Bel Fuse (BELFB) 10-K 11 Mar 24 2023 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2023	Mar. 01, 2024	Jun. 30, 2023
Document Information [Line Items]
Entity Central Index Key	0000729580
Entity Registrant Name	BEL FUSE INC /NJ
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2023
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Document Transition Report	false
Entity File Number	000-11676
Entity Incorporation, State or Country Code	NJ
Entity Tax Identification Number	22-1463699
Entity Address, Address Line One	300 Executive Drive, Suite 300
Entity Address, City or Town	West Orange
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	07052
City Area Code	201
Local Phone Number	432-0463
Entity Well-known Seasoned Issuer	Yes
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
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 696,100,000
Auditor Firm ID	248
Auditor Name	GRANT THORNTON LLP
Auditor Location	Iselin, New Jersey
Common Class B [Member]
Document Information [Line Items]
Title of 12(b) Security	Class B Common Stock ($0.10 par value)
Trading Symbol	BELFB
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		10,615,662
Common Class A [Member]
Document Information [Line Items]
Title of 12(b) Security	Class A Common Stock ($0.10 par value)
Trading Symbol	BELFA
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		2,141,011

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 89,371	$ 70,266
Held to maturity U.S. Treasury securities	37,548	0
Accounts receivable, net of allowance of $1,388 and $1,552, at December 31, 2023 and 2022, respectively	84,129	107,274
Inventories	136,540	172,465
Unbilled receivables	12,793	18,244
Other current assets	21,097	13,159
Total current assets	381,478	381,408
Property, plant and equipment, net	36,533	36,833
Right-of-use assets	20,481	21,551
Equity method investment	10,282	0
Intangible assets, net	49,391	54,111
Goodwill, net	26,642	25,099
Deferred income taxes	11,553	7,281
Other assets	33,119	34,183
Total assets	571,631	560,466
Current liabilities:
Accounts payable	40,441	64,589
Accrued expenses	54,657	50,873
Operating lease liability, current	6,350	5,870
Other current liabilities	9,161	14,972
Total current liabilities	110,609	136,304
Long-term liabilities:
Long-term debt	60,000	95,000
Operating lease liability, long-term	14,212	15,742
Liability for uncertain tax positions	19,823	24,798
Minimum pension obligation and unfunded pension liability	19,876	18,522
Deferred income taxes	1,456	1,257
Other long-term liabilities	5,097	6,497
Total liabilities	231,073	298,120
Commitments and contingencies (see Note 19)
Stockholders' equity:
Preferred stock, no par value, 1,000,000 shares authorized; none issued	0	0
Treasury stock (unrestricted, consisting of 3,323 Class A shares and 17,342 Class B shares)	(454)	(349)
Additional paid-in capital	44,260	40,772
Retained earnings	307,510	237,188
Accumulated other comprehensive loss	(12,037)	(16,546)
Total stockholders' equity	340,558	262,346
Total liabilities and stockholders' equity	571,631	560,466
Common Class A [Member]
Stockholders' equity:
Common Stock	214	214
Common Class B [Member]
Stockholders' equity:
Common Stock	1,065	1,067
Related Party [Member]
Current assets:
Related-party note receivable	$ 2,152	$ 0

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accounts receivable, allowance for doubtful accounts	$ 1,388	$ 1,552
Preferred stock, no par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Common Class A [Member]
Common stock, par value (in dollars per share)	$ 0.1	$ 0.1
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares outstanding (in shares)	2,141,589	2,141,589
Common stock, treasury shares (in shares)	3,323	3,323
Common Class A [Member] | Restricted Stock [Member]
Common stock, treasury shares (in shares)	1,072,769	1,072,769
Common Class B [Member]
Common stock, par value (in dollars per share)	$ 0.1	$ 0.1
Common stock, shares authorized (in shares)	30,000,000	30,000,000
Common stock, shares outstanding (in shares)	10,620,260	10,642,760
Common stock, treasury shares (in shares)	17,342	17,342
Common Class B [Member] | Restricted Stock [Member]
Common stock, treasury shares (in shares)	3,218,307	3,218,307

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Net sales	$ 639,813	$ 654,233
Cost of sales	423,964	470,780
Gross profit	215,849	183,453
Research and development costs	22,487	20,238
Selling, general and administrative expenses	99,091	92,342
Restructuring charges	10,114	7,322
Gain on sale of properties	(3,819)	(1,596)
Income from operations	87,976	65,147
Gain on sale of Czech Republic business	980	0
Interest expense	(2,850)	(3,379)
Other income/expense, net	(2,806)	(2,709)
Earnings before provision for income taxes	83,300	59,059
Provision for income taxes	9,469	6,370
Net earnings available to common shareholders	73,831	52,689
Common Class A [Member]
Net earnings available to common shareholders	$ 11,830	$ 8,598
Net earnings per common share:
Net earnings per common share - basic and diluted (in dollars per share)	$ 5.52	$ 4.01
Weighted-average shares outstanding:
Weighted-average number of shares outstanding - basic and diluted (in shares)	2,142	2,143
Common Class B [Member]
Net earnings available to common shareholders	$ 62,001	$ 44,091
Net earnings per common share:
Net earnings per common share - basic and diluted (in dollars per share)	$ 5.83	$ 4.24
Weighted-average shares outstanding:
Weighted-average number of shares outstanding - basic and diluted (in shares)	10,634	10,394

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Net earnings	$ 73,831	$ 52,689
Other comprehensive income:
Currency translation adjustment, net of taxes of ($93) and ($47)	6,684	(8,196)
Unrealized (losses) gains on interest rate swap cash flow hedge, net of taxes of $0 in both periods	(1,579)	5,655
Unrealized holding gains (losses) on marketable securities arising during the period, net of taxes of $0 in both periods	1	(11)
Change in unfunded SERP liability, net of taxes of ($161) and ($1,381)	(597)	4,869
Net current period other comprehensive income (loss)	4,509	2,317
Comprehensive income	$ 78,340	$ 55,006

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Foreign currency translation adjustment, tax expense	$ 93	$ 47
Unrealized gains (losses) on interest rate swap cash flow hedge, tax	0	0
Unrealized holding losses on marketable securities arising during the period, tax	0	0
Change in unfunded SERP liability, tax	$ (161)	$ (1,381)

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Class A [Member] Retained Earnings [Member]	Common Class A [Member] AOCI Attributable to Parent [Member]	Common Class A [Member] Common Stock, Common Class A [Member]	Common Class A [Member] Common Stock, Common Class B [Member]	Common Class A [Member] Treasury Stock, Common [Member]	Common Class A [Member] Additional Paid-in Capital [Member]	Common Class A [Member]	Common Class B [Member] Retained Earnings [Member]	Common Class B [Member] AOCI Attributable to Parent [Member]	Common Class B [Member] Common Stock, Common Class A [Member]	Common Class B [Member] Common Stock, Common Class B [Member]	Common Class B [Member] Treasury Stock, Common [Member]	Common Class B [Member] Additional Paid-in Capital [Member]	Common Class B [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Common Stock, Common Class A [Member]	Common Stock, Common Class B [Member]	Treasury Stock, Common [Member]	Additional Paid-in Capital [Member]	Total
Balance at Dec. 31, 2021															$ 187,935	$ (18,863)	$ 214	$ 1,038	$ 0	$ 38,419	$ 208,743
Net earnings							$ 8,598							$ 44,091	52,689	0	0	0	0	0	52,689
Cash dividends declared on common stock	$ (514)	$ 0	$ 0	$ 0	$ 0	$ 0	(514)	$ (2,922)	$ 0	$ 0	$ 0	$ 0	$ 0	(2,922)
Issuance of restricted common stock															0	0	0	33	0	(33)	0
Forfeiture of restricted common stock															0	0	0	(4)	0		0
Forfeiture of restricted common stock, APIC																				4
Repurchase of treasury stock															0	0	0	0	(349)	0	(349)
Foreign currency translation adjustment, net of taxes															0	(8,196)	0	0	0	0	(8,196)
Unrealized gains on interest rate swap cash flow hedge, net of taxes of $0															0	5,655	0	0	0	0	5,655
Unrealized holding losses on marketable securities, net of taxes of $0															0	(11)	0	0	0	0	(11)
Stock-based compensation expense															0	0	0	0	0	2,382	2,382
Change in unfunded SERP liability, net of taxes															0	4,869	0	0	0	0	4,869
Balance at Dec. 31, 2022															237,188	(16,546)	214	1,067	(349)	40,772	262,346
Net earnings							11,830							62,001	73,831	0	0	0	0	0	73,831
Cash dividends declared on common stock	$ (512)	$ 0	$ 0	$ 0	$ 0	$ 0	$ (512)	$ (2,997)	$ 0	$ 0	$ 0	$ 0	$ 0	$ (2,997)
Issuance of restricted common stock															0	0	0	1	0	(1)	0
Forfeiture of restricted common stock															0	0	0	(3)	0		0
Forfeiture of restricted common stock, APIC																				3
Repurchase of treasury stock															0	0	0	0	(105)	0	(105)
Foreign currency translation adjustment, net of taxes															0	6,684	0	0	0	0	6,684
Unrealized gains on interest rate swap cash flow hedge, net of taxes of $0															0	(1,579)	0	0	0	0	(1,579)
Unrealized holding losses on marketable securities, net of taxes of $0															0	1	0	0	0	0	1
Stock-based compensation expense															0	0	0	0	0	3,486	3,486
Change in unfunded SERP liability, net of taxes															0	(597)	0	0	0	0	(597)
Balance at Dec. 31, 2023															$ 307,510	$ (12,037)	$ 214	$ 1,065	$ (454)	$ 44,260	$ 340,558

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parentheticals) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares
Common Class A [Member]
Dividends declared (in dollars per share) | $ / shares	$ 0.24
Common Class B [Member]
Dividends declared (in dollars per share) | $ / shares	$ 0.28
Foreign currency translation adjustment, tax expense	$ (93)
Unrealized losses on interest rate swap cash flow hedge, tax	0
Unrealized holding losses on marketable securities arising during the period, tax	0
Change in unfunded SERP liability, tax	(161)
Foreign currency translation adjustment, liquidation of subsidiary	$ 2,724

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net earnings	$ 73,831	$ 52,689
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	13,312	14,863
Stock-based compensation	3,486	2,382
Amortization of deferred financing costs	33	34
Deferred income taxes	(3,872)	(4,594)
Unrealized losses (gains) on foreign currency revaluation	1,356	(278)
Gains on sale/disposal of property, plant and equipment	(2,117)	(1,596)
Gain on sale of Czech Republic business	(980)	0
Other, net	(1,037)	1,195
Changes in operating assets and liabilities:
Accounts receivable	22,500	(20,702)
Unbilled receivables	5,451	10,031
Inventories	33,613	(36,592)
Other current assets	(217)	(1,210)
Other assets	2,971	7,000
Accounts payable	(22,745)	1,522
Accrued expenses	5,356	10,933
Accrued restructuring costs	(1,228)	6,784
Other liabilities	(16,388)	(4,162)
Income taxes payable	(4,976)	1,958
Net cash provided by operating activities	108,349	40,257
Cash flows from investing activities:
Purchase of property, plant and equipment	(12,126)	(8,832)
Purchases of held to maturity and marketable securities	(59,992)	0
Proceeds from held to maturity securities	19,918	0
Payment for equity method investment	(10,282)	0
Investment in related party notes receivable	(2,152)	0
Proceeds from disposal/sale of property, plant and equipment	6,036	1,833
Proceeds from sale of business	5,063	0
Net cash used in investing activities	(53,535)	(6,999)
Cash flows from financing activities:
Dividends paid to common shareholders	(3,492)	(3,413)
Purchase of treasury stock	(105)	(349)
Borrowings under revolving credit line	5,000	0
Repayments under revolving credit line	(40,000)	(17,500)
Net cash used in financing activities	(38,597)	(21,262)
Effect of exchange rate changes on cash	2,888	(3,486)
Net increase in cash and cash equivalents	19,105	8,510
Cash and cash equivalents - beginning of year	70,266	61,756
Cash and cash equivalents - end of year	89,371	70,266
Supplemental cash flow information:
Income taxes, net of refunds received	25,056	14,618
Interest payments	4,729	3,371
ROU assets obtained in exchange for lease obligations	$ 5,999	$ 8,052

Note 1 - Description of Busines

Note 1 - Description of Business and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Basis of Presentation and Significant Accounting Policies [Text Block]	1. DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Bel Fuse Inc. and subsidiaries ("Bel," the "Company," "we," "us," and "our") design, manufacture and market a broad array of products that power, protect and connect electronic circuits. These products are used around the world, primarily in the networking, telecommunications, computing, general industrial, high-speed data transmission, military, commercial aerospace, transportation and eMobility industries. Bel's portfolio of products also finds application in the automotive, medical, broadcasting and consumer electronics markets. We manage our operations by product group through our reportable operating segments, Power Solutions and Protection, Connectivity Solutions and Magnetic Solutions. All amounts included in the tables to these notes to consolidated financial statements, except per share amounts, are in thousands. Principles of Consolidation Estimates and Uncertainties not not may Cash, Cash Equivalents and Investments original maturity of three $250,000. The Company has held to maturity securities comprised of U.S. Treasury Bills. These investments are classified as held to maturity as the Company has the intent and ability to hold these investments until they mature. The held to maturity securities mature within the next 12 December 31, 2023: Amortized Cost Gross Unrealized Gain Fair Value Held to maturity U.S. Treasury securities $ 37,548 $ 103 $ 37,651 In determining the fair value of the Company's held to maturity U.S. Treasury securities, the Company utilized Level 1 December 31 2023. Allowance for Credit Losses not not not no may no 2023 2022. Effects of Foreign Currency not loss of $1.4 million for the year ended December 31, 2023 and a gain of $0.3 million for the year ended December 31, 2022 , which were included in other expense, net on the consolidated statements of operations. Concentration of Credit Risk ation of the customer's financial condition, without requiring collateral. Exposure to losses on receivables is principally dependent on each customer's financial condition. We control our exposure to credit risk through credit approvals, credit limits and monitoring procedures and establish allowances for anticipated losses. See Note 14, "Segments, " Inventories cost or net realizable value. Revenue Recognition Product Warranties one three See Note 12, "Accrued Expenses." Product Returns not not may may may Goodwill and Identifiable Intangible Assets 1 2 3 Identifiable intangible assets consist primarily of patents, licenses, trademarks, trade names, customer lists and relationships, non-compete agreements and technology-based intangibles and other contractual agreements. We amortize finite-lived identifiable intangible assets over the shorter of their stated or statutory duration or their estimated useful lives, ranging from 1 to 16 years, on a straight-line basis to their estimated residual values and periodically review them for impairment. Total identifiable intangible assets comprise 8.6% a December 31, 2023 2022 We use the acquisition method of accounting for those business combinations in which we acquire 100% not fourth Impairment and Disposal of Long-Lived Assets December 31, 2023, no December 31, 2023. For indefinite-lived intangible assets, such as goodwill, trademarks and trade names, each year and whenever impairment indicators are present, we determine the fair value of the asset and record an impairment loss for the excess of book value over the fair value, if any. In addition, in all cases of an impairment review we re-evaluate whether continuing to characterize the asset as indefinite-lived is appropriate. See Note 5, "Goodwill and Other Intangible Assets," for additional details. Depreciation fro m 1 to 33 years for buildings and leasehold improvements, and from 3 to 14 years for m achinery and equipment. Derivative Financial Instruments not The Company records all derivatives as assets or liabilities on our consolidated balance sheets at their fair values. Gains and losses from the changes in values of these derivatives are accounted for based on the use of the derivative and whether it qualifies for hedge accounting. The Company's interest rate swaps and foreign currency forward contracts related to the Chinese renminbi (both further described in Note 13, "Derivative Instruments and Hedging Activities" ) have been designated as cash flow hedges and as such, gains/losses are recorded in accumulated other comprehensive income until such time the hedged item affects earnings. The counterparties to our derivative financial instruments consist of several major international financial institutions. We regularly monitor the financial strength of these institutions. While the counterparties to these contracts expose us to the potential risk of credit-related losses in the event of a counterparty’s non-performance, the risk would be limited to the unrealized gains on such affected contracts. Income Taxes - We account for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the consolidated financial statements. Under this method, deferred tax assets and liabilities are determined based on the differences between the financial statement and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date. See Note 10, “Income Taxes”. not not not may may not Earnings per Share two two two There were no potential common shares outstanding during the years ended December 31, 2023 2022 which would have had a dilutive effect on earnings per share. The earnings and weighted average shares outstanding used in the computation of basic and diluted earnings per share are as follows: Years Ended December 31, 2023 2022 Numerator: Net earnings $ 73,831 $ 52,689 Less dividends declared: Class A 512 514 Class B 2,997 2,922 Undistributed earnings $ 70,322 $ 49,253 Undistributed earnings allocation: Class A undistributed earnings $ 11,318 $ 8,084 Class B undistributed earnings 59,004 41,169 Total undistributed earnings $ 70,322 $ 49,253 Net earnings allocation: Class A net earnings $ 11,830 $ 8,598 Class B net earnings 62,001 44,091 Net earnings $ 73,831 $ 52,689 Denominator: Weighted average shares outstanding: Class A 2,142 2,143 Class B 10,634 10,394 Net earnings per share: Class A $ 5.52 $ 4.01 Class B $ 5.83 $ 4.24 Research and Development ("R&D") December 31, 2023 2022 $22.5 million Fair Value Measurements three Level 1 Level 2 Level 3 no For financial instruments such as cash and cash equivalents, accounts receivable, accounts payable and accrued expenses, the carrying amount approximates fair value because of the short maturities of such instruments. See Note 6, "Fair Value Measurements," Recently Issued Accounting Standards Recently Adopted Accounting Standards In March 2020, 2020 04, Reference Rate Reform (Topic 848 2020 04 January 2021, 2021 01, 848 December 31, 2022. December 2022, 2022 06, Reference Rate Reform (Topic 848 848 December 31, 2024. January 2023, January 31, 2023. 2020 04 first 2023 not In June 2016, 2016 13, Financial Instruments Credit Losses (Topic 326 , January 1, 2023, 2016 13. not Accounting Standards Issued But Not In November 2023, 2023 07, Segment Reporting (Topic 280 not December 15, 2023, December 15, 2024, no In December 2023, 2023 09, Income Taxes (Topic 740 2023 09 5% December 15, 2024, may December 31, 2025 may no

Note 2 - Investment in Innolect

Note 2 - Investment in Innolectric	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Investment [Text Block]	2. INVESTMENT IN INNOLECTRIC On February 1, 2023, one third €8.0 February 2023 February 2023 one third This passive investment creates a strategic alliance that is focused on Electric Vehicles (“EV”) on-board power electronics, and in particular next generation fast-charging technology. With no not December 31, 2023. one Related Party Transactions From time to time, the Company provides cash loans to innolectric to fund working capital needs and further business development. During 2023, €2.0 December 31, 2023 December 31, 2023.

Note 3 - Divestiture of Subsidi

Note 3 - Divestiture of Subsidiary	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	3. DIVESTITURE OF SUBSIDIARY On June 1, 2023, The carrying amounts of the major classes of assets and liabilities included as part of the sale were as follows: Total Cash and cash equivalents $ 2,072 Accounts receivable 1,030 Inventories 1,310 Property, plant and equipment 326 Other assets 48 Accounts payable (441 ) Accrued expenses (126 ) Income taxes payable (100 ) Other current liabilities (13 ) Other long-term liabilities (23 ) Total net assets transferred 4,083 Consideration received 5,063 Gain on sale recognized $ 980

Note 4 - Revenue

Note 4 - Revenue	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	4. REVENUE Nature of Goods and Services Our revenues are substantially derived from sales of our products. In our Power Solutions and Protection product group, we provide AC/DC and DC/DC power conversion devices and circuit protection products. Applications range from board-mount power to system-level architectures for servers, storage, networking, industrial and transportation. In our Connectivity Solutions product group, we provide connectors and cable assemblies to the aerospace, military/defense, commercial, rugged harsh environment and communication markets. This group also includes passive jacks, plugs and cable assemblies that provide connectivity in networking equipment, as well as modular plugs and cable assemblies used within the structured cabling system, known as premise wiring. In our Magnetic Solutions product group, we provide an extensive line of integrated connector modules (ICM), where an Ethernet magnetic solution is integrated into a connector package. Products within the Company's Magnetic Solutions group are primarily used in networking and industrial applications. The Company also provides incremental services to our customers in the form of training, technical support, special tooling, and other support as deemed necessary from time to time. For purposes of ASC 606, Types of Contracts Substantially all of the Company's revenue is derived from contracts with its customers under one • Direct with customer: e.g., • Distributor: • Customer-Designated Hub Arrangements: not not 1, "Description of Business and Summary of Significant Accounting Policies - Product Warranties" 606, not • Licensing Agreements: third 30 Significant Payment Terms Contracts with customers indicate the general terms and conditions in which business will be conducted for a set period of time. Individual purchase orders state the description, quantity and price of each product purchased. Payment for products sold under direct contracts with customers or contracts with distributors is typically due in full within 30 90 60 30 Since the customer agrees to a stated price for each product on each purchase order, the majority of contracts are not Disaggregation of Revenue The following table provides information about disaggregated revenue by geographic region and sales channel, and includes a reconciliation of the disaggregated revenue to our reportable segments: Year Ended December 31, 2023 Power Solutions Connectivity Magnetic and Protection Solutions Solutions Consolidated By Geographic Region: North America $ 233,016 $ 172,518 $ 42,259 $ 447,793 Europe 57,567 32,689 8,263 98,519 Asia 23,522 5,365 64,614 93,501 $ 314,105 $ 210,572 $ 115,136 $ 639,813 By Sales Channel: Direct to customer $ 221,828 $ 130,893 $ 86,608 $ 439,329 Through distribution 92,277 79,679 28,528 200,484 $ 314,105 $ 210,572 $ 115,136 $ 639,813 Year Ended December 31, 2022 Power Solutions Connectivity Magnetic and Protection Solutions Solutions Consolidated By Geographic Region: North America $ 217,381 $ 141,585 $ 50,234 $ 409,200 Europe 42,121 35,596 10,903 88,620 Asia 28,864 9,904 117,645 156,413 $ 288,366 $ 187,085 $ 178,782 $ 654,233 By Sales Channel: Direct to customer $ 186,439 $ 112,128 $ 135,247 $ 433,814 Through distribution 101,927 74,957 43,535 220,419 $ 288,366 $ 187,085 $ 178,782 $ 654,233 Contract Assets and Contract Liabilities A contract asset results when goods or services have been transferred to the customer but payment is contingent upon a future event, other than passage of time. In the case of our customer-controlled hub arrangements, we are unable to invoice the customer until product is pulled from the hub by the customer, which generates an unbilled receivable (a contract asset) when revenue is initially recognized. A contract liability results when cash payments are received or due in advance of our performance obligation being met. We have certain customers who provide payment in advance of product being shipped, which results in deferred revenue (a contract liability). The balances of the Company's contract assets and contract liabilities at December 31, 2023 December 31, 2022 December 31, December 31, 2023 2022 Contract assets - current (unbilled receivables) $ 12,793 $ 18,244 Contract liabilities - current (deferred revenue) $ 3,046 $ 8,847 The change in balance of our unbilled receivables from December 31, 2022 December 31, 2023 A tabular presentation of the activity within the deferred revenue account for the year ended December 31, 2023 Year Ended December 31, 2023 Balance, January 1 $ 8,847 New advance payments received 4,121 Recognized as revenue during period (9,930 ) Currency translation 8 Balance, December 31 $ 3,046 Transaction Price Allocated to Future Obligations The aggregate amount of transaction price allocated to remaining performance obligations that have not December 31, 2023 one 2025 2026 . 2025, 2026 2026. not December 31, 2023 one

Note 5 - Goodwill and Other Int

Note 5 - Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Goodwill Disclosure [Text Block]	5. GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill Goodwill represents the excess of the purchase price and related acquisition costs over the fair value assigned to the net tangible and other intangible assets acquired in a business acquisition. At December 31, 2023 2022 • Power Solutions and Protection 2012 2014 2019 2021 2023 not • Connectivity Solutions : includes the 2010 2012 2013 2014 2021 not • Magnetic Solutions: includes the 2013 not The changes in the carrying value of goodwill classified by our segment reporting structure for the year ended December 31, 2023 Total Power Solutions & Protection Connectivity Solutions Magnetic Solutions Balance at January 1, 2023: Goodwill, gross $ 25,099 $ 18,152 $ 6,947 $ - Goodwill, net $ 25,099 $ 18,152 $ 6,947 $ - Foreign currency translation 1,543 471 1,072 - Balance at December 31, 2023: Goodwill, gross $ 26,642 $ 18,623 $ 8,019 $ - Goodwill, net $ 26,642 $ 18,623 $ 8,019 $ - The Company has accumulated impairment charges totaling $137.5 million, which were incurred under a former segment and reporting unit structure which was in place prior to October 1, 2019. As discussed in Note 6, Fair Value Measurements" , fourth may not may may 2023 On October 1, 2023, four We concluded that the fair value of the Company's Connectivity Europe, Power Europe, EOS and CUI reporting units exceeded the carrying value and that there was no October 1, 2023, 0 October 1, 2023 no The excess of estimated fair values over carrying value, including goodwill for each of our former reporting units that had goodwill as of the 2023 Reporting Unit % by Which Estimated Fair Value Exceeds Carrying Value Power Europe 89.1% Connectivity Europe 79.9% EOS 71.2% CUI 169.4% 2022 Impai The Company performed a qualitative assessment as of October 1, 2022 March 31, 2021. no October 1, 2022 On October 1, 2022, three no As noted above, the fair value determined in connection with the goodwill impairment test completed in the fourth 202 3 may ent test. The fair values of the assets and liabilities of the reporting unit, including the intangible assets, could vary depending on various factors. The future occurrence of a potential indicator of impairment, such as a decrease in expected net earnings, adverse equity market conditions, a decline in current market multiples, a sustained decrease in the price of our common stock, a significant adverse change in legal factors or business climates, an adverse action or assessment by a regulator, unanticipated competition, strategic decisions made in response to economic or competitive conditions, or a more-likely-than- not may Other Intangible Assets Other identifiable intangible assets include patents, technology, license agreements, non-compete agreements and trademarks. Amounts assigned to these intangible assets have been determined by management. Management considered a number of factors in determining the allocations, including valuations and independent appraisals. Trademarks have indefinite lives and are reviewed for impairment on an annual basis, or when there is a triggering event. Other intangible assets, excluding trademarks, are being amortized over 1 to 12 y The Company tests indefinite-lived intangible assets for impairment using a fair value approach, the relief-from-royalty method (a form of the income approach). At December 31, 2023 , the Company's indefinite-lived intangible assets related to the trademarks acquired in the CUI, Power Solutions, Connectivity Solutions, Cinch and Fibreco acquisitions. The components of definite and indefinite-lived intangible assets are as follows: December 31, 2023 December 31, 2022 Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Amount Amortization Amount Amount Amortization Amount Patents, licenses and technology $ 19,176 $ 11,386 $ 7,790 $ 38,607 $ 30,156 $ 8,451 Customer relationships 56,711 32,099 24,612 56,917 28,096 28,821 Non-compete agreements - - - 2,662 2,662 - Trademarks (indefinite-lived) 17,148 159 16,989 16,999 160 16,839 $ 93,035 $ 43,644 $ 49,391 $ 115,185 $ 61,074 $ 54,111 Amortization expense was $4.7 m 2023 2022 Estimated amortization expense for intangible assets for the next five December 31, Amortization Expense 2024 $ 4,563 2025 4,551 2026 4,551 2027 4,551 2028 4,551 2023 2022 The Company completed its annual indefinite-lived intangible assets impairment test as of October 1, 2023 October 1, 2022. December 31, 2023 and December 31, 2022 , with

Note 6 - Fair Value Measurement

Note 6 - Fair Value Measurements	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Fair Value Disclosures [Text Block]	6. FAIR VALUE MEASUREMENTS The following tables show the Company's cash, cash equivalents and other marketable and held to maturity securities by significant investment category as of December 31, 2023 2022: December 31, 2023 Carrying value Fair value Cash and cash equivalents Other Current Assets Cash $ 57,544 $ 57,544 $ 57,544 $ - Level 1: Money market funds 31,188 31,188 31,188 - Money market funds (Rabbi Trust) 303 303 - 303 Subtotal 31,491 31,491 31,188 303 Level 2: Certificates of deposit and time deposits 3,629 3,926 639 2,990 Subtotal 3,629 3,926 639 2,990 Total $ 92,664 $ 92,961 $ 89,371 $ 3,293 December 31, 2022 Carrying value Fair value Cash and cash equivalents Other Current Assets Cash $ 70,266 $ 70,266 $ 70,266 $ - Level 1: Money market funds (Rabbi Trust) 101 101 - 101 Subtotal 101 101 - 101 Total $ 70,367 $ 70,367 $ 70,266 $ 101 As of December 31, 2023 2022 1 $0.3 mi December 31, 2023 December 31, 2022 Throughout 2023 2022, $0.5 million December 31, 2023 $0.4 million a December 31, 2022 2 The Company is a party to two as further described in Note 13, "Derivative Instruments and Hedging Activities". $4.0 $5.5 m December 31, 2023 2022 The fair values of our derivative financial instruments (which are measured using Level 2 December 31, 2023 Balance Sheet Classification December 31, 2023 December 31, 2022 Derivative assets: Foreign currency forward contracts: Designated as cash flow hedges Other current assets $ - $ 359 Not designated as hedging instruments Other current assets 486 - Interest rate swap agreements: Designated as a cash flow hedge Other assets 3,960 5,539 Total derivative assets $ 4,446 $ 5,898 Derivative liabilities: Foreign currency forward contracts: Designated as cash flow hedges Other current liabilities $ 5 $ - Total derivative liabilities $ 5 $ - The Company does not 3, no 1, 2 3 2023 2022 no 2023 There were no financial assets accounted for at fair value on a nonrecurring basis as of December 31, 2023 December 31, 2022 The Company has other financial instruments, such as cash and cash equivalents, accounts receivable, accounts payable and accrued expenses, which are not December 31, 2023 2022 $60 millio $60 not December 31, 2023 Nonfinancial assets and liabilities, such as goodwill, indefinite-lived intangible assets and long-lived assets, are accounted for at fair value on a nonrecurring basis. These items are tested for impairment upon the occurrence of a triggering event or in the case of goodwill, on at least an annual basis. Se e Note 5, "Goodwill and Other Intangible Assets," for further information about goodwill and other indefinite-lived intangible assets.

Note 7 - Other Assets

Note 7 - Other Assets	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Other Assets Disclosure [Text Block]	7. OTHER ASSETS At December 31, 2023 2022 $19.5 mill December 31, 2023 2022 $15.4 Company-Owned Life Insurance Investments in company-owned life insurance policies ("COLI") were made with the intention of utilizing them as a long-term funding source for the Company's SERP obligations. However, the cash surrender value of the COLI does not $15.1 millio December 31, 2023 2022 income (expense) to increase (decrease) in $1.3 mil December 31, 2023 2022 Other Investments At December 31, 2023 2022 cost of $0.3 million and $0.1 mi December 31, 2023 2022 $0.3 million and $0.1 million, r

Note 8 - Inventories

Note 8 - Inventories	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Inventory Disclosure [Text Block]	8. INVENTORIES The components of inventories are as follows: December 31, 2023 2022 Raw materials $ 63,647 $ 74,572 Work in progress 42,038 44,397 Finished goods 30,855 53,496 Inventories $ 136,540 $ 172,465

Note 9 - Property, Plant and Eq

Note 9 - Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	9. PROPERTY, PLANT AND EQUIPMENT, NET Property, plant and equipment, net consist of the following: December 31, 2023 2022 Land $ 348 $ 1,098 Buildings and improvements 15,286 21,529 Machinery and equipment 98,527 118,358 Construction in progress 1,567 4,239 115,728 145,224 Accumulated depreciation (79,195 ) (108,391 ) Property, plant and equipment, net $ 36,533 $ 36,833 Depreciation expense for the years ended December 31, 2023 2022 $8.6 mil At December 31, 2023 and December 31, 2022 , a total of $1.3 million and $1.5 million, respectively, of property was classified as assets held for sale on the accompanying consolidated balance sheet related to several buildings in Zhongshan, PRC.

Note 10 - Income Taxes

Note 10 - Income Taxes	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Income Tax Disclosure [Text Block]	10. INCOME TAXES The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction and various states and foreign jurisdictions. The Company is no before 2020 2017. no ars before 2013 2015 At December 31, 2023 2022 $19.8 December 31, 2023 $3.5 million of the twelve A reconciliation of the beginning and ending amount of the liability for uncertain tax positions, including the portion included in income taxes payable, is as follows: Years Ended December 31, 2023 2022 Liability for uncertain tax positions - January 1 $ 24,798 $ 28,434 Additions based on tax positions related to the current year 973 1,284 Translation adjustment (249 ) (1,121 ) Settlement/expiration of statutes of limitations (5,699 ) (3,799 ) Liability for uncertain tax positions - December 31 $ 19,823 $ 24,798 The Company’s policy is to recognize interest and penalties related to uncertain tax positions as a component of the current provision for income taxes. During the years ended December 31, 2023 2022 $0.4 mill December 31, 2023 2022 $2.3 million and $ $2.0 m December 31, 2023 2022 The Company’s total earnings before provision for income taxes included losses from domestic operations of $51.5 million and $14.2 million for 2023 and 2022 , respectively, and earnings before provision for income taxes from foreign operations of $31.7 million and $44.8 million for 2023 and 2022 , respectivel The provision (benefit) for income taxes consists of the following: Years Ended December 31, 2023 2022 Current: Federal $ 11,403 $ 9,175 State 975 787 Foreign 963 1,002 13,341 10,964 Deferred: Federal (3,128 ) (4,064 ) State (139 ) (255 ) Foreign (605 ) (275 ) (3,872 ) (4,594 ) $ 9,469 $ 6,370 A reconciliation of taxes on income computed at the U.S. federal statutory rate to amounts provided is as follows: Years Ended December 31, 2023 2022 $ % $ % Tax provision computed at the federal statutory rate $ 17,493 21 % $ 12,402 21 % (Decrease) increase in taxes resulting from: Different tax rates applicable to foreign operations (1,697 ) (2 %) (1,677 ) (3 %) Reversal of liability for uncertain tax positions - net (4,726 ) (6 %) (2,515 ) (4 %) Research and experimentation and foreign tax credits (75 ) (0 %) (139 ) (0 %) State taxes, net of federal benefit (433 ) (1 %) 292 0 % SERP/COLI and restricted stock income (756 ) (1 %) 733 1 % Other, net (337 ) (0 %) (2,726 ) (5 %) Tax provision computed at the Company's effective tax rate $ 9,469 11 % $ 6,370 11 % As of December 31, 2023 $26.0 mill $15.1 million whi $4.0 million of d $0.6 $0.6 mi not not $2.0 g 2027 2042 2030 2042. Management has no December 31, 2023 $0.2 million have been reflected in the accompanying consolidated statements of operations for the year ended December 31, 2023 . Due to the practicality of determining the deferred taxes on outside basis differences in our investments in our foreign subsidiaries, we have not Components of deferred income tax assets and liabilities are as follows: December 31, 2023 2022 Tax Effect Tax Effect Deferred tax assets: State tax credits $ 424 $ 571 Unfunded pension liability (255 ) (416 ) Reserves and accruals 4,504 4,947 Federal, state and foreign net operating loss and credit carryforwards 4,303 4,316 Depreciation 435 437 Amortization 6,004 2,968 Lease accounting 4,605 4,816 Other accruals 5,997 6,486 Total deferred tax assets 26,017 24,125 Deferred tax liabilities: Depreciation 2,331 2,227 Amortization 6,359 6,178 Lease accounting 4,659 4,889 Other accruals 562 780 Total deferred tax liabilities 13,911 14,074 Valuation allowance 2,009 4,027 Net deferred tax assets $ 10,097 $ 6,024

Note 11 - Debt

Note 11 - Debt	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Debt Disclosure [Text Block]	11. DEBT The Company has a Credit and Security Agreement with KeyBank National Association (as amended, the "credit agreement" or the "CSA"). The CSA provides a $175 million 5-year senior secured revolving credit facility ("revolver"), with a sublimit of up to $10 million available for letters of credit and a sublimit of up to $5 million available for swing line loans. Revolving loans borrowed under the CSA mature on September 1, 2026. December 31, 2023 2022 $60 $115 m December 31, 2023 December 31, 2022 $2.9 mi December 31, 2023 2022 2021 January 2023, 2021 January 31, 2023 . The interest rate in effect at December 31, 2023 December 31, 2022 December 31, 2022 December 31, 2022, December 31, 2023. 13, "Derivative Instruments and Hedging Activities" 2021 January 31, 2023, 2021 January 31, 2023, 2021 one January 31, 2023, Note 1, Accounting Policies" 2021 2021 December 31, 2023 December 31, 2022. Under the terms of its credit agreement, the Company is entitled, subject to the satisfaction of certain conditions, to request additional commitments under the revolver or the addition of a term loan facility in the aggregate principal amount of up to $100 million for all such increases (revolver and term) to the extent that existing or new lenders agree to provide such additional commitments and/or term loans. In addition to requesting loans denominated in U.S. dollars, the credit agreement provides that up to a U.S. Dollar equivalent principal amount of $15 million of the revolver may In connection with the credit agreement, the Company and certain of the Company’s material U.S. subsidiaries (together with the Company, the “Loan Parties”) provided to the administrative agent, for the benefit of the lenders, guaranty of payment. As a result, the obligations of the Company under the credit agreement are guaranteed by the Loan Parties’ material U.S. subsidiaries, and secured by a first The borrowings under the credit agreement bear interest, generally payable quarterly, at a rate equal to, at the Company's option, either ( 1 2 one January 12, 2023, Revolving loans borrowed under the credit agreement mature on September 1, 2026, The credit agreement contains customary representations and warranties, covenants and events of default. In addition, the credit agreement contains financial covenants that measure (i) the ratio of the Company’s total funded indebtedness, on a consolidated basis, less the aggregate amount of all unencumbered cash and cash equivalents, to the amount of the Company’s consolidated EBITDA (“Leverage Ratio”) and (ii) the ratio of the amount of the Company’s consolidated EBITDA to the Company’s consolidated fixed charges (“Fixed Charge Coverage Ratio”). If an event of default occurs, the lenders under the credit agreement would be entitled to take various actions, including the acceleration of amounts due thereunder and all actions permitted to be taken by a secured creditor. At December 31, 2023 he Fixed Charge Coverage Ratio. Scheduled principal payments of the total debt outstanding at December 31, 2023 2024 $ - 2025 - 2026 60,000 2027 - 2028 - Total long-term debt 60,000 Less: Current maturities of long-term debt - Noncurrent portion of long-term debt $ 60,000

Note 12 - Accrued Expenses

Note 12 - Accrued Expenses	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Accounts Payable and Accrued Liabilities Disclosure [Text Block]	12. ACCRUED EXPENSES Accrued expenses consist of the following: December 31, 2023 2022 Salaries, bonuses and related benefits $ 33,566 $ 27,422 Deferred revenue 3,046 8,847 Accrued restructuring costs 5,498 6,796 Sales commissions 2,347 2,521 Subcontracting labor 1,622 1,875 Warranty accrual 1,542 1,287 Other 7,036 2,125 $ 54,657 $ 50,873 The change in warranty accrual during 2023 no 2023 Restructuring Activities Activity and liability balances related t December 31, 2023 are as follows: Year Ended December 31, 2023 Liability at Cash Payments Liability at December 31, New and Other December 31, 2022 Charges Settlements 2023 Severance costs $ 3,390 $ 7,590 $ (9,429 ) $ 1,551 Disposal of equipment in connection with restructuring - 1,320 (1,320 ) - Other restructuring costs 3,406 1,204 (663 ) 3,947 Total $ 6,796 $ 10,114 $ (11,412 ) $ 5,498 During the third 2022, fourth 2023, two first 2023, December 31, 2023, December 31, 2023, December 31, 2023,

Note 13 - Derivative Instrument

Note 13 - Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Derivative Instruments and Hedging Activities Disclosure [Text Block]	13. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Our primary objective for holding derivative financial instruments is to manage foreign currency exchange rate risk and interest rate risk, when deemed appropriate. We enter into these contracts in the normal course of business to mitigate risks and not Foreign Currency Forward Contracts Under our risk management strategy, we periodically use foreign currency forward contracts to manage our short-term exposures to fluctuations in operational cash flows resulting from changes in foreign currency exchange rates. These cash flow exposures result from portions of our forecasted operating expenses, primarily compensation and related expenses, which are transacted in currencies other than the U.S. dollar, most notably the Chinese renminbi and the Mexican peso. These foreign currency forward contracts generally have maturities of no twelve twelve We held outstanding foreign currency forward contracts with notional amounts of $25.8 m $25.7 December 31, 2023 2022 Interest Rate Swap Agreements To partially mitigate risks associated with the variable interest rates on the revolver borrowings under its credit agreement, the Company is a party to a pay-fixed, receive-variable interest rate swap agreement with each of two January 31, 2023, ( interest at a fixed rate of 1.3055% and received variable interest of one one $30.0 “2021 2021 December 31, 2021, January 31, 2022 2021 August 31, 2026. January 2023, two January 31, 2023 January 31, 2023, 2021 The 2021 Fair Values of Derivative Financial Instruments See Note 6, Fair Value Measurements" December 31, 2023 2022. Derivative Financial Instruments in Cash Flow Hedging Relationships The effects of derivative financial instruments designated as cash flow hedges on AOCL and on the consolidated statements of operations for the years ended December 31, 2023 2022 Years Ended December 31, 2023 2022 Net (losses) gains recognized in AOCL: Foreign currency forward contracts $ (1,470 ) $ (119 ) Interest rate swap agreements 689 5,886 $ (781 ) $ 5,767 Net (losses) gains reclassified from AOCL to the consolidated statement of operations: Foreign currency forward contracts $ (537 ) $ (805 ) Interest rate swap agreements 2,268 230 $ 1,731 $ (575 ) T he losses related to the foreign currency forward contracts are in December 31, 2023 2022 Derivative Financial Instruments Not Gains recognized on derivative financial instruments not December 31, 2023 and 2022 were as follows: Years Ended December 31, Classification in Consolidated Statements of Operations 2023 2022 Foreign currency forward contracts Other expense, net 150 58 $ 150 $ 58

Note 14 - Segments

Note 14 - Segments	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	14. SEGMENTS The Company operates in one three three Year Ended December 31, 2023 Power Solutions and Protection Connectivity Solutions Magnetic Solutions Corporate/ Other Total Net sales $ 314,105 $ 210,572 $ 115,136 $ - $ 639,813 Gross Profit 119,741 72,031 25,314 (1,237 ) 215,849 Gross Profit % 38.1 % 34.2 % 22.0 % nm 33.7 % Total Assets 222,068 197,045 47,900 104,618 571,631 Capital Expenditures 4,563 7,384 160 19 12,126 Depreciation and Amortization Expense 5,280 6,152 1,094 786 13,312 Year Ended December 31, 2022 Power Solutions and Protection Connectivity Solutions Magnetic Solutions Corporate/ Other Total Net sales $ 288,366 $ 187,085 $ 178,782 $ - $ 654,233 Gross Profit 87,840 48,488 49,290 (2,165 ) 183,453 Gross Profit % 30.5 % 25.9 % 27.6 % nm 28.0 % Total Assets 234,095 170,895 107,891 47,585 560,466 Capital Expenditures 3,916 4,566 350 - 8,832 Depreciation and Amortization Expense 6,470 6,145 2,133 115 14,863 Entity-Wide Information The following is a summary of entity-wide information related to the Company's net sales to external customers by geographic area and by major product line. Years Ended December 31, 2023 2022 Net Sales by Geographic Location: United States $ 447,793 $ 409,199 People's Republic of China 43,109 77,061 Macao 35,026 61,744 United Kingdom 25,648 21,903 Slovakia 35,555 22,120 Germany 17,327 24,112 India 15,365 17,608 Switzerland 11,237 9,893 All other foreign countries 8,753 10,593 Consolidated net sales $ 639,813 $ 654,233 Net Sales by Major Product Line: Power solutions and protection $ 314,105 $ 288,366 Connectivity solutions 210,572 187,085 Magnetic solutions 115,136 178,782 Consolidated net sales $ 639,813 $ 654,233 The following is a summary of long-lived assets by geographic area as of December 31, 2023 2022 December 31, 2023 2022 Long-lived Assets by Geographic Location: United States $ 34,990 $ 33,875 People's Republic of China (PRC) 23,621 28,222 Slovakia 7,468 6,738 United Kingdom 3,024 1,109 All other foreign countries 549 1,072 Consolidated long-lived assets $ 69,652 $ 71,016 Long-lived assets consist of property, plant and equipment, net and other assets of the Company that are identified with the operations of each geographic area. The territory of Hong Kong became a Special Administrative Region ("SAR") of the PRC in the middle of 1997. 1999. 21.6% Net Sales to Major Customers The Company had no ten 2023 2022, one

Note 15 - Retirement Fund and P

Note 15 - Retirement Fund and Profit Sharing Plan	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Retirement Benefits [Text Block]	15. RETIREMENT FUND AND PROFIT SHARING PLAN The Company maintains the Bel Fuse Inc. Employees' Savings Plan, a defined contribution plan that is intended to meet the applicable requirements for tax-qualification under sections 401 1986, first 1% 5% January 1, 2012, December 31, 2023 2022 $1.3 mi December 31, 2023 approximately shares a The Company also maintains a Nonqualified Deferred Compensation Plan (the "DCP"). With certain exceptions, the Company's contributions to the DCP are discretionary and become fully vested by the participants upon reaching age 65. The expense for the years ended December 31, 2023 2022 $0.1 f $1.0 m December 31, 2023 December 31, 2022 The Company's subsidiaries in Asia have a retirement fund covering substantially all of their Hong Kong based full-time employees. Eligible employees contribute up to 5% of salary to the fund. In addition, the Company must contribute a minimum of 5% of eligible salary, as determined by Hong Kong government regulations. The Company currently contributes 7% of eligible salary in cash. The expense for the years ended December 31, 2023 2022 $1.5 m December 31, 2022 3,323 and 17,342 sh second 2022, December 31, 2023 The Company maintains a SERP, which is designed to provide a limited group of key management and other key employees of the Company with supplemental retirement and death benefits. Participants in the SERP are selected by the Compensation Committee of the Board of Directors. The SERP initially became effective in 2002 April 2007 409A Note 7, Other Assets ," for further information on these assets. The benefits available under the SERP vary according to when and how the participant terminates employment with the Company. If a participant retires (with the prior written consent of the Company) on his normal retirement date ( 65 20 5 five 55 20 five 65, 120 60 one four December 31, 2023 2022 $1.3 million an Net Periodic Benefit Cost December 31, 2023 2022 Years Ended December 31, 2023 2022 Service Cost $ 369 $ 503 Interest Cost 886 636 Net amortization 71 312 Net periodic benefit cost $ 1,326 $ 1,451 The service cost component of net benefit cost is presented within cost of sales or selling, general and administrative expense on the accompanying consolidated statements of operations, in accordance with where compensation cost for the related associate is reported. All other components of net benefit cost, including interest cost and net amortization noted above, are presented within other income/expense, net in the accompanying consolidated statements of operations. Obligations and Funded Status December 31, 2023 2022 Years Ended December 31, 2023 2022 Fair value of plan assets, January 1 $ - $ - Company contributions 775 606 Benefits paid (775 ) (606 ) Fair value of plan assets, December 31 $ - $ - Benefit obligation, January 1 $ 18,175 $ 23,580 Service cost 370 503 Interest cost 886 636 Benefits paid (775 ) (606 ) Actuarial loss (gain) 828 (5,938 ) Benefit obligation, December 31 $ 19,484 $ 18,175 Underfunded status, December 31 $ (19,484 ) $ (18,175 ) The Company has recorded the 2023 2022 $18.1 mi December 31, 2023 December 31, 2022 $15.4 million and $14.0 million at December 31, 2023 2022 , respectively. See Note 7, Other Assets, " for additional information on these investment The estimated net loss and prior service cost for the SERP that will be amortized from accumulated other comprehensive loss into net periodic benefit cost over the next fiscal year is $0.1 $0.8 million to the SERP in 2024. no not 2024 , as the plan has no The following benefit payments, which reflect expected future service, are expected to be paid: Years Ending December 31, 2024 $ 972 2025 1,015 2026 1,033 2027 1,150 2028 1,321 2029 - 2033 7,218 The following gross amounts are recognized net of tax in accumulated other comprehensive loss: December 31, 2023 2022 Prior service cost $ 212 $ 334 Net loss (1,336 ) (2,216 ) $ (1,124 ) $ (1,882 ) Actuarial Assumptions The weighted average assumptions used in determining the periodic net cost and benefit obligation information related to the SERP are as follows: Years Ended December 31, 2023 2022 Net periodic benefit cost: Discount rate 5.00 % 2.75 % Rate of compensation increase 2.50 % 2.50 % Benefit obligation: Discount rate 4.75 % 5.00 % Rate of compensation increase 2.50 % 2.50 %

Note 16 - Share-based Compensat

Note 16 - Share-based Compensation	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Share-Based Payment Arrangement [Text Block]	16. SHARE-BASED COMPENSATION The Company has an equity compensation program (the "Program") which provides for the granting of "Incentive Stock Options" within the meaning of Section 422 1986, 2020 December 31, 2023 517,000 2020 The Company records compensation expense in its consolidated statements of operations related to employee stock-based options and awards. The aggregate pretax compensation cost recognized for stock-based compensation amounted to approximately $3.5 2023 2022 The Company did not 2023 2022 December 31, 2023 2022 Restricted Stock Awards The Company provides common stock awards to certain officers, directors and key employees. The Company grants these awards, at its discretion, from the shares available under the Program. Unless otherwise provided at the date of grant or unless subsequently accelerated, the shares awarded are typically earned in 25% increments on the second, third, fourth fifth 2023 2022 10,000 shares A summary of the restricted stock activity under the Program for the year ended December 31, 2023 Weighted Average Restricted Stock Weighted Average Remaining Awards Shares Award Price Contractual Term (In Years) Outstanding at January 1, 2023 636,500 $ 26.31 4.4 Granted 10,000 49.19 Vested (119,250 ) 17.96 Forfeited (30,500 ) 21.30 Outstanding at December 31, 2023 496,750 $ 29.09 3.7 As of December 31, 2023 $9.8 mil 4.4 y The Company's policy in 2023

Note 17 - Common Stock

Note 17 - Common Stock	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Equity [Text Block]	17. COMMON STOCK As of December 31, 2023 one 10% no 10% not 1998 90 December 31, 2023 not of Class B common shares or sell or otherwise transfer Class A common shares until its Class A holdings are under 10%. December 31, 2023 , to the Company's knowledge, this shareholder owne f the Company's Class A common stock in the aggregate and had not 10%. ubject shareholder will not Throughout 2023 and 2022 , the Company declared cash dividends on a quarterly basis at a rate of $0.06 per Class A (voting) share of common stock and $0.07 per Class B (non-voting) share of common stock. The Company declared and paid cash dividends totaling $3.5 million in 2023 2022 . There are no not

Note 18 - Leases

Note 18 - Leases	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Lessee, Operating Leases [Text Block]	18. LEASES The Company has operating leases for its facilities used for manufacturing, research and development, sales and administration. There are also operating and finance leases related to manufacturing equipment, office equipment and vehicles. These leases have remaining lease terms ranging from 1 8 not The components of lease expense, which are included in cost of sales, research and development costs, and selling, general and administrative expense, based on the underlying use of the ROU asset, were as follows: Years Ended December 31, 2023 2022 Amortization of ROU assets - finance leases $ 491 $ 448 Interest on lease liabilities - finance leases 121 137 Operating lease cost (cost resulting from lease payments) 8,127 8,426 Short-term lease cost 207 201 Variable lease cost (cost excluded from lease payments) 397 410 Total lease cost $ 9,343 $ 9,622 Supplemental cash flow information related to leases is as follows: Years Ended December 31, 2023 2022 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 8,090 $ 8,970 Operating cash flows from finance leases 121 137 Finance cash flows from finance leases 527 423 Right-of-use assets obtained in exchange for lease obligations: Operating leases 5,999 8,052 Finance leases 199 207 Supplemental balance sheet information related to leases was as follows: 2023 2022 Operating Leases: Operating lease right-of-use assets $ 20,481 $ 21,551 Operating lease liability, current 6,350 5,870 Operating lease liability, long-term 14,212 15,742 Total operating lease liabilities $ 20,562 $ 21,612 Finance Leases: Property, plant and equipment, gross $ 3,484 $ 3,096 Accumulated depreciation (1,613 ) (1,089 ) Property, plant and equipment, net $ 1,871 $ 2,007 Other current liabilities $ 485 $ 446 Other long-term liabilities 1,539 1,608 Total finance lease liabilities $ 2,024 $ 2,054 2023 2022 Weighted-Average Remaining Lease Term: Operating leases (in years) 4.3 5.1 Finance leases (in years) 4.3 4.9 Weighted-Average Discount Rate: Operating leases 6.0 % 6.0 % Finance leases 6.0 % 6.1 % Our discount rate is based on our incremental borrowing rate, as adjusted based on the geographic regions in which our lease assets are located. Maturities of lease liabilities were as follows as of December 31, 2023 Year Ending Operating Finance December 31, Leases Leases 2024 $ 6,658 $ 705 2025 5,954 439 2026 4,381 411 2027 2,342 324 2028 1,240 263 Thereafter 1,976 4 Total undiscounted cash flows 22,551 2,146 Less imputed interest (1,989 ) (234 ) Present value of lease liabilities $ 20,562 $ 1,912

Note 19 - Commitments and Conti

Note 19 - Commitments and Contingencies	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	19. COMMITMENTS AND CONTINGENCIES Other Commitments The Company submits purchase orders for raw materials to various vendors throughout the year for current production requirements, as well as forecasted requirements. Certain of these purchase orders relate to special purpose material and, as such, the Company may $57.7 December 31, 2023 December 31, 2022 $5.8 m December 31, 2023 December 31, 2022 Legal Proceedings The Company is party to a number of legal actions and claims, none On June 23, 2021, Bel Power Solutions, Inc. v. Monolithic Power Systems, Inc. 6:21cv00655, July 27, 2023, In connection with the Company's 2014 2004 2006. September 2012, February 2013, October 2, 2014. October 13, 2014, July 18, 2015 December 5, 2016, January 4, 2017. December 31, 2023 2022. December 31, 2023 2022. In connection with the Company's 2021 1994. 2016 March 2021, may no December 31, 2023. The Company is not

Note 20 - Accumulated Other Com

Note 20 - Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Comprehensive Income (Loss) Note [Text Block]	20. ACCUMULATED OTHER COMPREHENSIVE LOSS The components of accumulated other comprehensive loss as of December 31, 2023 2022 December 31, 2023 2022 Foreign currency translation adjustment, net of taxes of ($ 276 369 $ (16,423 ) $ (23,107 ) Unrealized holding gains on interest rate swap cash flow hedge, net of taxes of $ 0 0 3,960 5,539 Unrealized holding gains on marketable securities, net of taxes of ($ 7 7 19 18 Unfunded SERP liability, net of taxes of $ 718 879 407 1,004 Accumulated other comprehensive loss $ (12,037 ) $ (16,546 ) Changes in accumulated other comprehensive (loss) income by component during the years ended December 31, 2023 2022 Foreign Currency Translation Adjustment Unrealized Gains (Losses) on Interest Rate Swap Cash Flow Hedge Unrealized Holding Gains (Losses) on Marketable Securities Unfunded SERP Liability Total Balance at January 1, 2022 $ (14,911 ) $ (116 ) $ 29 $ (3,865 ) $ (18,863 ) Other comprehensive income (loss) before reclassifications (7,391 ) 5,655 (11 ) 5,119 3,372 Amounts reclassified from accumulated other comprehensive income (loss) (805 ) - - (250 ) (a) (1,055 ) Net current period other comprehensive income (loss) (8,196 ) 5,655 (11 ) 4,869 2,317 Balance at December 31, 2022 (23,107 ) 5,539 18 1,004 (16,546 ) Other comprehensive income (loss) before reclassifications 7,221 (1,579 ) 1 (542 ) 5,101 Amounts reclassified from accumulated other comprehensive income (loss) (537 ) - - (55 ) (a) (592 ) Net current period other comprehensive income (loss) 6,684 (1,579 ) 1 (597 ) 4,509 Balance at December 31, 2023 $ (16,423 ) $ 3,960 $ 19 $ 407 $ (12,037 ) (a) This reclassification relates to the amortization of prior service costs and gains/losses associated with the Company's SERP plan. This expense is reflected in other expense, net on the accompanying consolidated statement of operations.

Note 21 - Subsequent Events

Note 21 - Subsequent Events	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Subsequent Events [Text Block]	21. SUBSEQUENT EVENTS Share Repurchase Program Authorization In February 2024, may 10b 18 1934, not may March 1, 2024 Property Held for Sale In January 2024, December 31, 2023.

Insider Trading Arrangements

Insider Trading Arrangements	12 Months Ended
	Dec. 31, 2023
Insider Trading Arr Line Items
Material Terms of Trading Arrangement [Text Block]	9B. Other Information Other Information – Restructuring The discussion captioned “ Overview – Key Factors Affecting our Business – Restructuring 7, 9B, 10 Rule 10b5 1 10b5 1 During the fiscal quarter ended December 31, 2023, none 16a 1 10b5 1 10b5 1 408
Rule 10b5-1 Arrangement Adopted [Flag]	false
Non-Rule 10b5-1 Arrangement Adopted [Flag]	false
Rule 10b5-1 Arrangement Terminated [Flag]	false
Non-Rule 10b5-1 Arrangement Terminated [Flag]	false

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Principles of Consolidation
Use of Estimates, Policy [Policy Text Block]	Estimates and Uncertainties not not may
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash, Cash Equivalents and Investments original maturity of three $250,000. The Company has held to maturity securities comprised of U.S. Treasury Bills. These investments are classified as held to maturity as the Company has the intent and ability to hold these investments until they mature. The held to maturity securities mature within the next 12 December 31, 2023: Amortized Cost Gross Unrealized Gain Fair Value Held to maturity U.S. Treasury securities $ 37,548 $ 103 $ 37,651 In determining the fair value of the Company's held to maturity U.S. Treasury securities, the Company utilized Level 1 December 31 2023.
Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block]	Allowance for Credit Losses not not not no may no 2023 2022.
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Effects of Foreign Currency not loss of $1.4 million for the year ended December 31, 2023 and a gain of $0.3 million for the year ended December 31, 2022 , which were included in other expense, net on the consolidated statements of operations.
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Concentration of Credit Risk ation of the customer's financial condition, without requiring collateral. Exposure to losses on receivables is principally dependent on each customer's financial condition. We control our exposure to credit risk through credit approvals, credit limits and monitoring procedures and establish allowances for anticipated losses. See Note 14, "Segments, "
Inventory, Policy [Policy Text Block]	Inventories cost or net realizable value.
Revenue from Contract with Customer [Policy Text Block]	Revenue Recognition
Standard Product Warranty, Policy [Policy Text Block]	Product Warranties one three See Note 12, "Accrued Expenses."
Product Returns [Policy Text Block]	Product Returns not not may may may
Goodwill and Intangible Assets, Intangible Assets, Indefinite-Lived, Policy [Policy Text Block]	Goodwill and Identifiable Intangible Assets 1 2 3 Identifiable intangible assets consist primarily of patents, licenses, trademarks, trade names, customer lists and relationships, non-compete agreements and technology-based intangibles and other contractual agreements. We amortize finite-lived identifiable intangible assets over the shorter of their stated or statutory duration or their estimated useful lives, ranging from 1 to 16 years, on a straight-line basis to their estimated residual values and periodically review them for impairment. Total identifiable intangible assets comprise 8.6% a December 31, 2023 2022 We use the acquisition method of accounting for those business combinations in which we acquire 100% not fourth
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Impairment and Disposal of Long-Lived Assets December 31, 2023, no December 31, 2023. For indefinite-lived intangible assets, such as goodwill, trademarks and trade names, each year and whenever impairment indicators are present, we determine the fair value of the asset and record an impairment loss for the excess of book value over the fair value, if any. In addition, in all cases of an impairment review we re-evaluate whether continuing to characterize the asset as indefinite-lived is appropriate. See Note 5, "Goodwill and Other Intangible Assets," for additional details.
Depreciation, Depletion, and Amortization [Policy Text Block]	Depreciation fro m 1 to 33 years for buildings and leasehold improvements, and from 3 to 14 years for m achinery and equipment.
Derivatives, Policy [Policy Text Block]	Derivative Financial Instruments not The Company records all derivatives as assets or liabilities on our consolidated balance sheets at their fair values. Gains and losses from the changes in values of these derivatives are accounted for based on the use of the derivative and whether it qualifies for hedge accounting. The Company's interest rate swaps and foreign currency forward contracts related to the Chinese renminbi (both further described in Note 13, "Derivative Instruments and Hedging Activities" ) have been designated as cash flow hedges and as such, gains/losses are recorded in accumulated other comprehensive income until such time the hedged item affects earnings. The counterparties to our derivative financial instruments consist of several major international financial institutions. We regularly monitor the financial strength of these institutions. While the counterparties to these contracts expose us to the potential risk of credit-related losses in the event of a counterparty’s non-performance, the risk would be limited to the unrealized gains on such affected contracts.
Income Tax, Policy [Policy Text Block]	Income Taxes - We account for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the consolidated financial statements. Under this method, deferred tax assets and liabilities are determined based on the differences between the financial statement and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date. See Note 10, “Income Taxes”. not not not may may not
Earnings Per Share, Policy [Policy Text Block]	Earnings per Share two two two There were no potential common shares outstanding during the years ended December 31, 2023 2022 which would have had a dilutive effect on earnings per share. The earnings and weighted average shares outstanding used in the computation of basic and diluted earnings per share are as follows: Years Ended December 31, 2023 2022 Numerator: Net earnings $ 73,831 $ 52,689 Less dividends declared: Class A 512 514 Class B 2,997 2,922 Undistributed earnings $ 70,322 $ 49,253 Undistributed earnings allocation: Class A undistributed earnings $ 11,318 $ 8,084 Class B undistributed earnings 59,004 41,169 Total undistributed earnings $ 70,322 $ 49,253 Net earnings allocation: Class A net earnings $ 11,830 $ 8,598 Class B net earnings 62,001 44,091 Net earnings $ 73,831 $ 52,689 Denominator: Weighted average shares outstanding: Class A 2,142 2,143 Class B 10,634 10,394 Net earnings per share: Class A $ 5.52 $ 4.01 Class B $ 5.83 $ 4.24
Research and Development Expense, Policy [Policy Text Block]	Research and Development ("R&D") December 31, 2023 2022 $22.5 million
Fair Value of Financial Instruments, Policy [Policy Text Block]	Fair Value Measurements three Level 1 Level 2 Level 3 no For financial instruments such as cash and cash equivalents, accounts receivable, accounts payable and accrued expenses, the carrying amount approximates fair value because of the short maturities of such instruments. See Note 6, "Fair Value Measurements,"
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Issued Accounting Standards Recently Adopted Accounting Standards In March 2020, 2020 04, Reference Rate Reform (Topic 848 2020 04 January 2021, 2021 01, 848 December 31, 2022. December 2022, 2022 06, Reference Rate Reform (Topic 848 848 December 31, 2024. January 2023, January 31, 2023. 2020 04 first 2023 not In June 2016, 2016 13, Financial Instruments Credit Losses (Topic 326 , January 1, 2023, 2016 13. not Accounting Standards Issued But Not In November 2023, 2023 07, Segment Reporting (Topic 280 not December 15, 2023, December 15, 2024, no In December 2023, 2023 09, Income Taxes (Topic 740 2023 09 5% December 15, 2024, may December 31, 2025 may no

Note 1 - Description of Busin_2

Note 1 - Description of Business and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Debt Securities, Held-to-Maturity [Table Text Block]	Amortized Cost Gross Unrealized Gain Fair Value Held to maturity U.S. Treasury securities $ 37,548 $ 103 $ 37,651
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Years Ended December 31, 2023 2022 Numerator: Net earnings $ 73,831 $ 52,689 Less dividends declared: Class A 512 514 Class B 2,997 2,922 Undistributed earnings $ 70,322 $ 49,253 Undistributed earnings allocation: Class A undistributed earnings $ 11,318 $ 8,084 Class B undistributed earnings 59,004 41,169 Total undistributed earnings $ 70,322 $ 49,253 Net earnings allocation: Class A net earnings $ 11,830 $ 8,598 Class B net earnings 62,001 44,091 Net earnings $ 73,831 $ 52,689 Denominator: Weighted average shares outstanding: Class A 2,142 2,143 Class B 10,634 10,394 Net earnings per share: Class A $ 5.52 $ 4.01 Class B $ 5.83 $ 4.24

Note 3 - Divestiture of Subsi_2

Note 3 - Divestiture of Subsidiary (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Disposal Groups, Including Discontinued Operations [Table Text Block]	Total Cash and cash equivalents $ 2,072 Accounts receivable 1,030 Inventories 1,310 Property, plant and equipment 326 Other assets 48 Accounts payable (441 ) Accrued expenses (126 ) Income taxes payable (100 ) Other current liabilities (13 ) Other long-term liabilities (23 ) Total net assets transferred 4,083 Consideration received 5,063 Gain on sale recognized $ 980

Note 4 - Revenue (Tables)

Note 4 - Revenue (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Disaggregation of Revenue [Table Text Block]	Year Ended December 31, 2023 Power Solutions Connectivity Magnetic and Protection Solutions Solutions Consolidated By Geographic Region: North America $ 233,016 $ 172,518 $ 42,259 $ 447,793 Europe 57,567 32,689 8,263 98,519 Asia 23,522 5,365 64,614 93,501 $ 314,105 $ 210,572 $ 115,136 $ 639,813 By Sales Channel: Direct to customer $ 221,828 $ 130,893 $ 86,608 $ 439,329 Through distribution 92,277 79,679 28,528 200,484 $ 314,105 $ 210,572 $ 115,136 $ 639,813 Year Ended December 31, 2022 Power Solutions Connectivity Magnetic and Protection Solutions Solutions Consolidated By Geographic Region: North America $ 217,381 $ 141,585 $ 50,234 $ 409,200 Europe 42,121 35,596 10,903 88,620 Asia 28,864 9,904 117,645 156,413 $ 288,366 $ 187,085 $ 178,782 $ 654,233 By Sales Channel: Direct to customer $ 186,439 $ 112,128 $ 135,247 $ 433,814 Through distribution 101,927 74,957 43,535 220,419 $ 288,366 $ 187,085 $ 178,782 $ 654,233
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]	December 31, December 31, 2023 2022 Contract assets - current (unbilled receivables) $ 12,793 $ 18,244 Contract liabilities - current (deferred revenue) $ 3,046 $ 8,847 Year Ended December 31, 2023 Balance, January 1 $ 8,847 New advance payments received 4,121 Recognized as revenue during period (9,930 ) Currency translation 8 Balance, December 31 $ 3,046

Note 5 - Goodwill and Other I_2

Note 5 - Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Goodwill [Table Text Block]	Total Power Solutions & Protection Connectivity Solutions Magnetic Solutions Balance at January 1, 2023: Goodwill, gross $ 25,099 $ 18,152 $ 6,947 $ - Goodwill, net $ 25,099 $ 18,152 $ 6,947 $ - Foreign currency translation 1,543 471 1,072 - Balance at December 31, 2023: Goodwill, gross $ 26,642 $ 18,623 $ 8,019 $ - Goodwill, net $ 26,642 $ 18,623 $ 8,019 $ -
Schedule of Excess of Estimated Fair Values Over Carrying Value, Including Goodwill [Table Text Block]	Reporting Unit % by Which Estimated Fair Value Exceeds Carrying Value Power Europe 89.1% Connectivity Europe 79.9% EOS 71.2% CUI 169.4%
Schedule of Finite Lived and Indefinite Lived Intangible Assets [Table Text Block]	December 31, 2023 December 31, 2022 Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Amount Amortization Amount Amount Amortization Amount Patents, licenses and technology $ 19,176 $ 11,386 $ 7,790 $ 38,607 $ 30,156 $ 8,451 Customer relationships 56,711 32,099 24,612 56,917 28,096 28,821 Non-compete agreements - - - 2,662 2,662 - Trademarks (indefinite-lived) 17,148 159 16,989 16,999 160 16,839 $ 93,035 $ 43,644 $ 49,391 $ 115,185 $ 61,074 $ 54,111
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	December 31, Amortization Expense 2024 $ 4,563 2025 4,551 2026 4,551 2027 4,551 2028 4,551

Note 6 - Fair Value Measureme_2

Note 6 - Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]	December 31, 2023 Carrying value Fair value Cash and cash equivalents Other Current Assets Cash $ 57,544 $ 57,544 $ 57,544 $ - Level 1: Money market funds 31,188 31,188 31,188 - Money market funds (Rabbi Trust) 303 303 - 303 Subtotal 31,491 31,491 31,188 303 Level 2: Certificates of deposit and time deposits 3,629 3,926 639 2,990 Subtotal 3,629 3,926 639 2,990 Total $ 92,664 $ 92,961 $ 89,371 $ 3,293 December 31, 2022 Carrying value Fair value Cash and cash equivalents Other Current Assets Cash $ 70,266 $ 70,266 $ 70,266 $ - Level 1: Money market funds (Rabbi Trust) 101 101 - 101 Subtotal 101 101 - 101 Total $ 70,367 $ 70,367 $ 70,266 $ 101
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	Balance Sheet Classification December 31, 2023 December 31, 2022 Derivative assets: Foreign currency forward contracts: Designated as cash flow hedges Other current assets $ - $ 359 Not designated as hedging instruments Other current assets 486 - Interest rate swap agreements: Designated as a cash flow hedge Other assets 3,960 5,539 Total derivative assets $ 4,446 $ 5,898 Derivative liabilities: Foreign currency forward contracts: Designated as cash flow hedges Other current liabilities $ 5 $ - Total derivative liabilities $ 5 $ -

Note 8 - Inventories (Tables)

Note 8 - Inventories (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Inventory, Current [Table Text Block]	December 31, 2023 2022 Raw materials $ 63,647 $ 74,572 Work in progress 42,038 44,397 Finished goods 30,855 53,496 Inventories $ 136,540 $ 172,465

Note 9 - Property, Plant and _2

Note 9 - Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Property, Plant and Equipment [Table Text Block]	December 31, 2023 2022 Land $ 348 $ 1,098 Buildings and improvements 15,286 21,529 Machinery and equipment 98,527 118,358 Construction in progress 1,567 4,239 115,728 145,224 Accumulated depreciation (79,195 ) (108,391 ) Property, plant and equipment, net $ 36,533 $ 36,833

Note 10 - Income Taxes (Tables)

Note 10 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	Years Ended December 31, 2023 2022 Liability for uncertain tax positions - January 1 $ 24,798 $ 28,434 Additions based on tax positions related to the current year 973 1,284 Translation adjustment (249 ) (1,121 ) Settlement/expiration of statutes of limitations (5,699 ) (3,799 ) Liability for uncertain tax positions - December 31 $ 19,823 $ 24,798
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Years Ended December 31, 2023 2022 Current: Federal $ 11,403 $ 9,175 State 975 787 Foreign 963 1,002 13,341 10,964 Deferred: Federal (3,128 ) (4,064 ) State (139 ) (255 ) Foreign (605 ) (275 ) (3,872 ) (4,594 ) $ 9,469 $ 6,370
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Years Ended December 31, 2023 2022 $ % $ % Tax provision computed at the federal statutory rate $ 17,493 21 % $ 12,402 21 % (Decrease) increase in taxes resulting from: Different tax rates applicable to foreign operations (1,697 ) (2 %) (1,677 ) (3 %) Reversal of liability for uncertain tax positions - net (4,726 ) (6 %) (2,515 ) (4 %) Research and experimentation and foreign tax credits (75 ) (0 %) (139 ) (0 %) State taxes, net of federal benefit (433 ) (1 %) 292 0 % SERP/COLI and restricted stock income (756 ) (1 %) 733 1 % Other, net (337 ) (0 %) (2,726 ) (5 %) Tax provision computed at the Company's effective tax rate $ 9,469 11 % $ 6,370 11 %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	December 31, 2023 2022 Tax Effect Tax Effect Deferred tax assets: State tax credits $ 424 $ 571 Unfunded pension liability (255 ) (416 ) Reserves and accruals 4,504 4,947 Federal, state and foreign net operating loss and credit carryforwards 4,303 4,316 Depreciation 435 437 Amortization 6,004 2,968 Lease accounting 4,605 4,816 Other accruals 5,997 6,486 Total deferred tax assets 26,017 24,125 Deferred tax liabilities: Depreciation 2,331 2,227 Amortization 6,359 6,178 Lease accounting 4,659 4,889 Other accruals 562 780 Total deferred tax liabilities 13,911 14,074 Valuation allowance 2,009 4,027 Net deferred tax assets $ 10,097 $ 6,024

Note 11 - Debt (Tables)

Note 11 - Debt (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Maturities of Long-Term Debt [Table Text Block]	2024 $ - 2025 - 2026 60,000 2027 - 2028 - Total long-term debt 60,000 Less: Current maturities of long-term debt - Noncurrent portion of long-term debt $ 60,000

Note 12 - Accrued Expenses (Tab

Note 12 - Accrued Expenses (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Accrued Liabilities [Table Text Block]	December 31, 2023 2022 Salaries, bonuses and related benefits $ 33,566 $ 27,422 Deferred revenue 3,046 8,847 Accrued restructuring costs 5,498 6,796 Sales commissions 2,347 2,521 Subcontracting labor 1,622 1,875 Warranty accrual 1,542 1,287 Other 7,036 2,125 $ 54,657 $ 50,873
Restructuring and Related Costs [Table Text Block]	Year Ended December 31, 2023 Liability at Cash Payments Liability at December 31, New and Other December 31, 2022 Charges Settlements 2023 Severance costs $ 3,390 $ 7,590 $ (9,429 ) $ 1,551 Disposal of equipment in connection with restructuring - 1,320 (1,320 ) - Other restructuring costs 3,406 1,204 (663 ) 3,947 Total $ 6,796 $ 10,114 $ (11,412 ) $ 5,498

Note 13 - Derivative Instrume_2

Note 13 - Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Derivative Instruments, Gain (Loss) [Table Text Block]	Years Ended December 31, 2023 2022 Net (losses) gains recognized in AOCL: Foreign currency forward contracts $ (1,470 ) $ (119 ) Interest rate swap agreements 689 5,886 $ (781 ) $ 5,767 Net (losses) gains reclassified from AOCL to the consolidated statement of operations: Foreign currency forward contracts $ (537 ) $ (805 ) Interest rate swap agreements 2,268 230 $ 1,731 $ (575 )
Derivatives Not Designated as Hedging Instruments [Table Text Block]	Years Ended December 31, Classification in Consolidated Statements of Operations 2023 2022 Foreign currency forward contracts Other expense, net 150 58 $ 150 $ 58

Note 14 - Segments (Tables)

Note 14 - Segments (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Year Ended December 31, 2023 Power Solutions and Protection Connectivity Solutions Magnetic Solutions Corporate/ Other Total Net sales $ 314,105 $ 210,572 $ 115,136 $ - $ 639,813 Gross Profit 119,741 72,031 25,314 (1,237 ) 215,849 Gross Profit % 38.1 % 34.2 % 22.0 % nm 33.7 % Total Assets 222,068 197,045 47,900 104,618 571,631 Capital Expenditures 4,563 7,384 160 19 12,126 Depreciation and Amortization Expense 5,280 6,152 1,094 786 13,312 Year Ended December 31, 2022 Power Solutions and Protection Connectivity Solutions Magnetic Solutions Corporate/ Other Total Net sales $ 288,366 $ 187,085 $ 178,782 $ - $ 654,233 Gross Profit 87,840 48,488 49,290 (2,165 ) 183,453 Gross Profit % 30.5 % 25.9 % 27.6 % nm 28.0 % Total Assets 234,095 170,895 107,891 47,585 560,466 Capital Expenditures 3,916 4,566 350 - 8,832 Depreciation and Amortization Expense 6,470 6,145 2,133 115 14,863
Revenue from External Customers by Geographic Areas [Table Text Block]	Years Ended December 31, 2023 2022 Net Sales by Geographic Location: United States $ 447,793 $ 409,199 People's Republic of China 43,109 77,061 Macao 35,026 61,744 United Kingdom 25,648 21,903 Slovakia 35,555 22,120 Germany 17,327 24,112 India 15,365 17,608 Switzerland 11,237 9,893 All other foreign countries 8,753 10,593 Consolidated net sales $ 639,813 $ 654,233 Net Sales by Major Product Line: Power solutions and protection $ 314,105 $ 288,366 Connectivity solutions 210,572 187,085 Magnetic solutions 115,136 178,782 Consolidated net sales $ 639,813 $ 654,233
Long-Lived Assets by Geographic Areas [Table Text Block]	December 31, 2023 2022 Long-lived Assets by Geographic Location: United States $ 34,990 $ 33,875 People's Republic of China (PRC) 23,621 28,222 Slovakia 7,468 6,738 United Kingdom 3,024 1,109 All other foreign countries 549 1,072 Consolidated long-lived assets $ 69,652 $ 71,016

Note 15 - Retirement Fund and_2

Note 15 - Retirement Fund and Profit Sharing Plan (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Net Benefit Costs [Table Text Block]	Years Ended December 31, 2023 2022 Service Cost $ 369 $ 503 Interest Cost 886 636 Net amortization 71 312 Net periodic benefit cost $ 1,326 $ 1,451
Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets [Table Text Block]	Years Ended December 31, 2023 2022 Fair value of plan assets, January 1 $ - $ - Company contributions 775 606 Benefits paid (775 ) (606 ) Fair value of plan assets, December 31 $ - $ - Benefit obligation, January 1 $ 18,175 $ 23,580 Service cost 370 503 Interest cost 886 636 Benefits paid (775 ) (606 ) Actuarial loss (gain) 828 (5,938 ) Benefit obligation, December 31 $ 19,484 $ 18,175 Underfunded status, December 31 $ (19,484 ) $ (18,175 )
Schedule of Expected Benefit Payments [Table Text Block]	Years Ending December 31, 2024 $ 972 2025 1,015 2026 1,033 2027 1,150 2028 1,321 2029 - 2033 7,218
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]	December 31, 2023 2022 Prior service cost $ 212 $ 334 Net loss (1,336 ) (2,216 ) $ (1,124 ) $ (1,882 )
Defined Benefit Plan, Assumptions [Table Text Block]	Years Ended December 31, 2023 2022 Net periodic benefit cost: Discount rate 5.00 % 2.75 % Rate of compensation increase 2.50 % 2.50 % Benefit obligation: Discount rate 4.75 % 5.00 % Rate of compensation increase 2.50 % 2.50 %

Note 16 - Share-based Compens_2

Note 16 - Share-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]	Weighted Average Restricted Stock Weighted Average Remaining Awards Shares Award Price Contractual Term (In Years) Outstanding at January 1, 2023 636,500 $ 26.31 4.4 Granted 10,000 49.19 Vested (119,250 ) 17.96 Forfeited (30,500 ) 21.30 Outstanding at December 31, 2023 496,750 $ 29.09 3.7

Note 18 - Leases (Tables)

Note 18 - Leases (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Lease, Cost [Table Text Block]	Years Ended December 31, 2023 2022 Amortization of ROU assets - finance leases $ 491 $ 448 Interest on lease liabilities - finance leases 121 137 Operating lease cost (cost resulting from lease payments) 8,127 8,426 Short-term lease cost 207 201 Variable lease cost (cost excluded from lease payments) 397 410 Total lease cost $ 9,343 $ 9,622 2023 2022 Weighted-Average Remaining Lease Term: Operating leases (in years) 4.3 5.1 Finance leases (in years) 4.3 4.9 Weighted-Average Discount Rate: Operating leases 6.0 % 6.0 % Finance leases 6.0 % 6.1 %
Leases, Supplemental Cash Flow Information [Table Text Block]	Years Ended December 31, 2023 2022 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 8,090 $ 8,970 Operating cash flows from finance leases 121 137 Finance cash flows from finance leases 527 423 Right-of-use assets obtained in exchange for lease obligations: Operating leases 5,999 8,052 Finance leases 199 207
Lease, Supplemental Balance Sheet Information [Table Text Block]	2023 2022 Operating Leases: Operating lease right-of-use assets $ 20,481 $ 21,551 Operating lease liability, current 6,350 5,870 Operating lease liability, long-term 14,212 15,742 Total operating lease liabilities $ 20,562 $ 21,612 Finance Leases: Property, plant and equipment, gross $ 3,484 $ 3,096 Accumulated depreciation (1,613 ) (1,089 ) Property, plant and equipment, net $ 1,871 $ 2,007 Other current liabilities $ 485 $ 446 Other long-term liabilities 1,539 1,608 Total finance lease liabilities $ 2,024 $ 2,054
Lessee, Operating and Financing Lease Liability Maturity [Table Text Block]	Year Ending Operating Finance December 31, Leases Leases 2024 $ 6,658 $ 705 2025 5,954 439 2026 4,381 411 2027 2,342 324 2028 1,240 263 Thereafter 1,976 4 Total undiscounted cash flows 22,551 2,146 Less imputed interest (1,989 ) (234 ) Present value of lease liabilities $ 20,562 $ 1,912

Note 20 - Accumulated Other C_2

Note 20 - Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	December 31, 2023 2022 Foreign currency translation adjustment, net of taxes of ($ 276 369 $ (16,423 ) $ (23,107 ) Unrealized holding gains on interest rate swap cash flow hedge, net of taxes of $ 0 0 3,960 5,539 Unrealized holding gains on marketable securities, net of taxes of ($ 7 7 19 18 Unfunded SERP liability, net of taxes of $ 718 879 407 1,004 Accumulated other comprehensive loss $ (12,037 ) $ (16,546 )
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component [Table Text Block]	Foreign Currency Translation Adjustment Unrealized Gains (Losses) on Interest Rate Swap Cash Flow Hedge Unrealized Holding Gains (Losses) on Marketable Securities Unfunded SERP Liability Total Balance at January 1, 2022 $ (14,911 ) $ (116 ) $ 29 $ (3,865 ) $ (18,863 ) Other comprehensive income (loss) before reclassifications (7,391 ) 5,655 (11 ) 5,119 3,372 Amounts reclassified from accumulated other comprehensive income (loss) (805 ) - - (250 ) (a) (1,055 ) Net current period other comprehensive income (loss) (8,196 ) 5,655 (11 ) 4,869 2,317 Balance at December 31, 2022 (23,107 ) 5,539 18 1,004 (16,546 ) Other comprehensive income (loss) before reclassifications 7,221 (1,579 ) 1 (542 ) 5,101 Amounts reclassified from accumulated other comprehensive income (loss) (537 ) - - (55 ) (a) (592 ) Net current period other comprehensive income (loss) 6,684 (1,579 ) 1 (597 ) 4,509 Balance at December 31, 2023 $ (16,423 ) $ 3,960 $ 19 $ 407 $ (12,037 )

Note 1 - Description of Busin_3

Note 1 - Description of Business and Summary of Significant Accounting Policies (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Gain (Loss), Foreign Currency Transaction, before Tax	$ (1,356)	$ 278
Intangible Assets, Percent of Total Assets	8.60%	9.70%
Excessive Dividend Rate of Class B Over Class A	5%
Excessive Undistributed Earnings Allocation Rate of Class B Over Class A	5%
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	0	0
Research and Development Expense	$ 22,487	$ 20,238
Common Class B [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.1	$ 0.1
Common Class A [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.1	$ 0.1
Other Current Assets [Member]
Asset, Held-for-Sale, Not Part of Disposal Group, Current	$ 1,300
Minimum [Member]
Standard Product Warranty, Period (Year)	1 year
Finite-Lived Intangible Asset, Useful Life (Year)	1 year
Minimum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment, Useful Life (Year)	1 year
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Maximum [Member]
Standard Product Warranty, Period (Year)	3 years
Finite-Lived Intangible Asset, Useful Life (Year)	16 years
Maximum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment, Useful Life (Year)	33 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)	14 years

Note 1 - Description of Busin_4

Note 1 - Description of Business and Summary of Significant Accounting Policies - Held to Maturity Securities (Details) - US Treasury Securities [Member] $ in Thousands	Dec. 31, 2023 USD ($)
Held to maturity U.S. Treasury securities, amortized cost	$ 37,548
Held to maturity U.S. Treasury securities, gross unrealized gains	103
Held to maturity U.S. Treasury securities, fair value	$ 37,651

Note 1 - Description of Busin_5

Note 1 - Description of Business and Summary of Significant Accounting Policies - Basic and Diluted Net Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Net earnings	$ 73,831	$ 52,689
Undistributed earnings	70,322	49,253
Common Class A [Member]
Net earnings	11,830	8,598
Less dividends declared	512	514
Undistributed earnings	$ 11,318	$ 8,084
Weighted-average shares outstanding, basic and diluted (in shares)	2,142	2,143
Net earnings per share, basic and diluted (in dollars per share)	$ 5.52	$ 4.01
Common Class B [Member]
Net earnings	$ 62,001	$ 44,091
Less dividends declared	2,997	2,922
Undistributed earnings	$ 59,004	$ 41,169
Weighted-average shares outstanding, basic and diluted (in shares)	10,634	10,394
Net earnings per share, basic and diluted (in dollars per share)	$ 5.83	$ 4.24

Note 2 - Investment in Innole_2

Note 2 - Investment in Innolectric (Details Textual) $ in Thousands, € in Millions			12 Months Ended
	Feb. 01, 2023 USD ($)	Feb. 01, 2023 EUR (€)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 EUR (€)	Dec. 31, 2022 USD ($)
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures			$ 10,282		$ 0
Innolectric AG [Member]
Loans and Leases Receivable, Related Parties			$ 2,100	€ 2
Loans and Leases Receivable, Interest Rate			5%	5%
Innolectric AG [Member] | Power Solutions and Protection Segment [Member]
Net Income (Loss) Attributable to Noncontrolling Interest			$ 800
Innolectric AG [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner	33.33%
Payments to Acquire Interest in Subsidiaries and Affiliates	$ 8,800	€ 8
Business Acquisition, Transaction Costs	1,300
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	11,000
Business Combination, Consideration Transferred, Liabilities Incurred	$ 1,000

Note 3 - Divestiture of Subsi_3

Note 3 - Divestiture of Subsidiary (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2023	Jun. 01, 2023
Bel Stewart s.r.o. [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Disposal Group, Including Discontinued Operation, Consideration	$ 5,063	$ 5,100

Note 3 - Divestiture of Subsi_4

Note 3 - Divestiture of Subsidiary - Assets and Liabilities Included in Sale (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Jun. 01, 2023
Gain on sale recognized	$ 980	$ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Bel Stewart s.r.o. [Member]
Cash and cash equivalents	2,072
Accounts receivable	1,030
Inventories	1,310
Property, plant and equipment	326
Other assets	48
Accounts payable	441
Accrued expenses	126
Income taxes payable	100
Other current liabilities	13
Other long-term liabilities	23
Total net assets transferred	4,083
Consideration received	5,063		$ 5,100
Gain on sale recognized	$ 980

Note 4 - Revenue (Details Textu

Note 4 - Revenue (Details Textual) $ in Millions	Dec. 31, 2023 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Amount	$ 2.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Amount	$ 4.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Amount	$ 1.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	1 year

Note 4 - Revenue - Disaggregati

Note 4 - Revenue - Disaggregation of Revenue by Product Group and Sales Channel (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Net sales	$ 639,813	$ 654,233
Sales Channel, Directly to Consumer [Member]
Net sales	439,329	433,814
Sales Channel, Through Intermediary [Member]
Net sales	200,484	220,419
Power Solutions and Protection [Member]
Net sales	314,105	288,366
Power Solutions and Protection [Member] | Sales Channel, Directly to Consumer [Member]
Net sales	221,828	186,439
Power Solutions and Protection [Member] | Sales Channel, Through Intermediary [Member]
Net sales	92,277	101,927
Connectivity Solutions [Member]
Net sales	210,572	187,085
Connectivity Solutions [Member] | Sales Channel, Directly to Consumer [Member]
Net sales	130,893	112,128
Connectivity Solutions [Member] | Sales Channel, Through Intermediary [Member]
Net sales	79,679	74,957
Magnetic Solutions [Member]
Net sales	115,136	178,782
Magnetic Solutions [Member] | Sales Channel, Directly to Consumer [Member]
Net sales	86,608	135,247
Magnetic Solutions [Member] | Sales Channel, Through Intermediary [Member]
Net sales	28,528	43,535
North America [Member]
Net sales	447,793	409,200
North America [Member] | Power Solutions and Protection [Member]
Net sales	233,016	217,381
North America [Member] | Connectivity Solutions [Member]
Net sales	172,518	141,585
North America [Member] | Magnetic Solutions [Member]
Net sales	42,259	50,234
Europe [Member]
Net sales	98,519	88,620
Europe [Member] | Power Solutions and Protection [Member]
Net sales	57,567	42,121
Europe [Member] | Connectivity Solutions [Member]
Net sales	32,689	35,596
Europe [Member] | Magnetic Solutions [Member]
Net sales	8,263	10,903
Asia [Member]
Net sales	93,501	156,413
Asia [Member] | Power Solutions and Protection [Member]
Net sales	23,522	28,864
Asia [Member] | Connectivity Solutions [Member]
Net sales	5,365	9,904
Asia [Member] | Magnetic Solutions [Member]
Net sales	$ 64,614	$ 117,645

Note 4 - Revenue - Contract Ass

Note 4 - Revenue - Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Contract assets - current (unbilled receivables)	$ 12,793	$ 18,244
Contract liabilities - current (deferred revenue)	3,046	$ 8,847
Balance, January 1	8,847
New advance payments received	4,121
Recognized as revenue during period	(9,930)
Currency translation	8
Balance, December 31	$ 3,046

Note 5 - Goodwill and Other I_3

Note 5 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Oct. 01, 2019
Goodwill, Impaired, Accumulated Impairment Loss				$ 137,500
Goodwill, Impairment Loss	$ 0
Amortization of Intangible Assets		$ 4,700	$ 6,000
Trademarks [Member]
Impairment of Intangible Assets, Finite-Lived		$ 0	$ 0
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	1 year	1 year
Minimum [Member] | Intangible Assets Excluding Trademarks [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	1 year	1 year
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	16 years	16 years
Maximum [Member] | Intangible Assets Excluding Trademarks [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	12 years	12 years

Note 5 - Goodwill and Other I_4

Note 5 - Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
Goodwill, gross	$ 26,642	$ 25,099
Goodwill, net	26,642	25,099	$ 25,099
Foreign currency translation	1,543
Power Solutions and Protection Segment [Member]
Goodwill, gross	18,623	18,152
Goodwill, net	18,623	18,152
Foreign currency translation	471
Connectivity Solutions [Member]
Goodwill, gross	8,019	6,947
Goodwill, net	8,019	6,947
Foreign currency translation	1,072
Magnetic Solutions Segment [Member]
Goodwill, gross	0	0
Goodwill, net	0	$ 0
Foreign currency translation	$ 0

Note 5 - Goodwill and Other I_5

Note 5 - Goodwill and Other Intangible Assets - Estimated Fair Values Over Carrying Value, Including Goodwill (Details) - Europe [Member]	Dec. 31, 2023
Power Solutions and Protection Segment [Member]
% by Which Estimated Fair Value Exceeds Carrying Value	89.10%
Cinch Connectivity Solutions Segment [Member]
% by Which Estimated Fair Value Exceeds Carrying Value	79.90%
EOS Power Panama Inc. [Member]
% by Which Estimated Fair Value Exceeds Carrying Value	71.20%
CUI Power [Member]
% by Which Estimated Fair Value Exceeds Carrying Value	169.40%

Note 5 - Goodwill and Other I_6

Note 5 - Goodwill and Other Intangible Assets - Components of Definite and Indefinite-lived Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Gross carrying amount	$ 93,035	$ 115,185
Accumulated amortization	43,644	61,074
Net carrying amount	49,391	54,111
Trademarks [Member]
Trademarks (indefinite-lived)	17,148	16,999
Trademarks (indefinite-lived)	159	160
Trademarks (indefinite-lived)	16,989	16,839
Patents, Licenses and Technology [Member]
Gross carrying amount	19,176	38,607
Accumulated amortization	11,386	30,156
Net carrying amount	7,790	8,451
Customer Relationships [Member]
Gross carrying amount	56,711	56,917
Accumulated amortization	32,099	28,096
Net carrying amount	24,612	28,821
Noncompete Agreements [Member]
Gross carrying amount	0	2,662
Accumulated amortization	0	2,662
Net carrying amount	$ 0	$ 0

Note 5 - Goodwill and Other I_7

Note 5 - Goodwill and Other Intangible Assets - Estimated Amortization Expense (Details) $ in Thousands	Dec. 31, 2023 USD ($)
2024	$ 4,563
2025	4,551
2026	4,551
2027	4,551
2028	$ 4,551

Note 6 - Fair Value Measureme_3

Note 6 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Derivative Asset	$ 4,446	$ 5,898
Long-Term Debt, Fair Value	60,000	95,000
Long-Term Debt, Gross	60,000	95,000
Fair Value, Nonrecurring [Member]
Assets, Fair Value Disclosure, Total	0	0
Foreign Exchange Forward [Member]
Derivative Assets (Liabilities), at Fair Value, Net	500	400
Interest Rate Swap [Member]
Derivative Asset	4,000	5,500
Investments Held in Rabbi Trust [Member]
Debt Securities, Available-for-Sale	$ 300	$ 100

Note 6 - Fair Value Measureme_4

Note 6 - Fair Value Measurements - Fair Value Assets by Investment Category (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Cash and Cash Equivalents [Member]
Assets, fair value	$ 89,371	$ 70,266
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, fair value	31,188	0
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, fair value	639
Other Current Assets [Member]
Assets, fair value	3,293	101
Other Current Assets [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, fair value	303	101
Other Current Assets [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, fair value	2,990
Cash [Member] | Cash and Cash Equivalents [Member]
Assets, fair value	57,544	70,266
Cash [Member] | Other Current Assets [Member]
Assets, fair value	0	0
Money Market Funds [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, fair value	31,188	0
Money Market Funds [Member] | Other Current Assets [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, fair value	0	101
Money Market Funds, Rabbi Trust [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, fair value	0
Money Market Funds, Rabbi Trust [Member] | Other Current Assets [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, fair value	303
Certificates of Deposit [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, fair value	639
Certificates of Deposit [Member] | Other Current Assets [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, fair value	2,990
Reported Value Measurement [Member]
Assets, fair value	92,664	70,367
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, fair value	31,491	101
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, fair value	3,629
Reported Value Measurement [Member] | Cash [Member]
Assets, fair value	57,544	70,266
Reported Value Measurement [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, fair value	31,188	101
Reported Value Measurement [Member] | Money Market Funds, Rabbi Trust [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, fair value	303
Reported Value Measurement [Member] | Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, fair value	3,629
Estimate of Fair Value Measurement [Member]
Assets, fair value	92,961	70,367
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, fair value	31,491	101
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, fair value	3,926
Estimate of Fair Value Measurement [Member] | Cash [Member]
Assets, fair value	57,544	70,266
Estimate of Fair Value Measurement [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, fair value	31,188	$ 101
Estimate of Fair Value Measurement [Member] | Money Market Funds, Rabbi Trust [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, fair value	303
Estimate of Fair Value Measurement [Member] | Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, fair value	$ 3,926

Note 6 - Fair Value Measureme_5

Note 6 - Fair Value Measurements - Fair Value of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Total derivative assets	$ 4,446	$ 5,898
Total derivative liabilities	5	0
Interest Rate Swap [Member]
Total derivative assets	4,000	5,500
Other Current Assets [Member] | Foreign Exchange Forward [Member]
Designated as cash flow hedges	0	359
Not designated as hedging instruments	486	0
Other Noncurrent Assets [Member] | Interest Rate Swap [Member]
Designated as a cash flow hedge	3,960	5,539
Other Current Liabilities [Member] | Foreign Exchange Forward [Member]
Designated as a cash flow hedge	$ 5	$ 0

Note 7 - Other Assets (Details

Note 7 - Other Assets (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Liability, Defined Benefit Plan, Noncurrent	$ 19,876	$ 18,522
Cash Surrender Value, Fair Value Disclosure	15,100	13,900
Increase (Decrease) in Cash Surrender Value	1,300	(2,200)
Investments Held in Rabbi Trust [Member]
Debt Securities, Available-for-Sale, Amortized Cost	300	100
Debt Securities, Available-for-Sale	300	100
Supplemental Employee Retirement Plan [Member]
Liability, Defined Benefit Plan, Noncurrent	19,500	18,200
Investments, Fair Value Disclosure	$ 15,400	$ 14,000

Note 8 - Inventories - Componen

Note 8 - Inventories - Components of Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Raw materials	$ 63,647	$ 74,572
Work in progress	42,038	44,397
Finished goods	30,855	53,496
Inventories	$ 136,540	$ 172,465

Note 9 - Property, Plant and _3

Note 9 - Property, Plant and Equipment (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Depreciation	$ 8.6	$ 8.9
Jersey City [Member]
Asset, Held-for-Sale, Not Part of Disposal Group	$ 1.3	$ 1.5

Note 8 - Property, Plant and Eq

Note 8 - Property, Plant and Equipment, Net - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, plant and equipment, gross	$ 115,728	$ 145,224
Accumulated depreciation	(79,195)	(108,391)
Property, plant and equipment, net	36,533	36,833
Land [Member]
Property, plant and equipment, gross	348	1,098
Building and Building Improvements [Member]
Property, plant and equipment, gross	15,286	21,529
Machinery and Equipment [Member]
Property, plant and equipment, gross	98,527	118,358
Construction in Progress [Member]
Property, plant and equipment, gross	$ 1,567	$ 4,239

Note 10 - Income Taxes (Details

Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Unrecognized Tax Benefits	$ 19,823	$ 24,798	$ 28,434
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	3,500
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	400	600
Income Tax Expense (Benefit) on Reversal of Interest and Penalties	2,300	1,600
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	2,000	4,000
Income (Loss) from Continuing Operations before Income Taxes, Domestic	51,500	14,200
Income (Loss) from Continuing Operations before Income Taxes, Foreign	31,700	44,800
Deferred Tax Assets, Gross	26,017	24,125
Deferred Tax Assets, Operating Loss Carryforwards	4,303	4,316
Tax Credit Carryforward, Amount	600
Deferred Tax Assets, Tax Credit Carryforwards	600
Deferred Tax Assets, Valuation Allowance	2,009	$ 4,027
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	200
Federal and State and Local Authority [Member]
Operating Loss Carryforwards	15,100
Deferred Tax Assets, Operating Loss Carryforwards	$ 4,000

Note 10 - Income Taxes - Liabil

Note 10 - Income Taxes - Liability for Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Liability for uncertain tax positions	$ 24,798	$ 28,434
Additions based on tax positions related to the current year	973	1,284
Translation adjustment	(249)	(1,121)
Settlement/expiration of statutes of limitations	(5,699)	(3,799)
Liability for uncertain tax positions	$ 19,823	$ 24,798

Note 10 - Income Taxes - Provis

Note 10 - Income Taxes - Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Federal, current	$ 11,403	$ 9,175
State, current	975	787
Foreign, current	963	1,002
Current	13,341	10,964
Federal, deferred	(3,128)	(4,064)
State, deferred	(139)	(255)
Foreign, deferred	(605)	(275)
Deferred	(3,872)	(4,594)
Income Tax Expense (Benefit)	$ 9,469	$ 6,370

Note 10 - Income Taxes - Reconc

Note 10 - Income Taxes - Reconciliation of Taxes on Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Tax provision computed at the federal statutory rate, amount	$ 17,493	$ 12,402
Tax provision computed at the federal statutory rate, percent	21%	21%
Different tax rates applicable to foreign operations, amount	$ (1,697)	$ (1,677)
Different tax rates applicable to foreign operations, percent	(2.00%)	(3.00%)
Reversal of liability for uncertain tax positions - net, amount	$ (4,726)	$ (2,515)
Reversal of liability for uncertain tax positions - net, percent	(6.00%)	(4.00%)
Research and experimentation and foreign tax credits, amount	$ (75)	$ (139)
Research and experimentation and foreign tax credits, percent	(0.00%)	(0.00%)
State taxes, net of federal benefit, amount	$ (433)	$ 292
State taxes, net of federal benefit, percent	(1.00%)	0%
SERP/COLI and restricted stock income, amount	$ (756)	$ 733
SERP/COLI and restricted stock income, percent	(1.00%)	(1.00%)
SERP/COLI and restricted stock income, percent	1%	1%
Other, net, amount	$ (337)	$ (2,726)
Other, net, percent	(0.00%)	(5.00%)
Income Tax Expense (Benefit)	$ 9,469	$ 6,370
Tax provision (benefit) computed at the Company's effective tax rate, percent	11%	11%

Note 10 - Income Taxes - Compon

Note 10 - Income Taxes - Components of Deferred Income Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
State tax credits	$ 424	$ 571
Unfunded pension liability	(255)	(416)
Reserves and accruals	4,504	4,947
Federal, state and foreign net operating loss and credit carryforwards	4,303	4,316
Depreciation	435	437
Amortization	6,004	2,968
Lease accounting	4,605	4,816
Other accruals	5,997	6,486
Total deferred tax assets	26,017	24,125
Depreciation	2,331	2,227
Amortization	6,359	6,178
Lease accounting	4,659	4,889
Other accruals	562	780
Total deferred tax liabilities	13,911	14,074
Valuation allowance	2,009	4,027
Net deferred tax assets	$ 10,097	$ 6,024

Note 11 - Debt (Details Textual

Note 11 - Debt (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Sep. 02, 2021	Dec. 31, 2023	Dec. 31, 2022	Jan. 31, 2023	Jan. 01, 2023
Interest Rate Swap [Member]
Derivative, Notional Amount		$ 30,000
The 2021 Swaps [Member]
Derivative, Notional Amount		$ 60,000
The 2021 Swaps [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Derivative, Basis Spread on Variable Rate		0.10%
The 2021 Swaps One [Member]
Derivative, Notional Amount		$ 30,000
Derivative, Fixed Interest Rate		1.3055%		1.334%	1.334%
The 2021 Swaps Two [Member]
Derivative, Notional Amount		$ 30,000
Derivative, Fixed Interest Rate		1.318%		1.348%	1.348%
Revolving Credit Facility [Member]
Long-Term Line of Credit		$ 60,000	$ 95,000
Credit and Security Agreement with KeyBank [Member]
Interest Expense, Debt		$ 2,900	$ 3,400
Debt, Weighted Average Interest Rate		2.47%	5.51%
Long-Term Debt, Percentage Bearing Variable Interest, Amount		$ 0	$ 35,000
Debt Instrument, Interest Rate During Period		2.47%	3.57%
Line of Credit Facility, Percentage of Capital Stock of Foreign Subsidiaries Collateralized Security	65%
LIBOR Additional Rate		1%
Credit and Security Agreement with KeyBank [Member] | Minimum [Member]
Line of Credit Facility, Commitment Fee Percentage		0.20%
Credit and Security Agreement with KeyBank [Member] | Maximum [Member]
Line of Credit Facility, Commitment Fee Percentage		0.30%
Credit and Security Agreement with KeyBank [Member] | London Interbank Offered Rate (LIBOR) 1 [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate		1.125%
Credit and Security Agreement with KeyBank [Member] | London Interbank Offered Rate (LIBOR) 1 [Member] | Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate		2.125%
Credit and Security Agreement with KeyBank [Member] | Fed Funds Effective Rate Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate		0.50%
Credit and Security Agreement with KeyBank [Member] | LIBOR With Maturity of One Month [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate		0.125%
Credit and Security Agreement with KeyBank [Member] | LIBOR With Maturity of One Month [Member] | Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate		1.125%
Credit and Security Agreement with KeyBank [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 175,000
Debt Instrument, Term (Year)		5 years
Line of Credit Facility, Maximum Letters of Credit Capacity		$ 10,000
Line of Credit Facility, Maximum Swing Line Loan Capacity		5,000
Line of Credit Facility, Remaining Borrowing Capacity		$ 115,000	$ 80,000
Debt Instrument, Additional Borrowing Capacity	$ 100,000
Debt Instrument, Maximum Principal Borrowing Capacity in Foreign Currencies	$ 15,000

Note 11 - Debt - Scheduled Prin

Note 11 - Debt - Scheduled Principal Payments (Details) $ in Thousands	Dec. 31, 2023 USD ($)
2024	$ 0
2025	0
2026	60,000
2027	0
2028	0
Total long-term debt	60,000
Less: Current maturities of long-term debt	0
Noncurrent portion of long-term debt	$ 60,000

Note 12 - Accrued Expenses (Det

Note 12 - Accrued Expenses (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Restructuring Charges	$ 10,114
Restructuring Reserve	$ 5,498	$ 6,796

Note 12 - Accrued Expenses - Ac

Note 12 - Accrued Expenses - Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Salaries, bonuses and related benefits	$ 33,566	$ 27,422
Deferred revenue	3,046	8,847
Accrued restructuring costs	5,498	6,796
Sales commissions	2,347	2,521
Subcontracting labor	1,622	1,875
Warranty accrual	1,542	1,287
Other	7,036	2,125
Accrued Liabilities, Current	$ 54,657	$ 50,873

Note 12 - Accrued Expenses - _2

Note 12 - Accrued Expenses - Activity and Liability Balances Related to Restructuring Costs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Liability, beginning balance	$ 6,796
New charges	10,114
Cash payment and other settlements	(11,412)
Liability, ending balance	5,498
Employee Severance [Member]
Liability, beginning balance	3,390
New charges	7,590
Cash payment and other settlements	(9,429)
Liability, ending balance	1,551
Disposal Of Equipment [Member]
Liability, beginning balance	0
New charges	1,320
Cash payment and other settlements	(1,320)
Liability, ending balance	0
Other Restructuring [Member]
Liability, beginning balance	3,406
New charges	1,204
Cash payment and other settlements	(663)
Liability, ending balance	$ 3,947

Note 13 - Derivative Instrume_3

Note 13 - Derivative Instruments and Hedging Activities (Details Textual) - USD ($) $ in Millions	Dec. 31, 2023	Jan. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
Foreign Exchange Forward [Member]
Derivative, Notional Amount	$ 25.8			$ 25.7
The 2021 Swaps One [Member]
Derivative, Notional Amount	$ 30
Derivative, Fixed Interest Rate	1.3055%	1.334%	1.334%
The 2021 Swaps One [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Derivative, Basis Spread on Variable Rate		0.10%
The 2021 Swaps Two [Member]
Derivative, Notional Amount	$ 30
Derivative, Fixed Interest Rate	1.318%	1.348%	1.348%

Note 13 - Derivative Instrume_4

Note 13 - Derivative Instruments and Hedging Activities - Derivative Financial Instruments Effects on Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Net (losses) gains recognized in AOCL	$ 1,731	$ (575)
Foreign Exchange Forward [Member]
Net (losses) gains recognized in AOCL	(1,470)	(119)
Net losses reclassified from AOCL to the consolidated statement of operations	(537)	(805)
Interest Rate Swap [Member]
Net (losses) gains recognized in AOCL	689	5,886
Net losses reclassified from AOCL to the consolidated statement of operations	$ 2,268	$ 230

Note 13 - Derivative Instrume_5

Note 13 - Derivative Instruments and Hedging Activities - (Losses) Gains Recognized on Derivatives Instruments Not Designated as Hedging (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Derivative instruments gain (loss)	$ 150	$ 58
Foreign Exchange Forward [Member] | Nonoperating Income (Expense) [Member]
Derivative instruments gain (loss)	$ 150	$ 58

Note 14 - Segments (Details Tex

Note 14 - Segments (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Number of Industry in which Entity Operates	1
Number of Operating Segments	3
Number of Reportable Segments	3
Revenue from Contract with Customer, Excluding Assessed Tax	$ 639,813	$ 654,233
Asia [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 93,501	$ 156,413
Assets, Total [Member] | Geographic Concentration Risk [Member] | Asia [Member]
Concentration Risk, Percentage	21.60%
Revenue, Segment Benchmark [Member] | Customer Concentration Risk [Member]
Number of Customers	1
Revenue from Contract with Customer, Excluding Assessed Tax	$ 83,900
Revenue, Segment Benchmark [Member] | Customer Concentration Risk [Member] | One Customer [Member]
Concentration Risk, Percentage	12.80%

Note 14 - Segments - Segments (

Note 14 - Segments - Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Net sales	$ 639,813	$ 654,233
Gross Profit	$ 215,849	$ 183,453
Gross Profit %	33.70%	28%
Total Assets	$ 571,631	$ 560,466
Capital Expenditures	12,126	8,832
Depreciation and amortization	13,312	14,863
Power Solutions and Protection Segment [Member]
Net sales	314,105	288,366
Gross Profit	$ 119,741	$ 87,840
Gross Profit %	38.10%	30.50%
Total Assets	$ 222,068	$ 234,095
Capital Expenditures	4,563	3,916
Depreciation and amortization	5,280	6,470
Connectivity Solutions [Member]
Net sales	210,572	187,085
Gross Profit	$ 72,031	$ 48,488
Gross Profit %	34.20%	25.90%
Total Assets	$ 197,045	$ 170,895
Capital Expenditures	7,384	4,566
Depreciation and amortization	6,152	6,145
Magnetic Solutions Segment [Member]
Net sales	115,136	178,782
Gross Profit	$ 25,314	$ 49,290
Gross Profit %	22%	27.60%
Total Assets	$ 47,900	$ 107,891
Capital Expenditures	160	350
Depreciation and amortization	1,094	2,133
Corporate Segment [Member]
Net sales	0	0
Gross Profit	(1,237)	(2,165)
Total Assets	104,618	47,585
Capital Expenditures	19	0
Depreciation and amortization	$ 786	$ 115

Note 14 - Segments - Net Sales

Note 14 - Segments - Net Sales to External Customers by Geographic Area and by Major Product Line (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Net sales	$ 639,813	$ 654,233
Power Solutions and Protection [Member]
Net sales	314,105	288,366
Connectivity Solutions [Member]
Net sales	210,572	187,085
Magnetic Solutions [Member]
Net sales	115,136	178,782
UNITED STATES
Net sales	447,793	409,199
CHINA
Net sales	43,109	77,061
MACAO
Net sales	35,026	61,744
UNITED KINGDOM
Net sales	25,648	21,903
SLOVAKIA
Net sales	35,555	22,120
GERMANY
Net sales	17,327	24,112
INDIA
Net sales	15,365	17,608
SWITZERLAND
Net sales	11,237	9,893
All Other Foreign Countries [Member]
Net sales	$ 8,753	$ 10,593

Note 14 - Segments - Long-lived

Note 14 - Segments - Long-lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Long-lived assets	$ 69,652	$ 71,016
UNITED STATES
Long-lived assets	34,990	33,875
CHINA
Long-lived assets	23,621	28,222
SLOVAKIA
Long-lived assets	7,468	6,738
UNITED KINGDOM
Long-lived assets	3,024	1,109
All Other Foreign Countries [Member]
Long-lived assets	$ 549	$ 1,072

Note 15 - Retirement Fund and_3

Note 15 - Retirement Fund and Profit Sharing Plan (Details Textual) $ in Thousands	12 Months Ended		24 Months Ended
	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2023 USD ($) shares
Supplemental Employee Retirement Plan [Member]
Deferred Compensation Arrangement with Individual, Compensation Expense			$ 100
Defined Benefit Plan, Percentage of Average Base Compensation Five Consecutive Years, Normal Retirement	40%
Defined Benefit Plan, Number of Monthly Payments	120
Percentage of Participant's Annual Base Salary Received by Beneficiary, One Year From Date of Death	100%
Percentage of Participant's Annual Base Salary Received by Beneficiary, Following Four Years From Date of Death	50%
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 1,326	$ 1,451
Defined Benefit Plan, Accumulated Benefit Obligation	18,100	17,000	18,100
Investments, Fair Value Disclosure	15,400	14,000	15,400
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	800		800
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	$ 0		$ 0
Bel Fuse Inc. Employees' Savings Plan [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent Of Match, First 1% Employee Contribution	100%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match, Next 5% Employee Contribution	50%
Defined Contribution Plan, Cost	$ 1,300	1,300
Bel Fuse Inc. Employees' Savings Plan [Member] | Common Class A [Member]
Shares Held in Plan (in shares) | shares	287,777		287,777
Bel Fuse Inc. Employees' Savings Plan [Member] | Common Class B [Member]
Shares Held in Plan (in shares) | shares	65,089		65,089
Nonqualified Deferred Compensation Plan [Member]
Deferred Compensation Arrangement, Vesting Age	65		65
Deferred Compensation Plan Assets	$ 1,000	700	$ 1,000
Nonqualified Deferred Compensation Plan [Member] | Maximum [Member]
Deferred Compensation Arrangement with Individual, Compensation Expense	200	100
Retirement Fund Covering Hong Kong-based Employees [Member]
Defined Contribution Plan, Cost	$ 1,500	$ 1,800
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	5%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	7%
Retirement Fund Covering Hong Kong-based Employees [Member] | Minimum [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	5%
Retirement Fund Covering Hong Kong-based Employees [Member] | Common Class A [Member]
Shares Held in Plan (in shares) | shares	0	3,323	0
Retirement Fund Covering Hong Kong-based Employees [Member] | Common Class B [Member]
Shares Held in Plan (in shares) | shares		17,342

Note 15 - Retirement, Savings a

Note 15 - Retirement, Savings and Deferred Compensation Plans - Components of SERP Expense (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Service Cost	$ 369	$ 503
Interest Cost	886	636
Net amortization	71	312
Net periodic benefit cost	$ 1,326	$ 1,451

Note 15 - Retirement Fund and_4

Note 15 - Retirement Fund and Profit Sharing Plan - Changes in Plan Assets and Benefit Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Actuarial loss (gain)	$ 828	$ (5,938)
Supplemental Employee Retirement Plan [Member]
Company contributions	775	606
Benefits paid	(775)	(606)
Benefit obligation	18,175	23,580
Service Cost	369	503
Interest Cost	886	636
Benefits paid	(775)	(606)
Benefit obligation	19,484	18,175
Underfunded status, December 31	$ (19,484)	$ (18,175)

Note 15 - Retirement Fund and_5

Note 15 - Retirement Fund and Profit Sharing Plan - Benefit Payments Expected to be Paid (Details) - Supplemental Employee Retirement Plan [Member] $ in Thousands	Dec. 31, 2023 USD ($)
2024	$ 972
2025	1,015
2026	1,033
2027	1,150
2028	1,321
2029-2033	$ 7,218

Note 15 - Retirement, Savings_2

Note 15 - Retirement, Savings and Deferred Compensation Plans - Amounts Recognized in Accumulated Other Comprehensive Loss (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Prior service cost	$ 212	$ 334
Net loss	(1,336)	(2,216)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	$ (1,124)	$ (1,882)

Note 15 - Retirement Fund and_6

Note 15 - Retirement Fund and Profit Sharing Plan - Weighted Average Assumptions Used in Determining the Periodic Net Cost and Benefit Obligation (Details) - Supplemental Employee Retirement Plan [Member]	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Discount rate, net periodic benefit cost	5%	2.75%
Rate of compensation increase, net periodic benefit cost	2.50%	2.50%
Discount rate, benefit obligation	4.75%	5%
Rate of compensation increase, benefit obligation	2.50%	2.50%

Note 16 - Share-based Compens_3

Note 16 - Share-based Compensation (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Restricted Stock [Member]
Share-Based Payment Arrangement, Expense	$ 3.5	$ 2.4
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, ForfeitureRate	5%
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount	$ 9.8
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	4 years 4 months 24 days
Restricted Stock [Member] | Share-Based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	25%
Common Class B [Member] | Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)	10,000	322,500
The 2020 Equity Compensation Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)	517,000
The 2020 Equity Compensation Plan [Member] | Common Class B [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)	1,000,000

Note 16 - Share-based Compens_4

Note 16 - Share-based Compensation - Summary of Restricted Stock Activity (Details) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Outstanding, shares (in shares)	636,500
Outstanding, weighted average award price (in dollars per share)	$ 26.31
Outstanding, weighted average remaining contractual term (Year)	3 years 8 months 12 days	4 years 4 months 24 days
Granted, shares (in shares)	10,000
Granted, weighted average award price (in dollars per share)	$ 49.19
Vested, shares (in shares)	(119,250)
Vested, weighted average award price (in dollars per share)	$ 17.96
Forfeited, shares (in shares)	(30,500)
Forfeited, weighted average award price (in dollars per share)	$ 21.3
Outstanding, shares (in shares)	496,750	636,500
Outstanding, weighted average award price (in dollars per share)	$ 29.09	$ 26.31

Note 17 - Common Stock (Details

Note 17 - Common Stock (Details Textual) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Dividends, Common Stock	$ 3.5	$ 3.4
Common Class A [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.24	$ 0.24
Common Class A [Member] | Quarterly Dividends [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.06
Common Class A [Member] | One Shareholder [Member]
Common Stock, Ownership, Percent	16.70%
Common Class B [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.28	$ 0.28
Common Class B [Member] | Quarterly Dividends [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.07

Note 18 - Leases (Details Textu

Note 18 - Leases (Details Textual)	12 Months Ended
	Dec. 31, 2023
Minimum [Member]
Operating and Finance Leases, Remaining Lease Term (Year)	1 year
Maximum [Member]
Operating and Finance Leases, Remaining Lease Term (Year)	8 years

Note 18 - Leases - Components o

Note 18 - Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Amortization of ROU assets - finance leases	$ 491	$ 448
Interest on lease liabilities - finance leases	121	137
Operating lease cost (cost resulting from lease payments)	8,127	8,426
Short-term lease cost	207	201
Variable lease cost (cost excluded from lease payments)	397	410
Total lease cost	$ 9,343	$ 9,622
Operating leases (in years) (Year)	4 years 3 months 18 days	5 years 1 month 6 days
Finance leases (in years) (Year)	4 years 3 months 18 days	4 years 10 months 24 days
Operating leases	6%	6%
Finance leases	6%	6.10%

Note 18 - Leases - Supplemental

Note 18 - Leases - Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Operating cash flows from operating leases	$ 8,090	$ 8,970
Operating cash flows from finance leases	121	137
Finance cash flows from finance leases	527	423
Operating leases	5,999	8,052
Finance leases	$ 199	$ 207

Note 18 - Leases - Supplement_2

Note 18 - Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Operating lease right-of-use assets	$ 20,481	$ 21,551
Operating lease liability, current	6,350	5,870
Operating lease liability, long-term	14,212	15,742
Total operating lease liabilities	20,562	21,612
Property, plant and equipment, gross	115,728	145,224
Accumulated depreciation	(79,195)	(108,391)
Property, plant and equipment, net	36,533	36,833
Total finance lease liabilities	1,912
Other Liabilities [Member]
Total operating lease liabilities	20,562
Other current liabilities	485	446
Other long-term liabilities	1,539	1,608
Total finance lease liabilities	2,024	2,054
Assets under Finance Lease [Member]
Property, plant and equipment, gross	3,484	3,096
Accumulated depreciation	(1,613)	(1,089)
Property, plant and equipment, net	$ 1,871	$ 2,007

Note 18 - Leases - Maturities o

Note 18 - Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
2024, operating leases	$ 6,658
2024, finance leases	705
2025, operating leases	5,954
2025, finance leases	439
2026, operating leases	4,381
2026, finance leases	411
2027, operating leases	2,342
2027, finance leases	324
2028, operating leases	1,240
2028, finance leases	263
Operating leases, Thereafter	1,976
Finance leases, Thereafter	4
Operating leases, Total undiscounted cash flows	22,551
Finance leases, Total undiscounted cash flows	2,146
Operating leases, Less imputed interest	(1,989)
Finance leases, Less imputed interest	(234)
Operating leases, Present value of lease liabilities	20,562	$ 21,612
Finance leases, Present value of lease liabilities	1,912
Other Liabilities [Member]
Operating leases, Present value of lease liabilities	20,562
Finance leases, Present value of lease liabilities	$ 2,024	$ 2,054

Note 19 - Commitments and Con_2

Note 19 - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	12 Months Ended			252 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 1994
Purchase Commitment, Remaining Minimum Amount Committed	$ 57.7	$ 113.4
Arezzo Revenue Agency [Member]
Loss Contingency, Estimate of Possible Loss		12
EOS Claim From Principal Commissioner of Customs [Member] | EOS Power Panama Inc. [Member]
Customs Duties and Imposed Fines			$ 0.9		$ 1.4
Payment for Customs Duties and Imposed Fines and Penalties				$ 0.5
Indemnification Period (Year)			7 years
Capital Addition Purchase Commitments [Member]
Long-Term Purchase Commitment, Amount	$ 5.8	$ 7.8

Note 20 - Accumulated Other C_3

Note 20 - Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Foreign currency translation adjustment, net of taxes of ($276) at December 31, 2023 and ($369) at December 31, 2022	$ (16,423)	$ (23,107)
Unrealized holding gains on interest rate swap cash flow hedge, net of taxes of $0 at December 31, 2023 and $0 at December 31, 2022	3,960	5,539
Unrealized holding gains on marketable securities, net of taxes of ($7) at December 31, 2023 and ($7) at December 31, 2022	19	18
Unfunded SERP liability, net of taxes of $718 at December 31, 2023 and $879 at December 31, 2022	407	1,004
Accumulated other comprehensive loss	$ (12,037)	$ (16,546)

Note 20 - Accumulated Other C_4

Note 20 - Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Details) (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Foreign currency translation adjustment, tax	$ (276)	$ (369)
Unrealized gains (losses) on interest rate swap cash flow hedge, tax	0	0
Unrealized holding gains on available-for-sale securities, tax	(7)	(7)
Change in unfunded SERP liabilityChange in unfunded SERP liability, tax, tax	$ 718	$ 879

Note 20 - Accumulated Other C_5

Note 20 - Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Balance		$ 262,346	$ 208,743
Net current period other comprehensive income (loss)		4,509	2,317
Balance		340,558	262,346
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance		(23,107)	(14,911)
Other comprehensive income (loss) before reclassifications		7,221	(7,391)
Amounts reclassified from accumulated other comprehensive income (loss)		(537)	(805)
Net current period other comprehensive income (loss)		6,684	(8,196)
Balance		(16,423)	(23,107)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance		5,539	(116)
Other comprehensive income (loss) before reclassifications		(1,579)	5,655
Amounts reclassified from accumulated other comprehensive income (loss)		0	0
Net current period other comprehensive income (loss)		(1,579)	5,655
Balance		3,960	5,539
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance		18	29
Other comprehensive income (loss) before reclassifications		1	(11)
Amounts reclassified from accumulated other comprehensive income (loss)	[1]	0	0
Net current period other comprehensive income (loss)		1	(11)
Balance		19	18
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance		1,004	(3,865)
Other comprehensive income (loss) before reclassifications		(542)	5,119
Amounts reclassified from accumulated other comprehensive income (loss)		(55)	(250)
Net current period other comprehensive income (loss)		(597)	4,869
Balance		407	1,004
AOCI Attributable to Parent [Member]
Balance		(16,546)	(18,863)
Other comprehensive income (loss) before reclassifications		5,101	3,372
Amounts reclassified from accumulated other comprehensive income (loss)		(592)	(1,055)
Net current period other comprehensive income (loss)		4,509	2,317
Balance		$ (12,037)	$ (16,546)
[1]This reclassification relates to the amortization of prior service costs and gains/losses associated with the Company's SERP plan. This expense is reflected in other expense, net on the accompanying consolidated statement of operations.

Note 21 - Subsequent Events (De

Note 21 - Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($) $ in Millions	Feb. 29, 2024	Jan. 31, 2024
Stock Repurchase Program, Authorized Amount	$ 25
Glen Rock, Pennsylvania Property [Member]
Real Estate, Held-for-Sale		$ 0.8
Common Class A [Member]
Stock Repurchase Program, Authorized Amount	4
Common Class B [Member]
Stock Repurchase Program, Authorized Amount	$ 21