Note 8 - Income Taxes - Effecti

Note 8 - Income Taxes - Effective Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statutory income tax rate	21.00%	21.00%
Equity compensation	4.50%	(0.40%)
Income tax credits	(2.30%)	(0.40%)
Foreign tax rates	0.10%	(0.50%)
Other	0.80%	1.80%
Effective income tax rate	24.10%	21.50%

Note 9 - Operating Leases (Deta

Note 9 - Operating Leases (Details Textual)	Dec. 31, 2020
Minimum [Member]
Operating Lease, Remaining Lease Term (Year)	1 year
Maximum [Member]
Operating Lease, Remaining Lease Term (Year)	4 years

Note 9 - Operating Leases - Lea

Note 9 - Operating Leases - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating lease cost	$ 703	$ 628
Variable lease cost	75	84
Total lease cost	$ 778	$ 712

Note 9 - Operating Leases - Sup

Note 9 - Operating Leases - Supplement Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating cash flows from operating leases	$ 688	$ 611
Right-of-use assets obtained in exchange for lease liabilities:	$ 875	$ 1,586

Note 9 - Operating Leases - S_2

Note 9 - Operating Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Weighted-average remaining lease term (years) (Year)	3 years 3 months 18 days	3 years 8 months 12 days
Weighted-average discount rate	4.50%	4.50%
Other Noncurrent Assets [Member]
Operating lease right-of-use asset	$ 2,189	$ 1,866
Accrued Expenses and Other Current Liabilities [Member]
Current operating lease liability	680	620
Other Noncurrent Liabilities [Member]
Operating lease liability, net of current portion	1,524	1,247
Accrued Expenses and Other Current Liabilites and Other Noncurrent Liabilities [Member]
Total operating lease liability	$ 2,204	$ 1,867

Note 9 - Operating Leases - Fut

Note 9 - Operating Leases - Future Minimum Lease Payments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
2021	$ 724
2022	693
2023	713
2024	275
Thereafter	0
Total lease payments	2,405
Less: Imputed interest	(201)
Accrued Expenses and Other Current Liabilites and Other Noncurrent Liabilities [Member]
Present value of remaining lease payments	$ 2,204	$ 1,867

Note 10 - 401(k) Retirement B_2

Note 10 - 401(k) Retirement Benefit Plan (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%	50.00%
Defined Contribution Plan, Maximum Employee Contribution Percentage, Subject to Employer Matching Contribution	6.00%	6.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 338	$ 319

Note 11 - Business Segment In_3

Note 11 - Business Segment Information (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019USD ($)
Number of Operating Segments	2
Non-US [Member]
Long-Lived Assets		$ 12,414

Note 11 - Business Segment In_4

Note 11 - Business Segment Information - Segment Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue	$ 107,712	$ 106,795
Segment contribution	5,701	7,368
Other income	(1,322)	597
Income tax provision (benefit)	1,692	1,457
Non-controlling interest	99	109
Net income attributable to Ultralife	5,232	5,205
Total assets	137,701	144,557
Capital expenditures	3,101	6,281
Goodwill	27,018	26,753	$ 20,109
Depreciation and amortization of intangible assets	2,935	2,745
Stock-based compensation	943	753
Battery & Energy Products Segment [Member]
Revenue	91,907	83,996
Segment contribution	23,400	22,813
Total assets	85,112	79,413
Capital expenditures	3,031	5,805
Goodwill	15,525	15,260	8,616
Depreciation and amortization of intangible assets	2,269	2,104
Stock-based compensation	446	355
Communications Systems Segment [Member]
Revenue	15,805	22,799
Segment contribution	5,759	8,352
Total assets	26,425	40,458
Capital expenditures	0	44
Goodwill	11,493	11,493	$ 11,493
Depreciation and amortization of intangible assets	342	364
Stock-based compensation	155	119
Corporate Segment [Member]
Revenue	0	0
Segment contribution	(23,458)	(23,797)
Other income	(1,322)	597
Income tax provision (benefit)	1,692	1,457
Non-controlling interest	99	109
Total assets	26,164	24,686
Capital expenditures	70	432
Goodwill	0	0
Depreciation and amortization of intangible assets	324	277
Stock-based compensation	$ 342	$ 279

Note 11 - Business Segment In_5

Note 11 - Business Segment Information - Revenue by Business Segment Sector (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Revenue	[1]	$ 107,712	$ 106,795
Commercial [Member]
Revenue		$ 62,330	$ 59,682
Revenue, percentage		58.00%	56.00%
Government & Defense [Member]
Revenue		$ 45,382	$ 47,113
Revenue, percentage		42.00%	44.00%
Battery & Energy Products Segment [Member]
Revenue	[1]	$ 91,907	$ 83,996
Battery & Energy Products Segment [Member] | Commercial [Member]
Revenue		62,330	59,682
Battery & Energy Products Segment [Member] | Government & Defense [Member]
Revenue		29,577	24,314
Communications Systems Segment [Member]
Revenue	[1]	15,805	22,799
Communications Systems Segment [Member] | Commercial [Member]
Revenue		0	0
Communications Systems Segment [Member] | Government & Defense [Member]
Revenue		$ 15,805	$ 22,799
[1]	Sales classified to U.S. include shipments to U.S.-based prime contractors which in some cases may serve non-U.S. projects.

Note 11 - Business Segment In_6

Note 11 - Business Segment Information - Domestic and International Revenue by Segment (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Revenue	[1]	$ 107,712	$ 106,795
UNITED STATES
Revenue	[1]	$ 62,255	$ 63,375
Revenue, percentage	[1]	58.00%	59.00%
Non-US [Member]
Revenue	[1]	$ 45,457	$ 43,420
Revenue, percentage	[1]	42.00%	41.00%
Battery & Energy Products Segment [Member]
Revenue	[1]	$ 91,907	$ 83,996
Battery & Energy Products Segment [Member] | UNITED STATES
Revenue	[1]	49,930	42,224
Battery & Energy Products Segment [Member] | Non-US [Member]
Revenue	[1]	41,977	41,772
Communications Systems Segment [Member]
Revenue	[1]	15,805	22,799
Communications Systems Segment [Member] | UNITED STATES
Revenue	[1]	12,325	21,151
Communications Systems Segment [Member] | Non-US [Member]
Revenue	[1]	$ 3,480	$ 1,648
[1]	Sales classified to U.S. include shipments to U.S.-based prime contractors which in some cases may serve non-U.S. projects.