Bel Fuse (BELFB) 10-K 12 Mar 21 2020 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 01, 2021	Jun. 30, 2020
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	2020
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	000-11676
Entity Address, Address Line One	206 Van Vorst Street
Entity Address, City or Town	Jersey City
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	07302
City Area Code	201
Local Phone Number	432-0463
Entity Incorporation, State or Country Code	NJ
Entity Tax Identification Number	22-1463699
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 124,300,000
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		10,204,602
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		2,144,912

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 84,939	$ 72,289
Accounts receivable, net of allowance for doubtful accounts of $1,036 and $1,171, at December 31, 2020 and 2019, respectively	71,372	76,092
Inventories	100,133	107,276
Unbilled receivables	14,135	16,318
Other current assets	9,637	11,206
Total current assets	280,216	283,181
Property, plant and equipment, net	34,501	41,943
Right-of-use assets	14,217	18,504
Intangible assets, net	65,789	72,364
Goodwill	23,966	21,993
Deferred income taxes	5,705	3,731
Other assets	29,472	27,201
Total assets	453,866	468,917
Current liabilities:
Accounts payable	39,774	44,169
Accrued expenses	28,476	26,918
Current maturities of long-term debt	5,286	5,489
Operating lease liability, current	6,591	7,377
Other current liabilities	7,409	6,265
Total current liabilities	87,536	90,218
Long-term liabilities:
Long-term debt	110,294	138,215
Operating lease liability, long-term	8,064	11,751
Liability for uncertain tax positions	26,089	26,901
Minimum pension obligation and unfunded pension liability	24,620	21,545
Deferred income taxes	1,030	1,726
Other long-term liabilities	10,434	10,510
Total liabilities	268,067	300,866
Commitments and contingencies
Stockholders' equity:
Preferred stock, no par value, 1,000,000 shares authorized; none issued	0	0
Additional paid-in capital	36,136	33,826
Retained earnings	166,491	157,063
Accumulated other comprehensive loss	(18,063)	(24,065)
Total stockholders' equity	185,799	168,051
Total liabilities and stockholders' equity	453,866	468,917
Common Class A [Member]
Stockholders' equity:
Common stock	214	214
Common Class B [Member]
Stockholders' equity:
Common stock	$ 1,021	$ 1,013

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accounts receivable, allowance for doubtful accounts	$ 1,036	$ 1,171
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)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares outstanding (in shares)	2,144,912	2,144,912
Common stock, treasury shares (in shares)	1,072,769	1,072,769
Common Class B [Member]
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	30,000,000	30,000,000
Common stock, shares outstanding (in shares)	10,208,602	10,127,602
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, 2020	Dec. 31, 2019
Net sales	$ 465,771	$ 492,412
Cost of sales	346,041	382,439
Gross profit	119,730	109,973
Research and development costs	23,611	26,925
Selling, general and administrative expenses	78,704	77,416
Impairment of goodwill	0	8,891
Restructuring charges	601	2,593
Gain on sale of property	(1,853)	(4,257)
Income (loss) from operations	18,667	(1,595)
Interest expense	(4,746)	(5,448)
Other expense, net	(1,785)	(259)
Earnings (loss) before (benefit) provision for income taxes	12,136	(7,302)
(Benefit) provision for income taxes	(659)	1,441
Net earnings (loss) available to common shareholders	12,795	(8,743)
Common Class A [Member]
Net earnings (loss) available to common shareholders	$ 2,089	$ (1,531)
Net earnings (loss) per common share:
Common shares - basic and diluted (in dollars per share)	$ 0.97	$ (0.71)
Weighted-average shares outstanding:
Common shares - basic and diluted (in shares)	2,145	2,167
Common Class B [Member]
Net earnings (loss) available to common shareholders	$ 10,706	$ (7,212)
Net earnings (loss) per common share:
Common shares - basic and diluted (in dollars per share)	$ 1.05	$ (0.71)
Weighted-average shares outstanding:
Common shares - basic and diluted (in shares)	10,185	10,117

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net earnings (loss)	$ 12,795	$ (8,743)
Other comprehensive income (loss):
Currency translation adjustment, net of taxes of $8 and $9	6,890	2,603
Unrealized holding losses on marketable securities arising during the period, net of taxes of $7 and $0	7	0
Change in unfunded SERP liability, net of taxes of $738 and ($422)	(895)	(1,367)
Other comprehensive income:	6,002	1,236
Comprehensive income (loss)	$ 18,797	$ (7,507)

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Loss) (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Foreign currency translation adjustment, tax expense	$ 8	$ 9
Unrealized loss on marketable securities arising during the period, tax	7	0
Change in unfunded SERP liability, tax	$ 738	$ (422)

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]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]Additional Paid-in Capital [Member]	Common Class B [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Common Stock, Common Class A [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Common Stock, Common Class B [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Common Stock, Common Class A [Member]	Common Stock, Common Class B [Member]	Additional Paid-in Capital [Member]	Total
Balance at Dec. 31, 2018													$ 463	$ (463)	$ 0	$ 0	$ 0	$ 0	$ 168,695	$ (24,838)	$ 217	$ 1,009	$ 31,387	$ 176,470
Net earnings (loss)						$ (1,531)						$ (7,212)							(8,743)	0	0	0	0	(8,743)
Cash dividends declared on common stock	$ (518)	$ 0	$ 0	$ 0	$ 0	(518)	$ (2,834)	$ 0	$ 0	$ 0	$ 0	(2,834)
Issuance of restricted common stock																			0	0	0	7	(7)	0
Repurchase of Class A common stock																			0	0	(3)	0	(445)	(448)
Forfeiture of restricted common stock																			0	0	0	(3)		0
Forfeiture of restricted common stock, APIC																							3
Foreign currency translation adjustment, net of taxes																			0	2,603	0	0	0	2,603
Stock-based compensation expense																			0	0	0	0	2,888	2,888
Change in unfunded SERP liability, net of taxes																			0	(1,367)	0	0	0	(1,367)
Unrealized holding losses on marketable securities arising during the year, net of taxes of $7																								0
Balance at Dec. 31, 2019																			157,063	(24,065)	214	1,013	33,826	168,051
Net earnings (loss)						2,089						10,706							12,795	0	0	0	0	12,795
Cash dividends declared on common stock	$ (515)	$ 0	$ 0	$ 0	$ 0	$ (515)	$ (2,852)	$ 0	$ 0	$ 0	$ 0	$ (2,852)
Issuance of restricted common stock																			0	0	0	11	(11)	0
Forfeiture of restricted common stock																			0	0	0	(3)		0
Forfeiture of restricted common stock, APIC																							3
Foreign currency translation adjustment, net of taxes																			0	6,890	0	0	0	6,890
Stock-based compensation expense																			0	0	0	0	2,318	2,318
Change in unfunded SERP liability, net of taxes																			0	(895)	0	0	0	(895)
Unrealized holding losses on marketable securities arising during the year, net of taxes of $7																			0	7	0	0	0	7
Balance at Dec. 31, 2020																			$ 166,491	$ (18,063)	$ 214	$ 1,021	$ 36,136	$ 185,799

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Common Class A [Member]
Dividends declared (in dollars per share)	$ 0.24	$ 0.24
Common Class B [Member]
Dividends declared (in dollars per share)	$ 0.28	$ 0.28
Foreign currency translation adjustment, tax expense	$ 8	$ 9
Change in unfunded SERP liability, tax	$ 738	$ (422)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Cash flows from operating activities:
Net earnings (loss)	$ 12,795	$ (8,743)
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Impairment of goodwill	0	8,891
Depreciation and amortization	16,423	16,471
Stock-based compensation	2,318	2,888
Amortization of deferred financing costs	654	466
Deferred income taxes	(1,743)	(2,172)
Unrealized losses (gains) on foreign currency revaluation	2,168	(110)
Gain on sale of property, plant and equipment	(1,694)	(4,194)
Other, net	1,259	1,522
Changes in operating assets and liabilities, net of effects of business combination:
Accounts receivable	5,397	19,298
Unbilled receivables	2,183	(519)
Inventories	9,690	17,087
Other current assets	4,468	(2,292)
Other assets	(1,587)	(1,392)
Accounts payable	(6,044)	(15,105)
Accrued expenses	1,021	(5,875)
Other liabilities	(1,460)	8,178
Income taxes payable	260	(9,949)
Net cash provided by operating activities	46,108	24,450
Cash flows from investing activities:
Purchase of property, plant and equipment	(5,476)	(9,891)
Payment for acquisition, net of cash acquired	0	(29,003)
Proceeds from disposal/sale of property, plant and equipment	3,961	5,807
Net cash used in investing activities	(1,515)	(33,087)
Cash flows from financing activities:
Dividends paid to common shareholders	(3,363)	(3,352)
Deferred financing costs	(600)	0
Borrowings under revolving credit line	0	44,000
Repayments under revolving credit line	(20,000)	(12,000)
Repayments of long-term debt	(8,179)	(2,974)
Purchase and retirement of Class A common stock	0	(448)
Net cash (used in) provided by financing activities	(32,142)	25,226
Effect of exchange rate changes on cash	199	1,789
Net increase in cash and cash equivalents	12,650	18,378
Cash and cash equivalents - beginning of year	72,289	53,911
Cash and cash equivalents - end of year	84,939	72,289
Supplemental cash flow information:
Income taxes, net of refunds received	2,649	4,686
Interest payments	4,131	4,850
Goodwill	23,966	21,993
Cash paid for acquisition, net of cash acquired	0	29,003
BCMZ Precision Engineering Limited [Member]
Cash flows from investing activities:
Payment for acquisition, net of cash acquired	0	(29,003)
Supplemental cash flow information:
Fair value of identifiable net assets acquired	0	18,909
Goodwill	0	10,287
Fair value of net assets acquired	0	29,196
Fair value of consideration transferred	0	29,196
Less: Cash acquired in acquisition		(193)
Cash paid for acquisition, net of cash acquired	$ 0	$ 29,003

Note 1 - Description of Busines

Note 1 - Description of Business and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
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 sell a broad array of products that power, protect and connect electronic circuits. These products are used in the networking, telecommunication, high-speed data transmission, commercial aerospace, military, broadcasting, transportation and consumer electronic industries around the world. We manage our operations by product group through our reportable operating segments, Cinch Connectivity Solutions, Power Solutions and Protection and Magnetic Solutions, in addition to a Corporate segment. All amounts included in the tables to these notes to consolidated financial statements, except per share amounts, are in thousands. Principles of Consolidation Reclassifications fourth 2020, December 31, 2020 2019, Use of Estimates not not may Cash Equivalents three $250,000. Allowance for Doubtful Accounts Effects of Foreign Currency not December 31, 2020 2019 Concentration of Credit Risk 12, We place temporary cash investments with quality financial institutions and commercial issuers of short-term paper and, by policy, limit the amount of credit exposure in any one Inventories Revenue Recognition Product Warranties one three 11, 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 14.5% and 15.4% at December 31, 2020 2019 We use the acquisition method of accounting for all business combinations and do not fourth Impairment and Disposal of Long-Lived Assets For indefinite-lived intangible assets, such as 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 4, Depreciation rom Income Taxes 9, We record net deferred tax assets to the extent we believe these assets will more-likely-than- not not We establish liabilities for tax contingencies when, despite the belief that our tax return positions are fully supported, it is more likely than not may may not Earnings (Loss) per Share two two two no December 31, 2020 2019 The earnings (loss) and weighted average shares outstanding used in the computation of basic and diluted earnings (loss) per share are as follows: Years Ended December 31, 2020 2019 Numerator: Net earnings (loss) $ 12,795 $ (8,743 ) Less dividends declared: Class A 515 518 Class B 2,852 2,834 Undistributed earnings (loss) $ 9,428 $ (12,095 ) Undistributed earnings (loss) allocation: Class A undistributed earnings (loss) $ 1,574 $ (2,049 ) Class B undistributed earnings (loss) 7,854 (10,046 ) Total undistributed earnings (loss) $ 9,428 $ (12,095 ) Net earnings (loss) allocation: Class A net earnings (loss) $ 2,089 $ (1,531 ) Class B net earnings (loss) 10,706 (7,212 ) Net earnings (loss) $ 12,795 $ (8,743 ) Denominator: Weighted average shares outstanding: Class A 2,145 2,167 Class B 10,185 10,117 Net earnings (loss) per share: Class A $ 0.97 $ (0.71 ) Class B $ 1.05 $ (0.71 ) Research and Development ("R&D") December 31, 2020 2019 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 5, Recently Issued Accounting Standards Recently Adopted Accounting Standards In August 2018, 2018 13, Fair Value Measurement (Topic 820 December 15, 2019. January 1, 2020. not In August 2018, 2018 15, Intangibles – Goodwill and Other-Internal-Use Software (Subtopic 350 40 December 15, 2019. January 1, 2020 not In February 2016, 2016 02, Leases (Topic 842 2016 02” December 15, 2018. The Company adopted ASU 2016 02, January 1, 2019 840 840. three not 12 Adoption of the new standard resulted in the recording of right-of-use assets in the amount of $20.7 million and lease liabilities related to our operating leases in the amount of $21.0 million on our consolidated balance sheet as of January 1, 2019. not 16, 842 2016 02. In February 2018, 2018 02, Income Statement – Reporting Comprehensive Income (Topic 220 December 22, 2017. December 15, 2018, January 1, 2019. January 1, 2019. not In May 2018, 2018 07, Compensation – Stock Compensation (Topic 718 December 15, 2018, January 1, 2019 not In January 2017, 2017 04, Intangibles-Goodwill and Other (Topic 350 2017 04” 2017 04 2 January 1, 2017. 2017 04 July 1, 2019 Note 4 Accounting Standards Issued But Not In June 2016, No. 2016 13, Financial Instruments – Credit Losses (Topic 326 2016 13” , December 15, 2022, 2016 13, not In August 2018, 2018 14, Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715 20 2018 14" not December 15, 2020. 2018 14 In December 2019, 2019 12, Simplifying the Accounting for Income Taxes 2019 12" 740 2019 12 December 15, 2021. 2019 12, not

Note 2 - Acquisitions

Note 2 - Acquisitions	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Business Combination Disclosure [Text Block]	2. ACQUISITIONS Agreement to Acquire EOS Power On November 25, 2020, 2020 first 2021. CUI Acquisition: On December 3, 2019, one The results of operations of the CUI power business have been included in the Company's consolidated financial statements for the period subsequent to its acquisition date. During the years ended December 31, 2020 December 31, 2019, 0.4) December 31, 2020 December 31, 2019, The accounting related to the acquisition of the CUI power business has been finalized. The following table depicts the Company’s acquisition date fair values of the combined consideration transferred and identifiable net assets acquired in this transaction: Measurement Acquisition-Date Acquisition-Date Period Fair Values Fair Values Adjustments (As adjusted) Total identifiable assets $ 9,764 $ 15,412 $ 25,176 Total liabilities assumed (6,855 ) - (6,855 ) Net identifiable assets acquired 2,909 15,412 18,321 Goodwill 29,091 (18,216 ) 10,875 Net assets acquired $ 32,000 $ (2,804 ) $ 29,196 Cash paid 32,000 (2,804 ) 29,196 Fair value of consideration transferred $ 32,000 $ (2,804 ) $ 29,196 The identifiable assets acquired included $11.0 million assigned to customer relationships, which is being amortized over its estimated future life of 13 years utilizing the straight-line method, and $5.0 million assigned to the CUI tradename, which is concluded to have an indefinite life. The goodwill noted above related to the CUI acquisition was allocated to the Company's Power Solutions and Protection operating segment at the time of acquisition. The Company has determined that all of the goodwill and intangible assets associated with the CUI acquisition will be deductible for tax purposes. The following unaudited pro forma information presents a summary of the combined results of operations of the Company and the results of CUI for the periods presented as if the acquisition had occurred on January 1, 2019, not may no not may Year Ended December 31, 2019 Revenue $ 522,128 Net loss (7,715 ) Loss per Class A common share - basic and diluted (0.63 ) Loss per Class B common share - basic and diluted (0.63 )

Note 3 - Revenue

Note 3 - Revenue	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	3. REVENUE Nature of Goods and Services Our revenues are substantially derived from sales of our products. In our Cinch 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 Power Solutions and Protection 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 Magnetic Solutions 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 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, 2020 Cinch Connectivity Power Solutions Magnetic Solutions and Protection Solutions Consolidated By Geographic Region: North America $ 112,663 $ 123,014 $ 29,999 $ 265,676 Europe 30,017 34,447 6,328 70,792 Asia 8,051 24,027 97,225 129,303 $ 150,731 $ 181,488 $ 133,552 $ 465,771 By Sales Channel: Direct to customer $ 95,853 $ 113,570 $ 108,727 $ 318,150 Through distribution 54,878 67,918 24,825 147,621 $ 150,731 $ 181,488 $ 133,552 $ 465,771 Year Ended December 31, 2019 Cinch Connectivity Power Solutions Magnetic Solutions and Protection Solutions Consolidated By Geographic Region: North America $ 128,096 $ 93,540 $ 34,408 $ 256,044 Europe 33,099 41,016 7,507 81,622 Asia 11,153 28,972 114,621 154,746 $ 172,348 $ 163,528 $ 156,536 $ 492,412 By Sales Channel: Direct to customer $ 113,115 $ 110,587 $ 132,911 $ 356,613 Through distribution 59,233 52,941 23,625 135,799 $ 172,348 $ 163,528 $ 156,536 $ 492,412 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 consignment 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, 2020 December 31, 2019 December 31, December 31, 2020 2019 Contract assets - current (unbilled receivable) $ 14,135 $ 16,318 Contract liabilities - current (deferred revenue) $ 2,077 $ 653 The change in balance of our unbilled receivables from December 31, 2019 December 31, 2020 A tabular presentation of the activity within the deferred revenue account for the year ended December 31, 2020 Year Ended December 31, 2020 Balance, January 1 $ 653 New advance payments received 7,798 Recognized as revenue during period (6,380 ) Currency translation 6 Balance, December 31 $ 2,077 Transaction Price Allocated to Future Obligations The aggregate amount of transaction price allocated to remaining performance obligations that have not December 31, 2020 one 2022 2025. 2022, 2023 2023. December 31, 2020 one

Note 4 - Goodwill and Other Int

Note 4 - Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Goodwill Disclosure [Text Block]	4. 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, 2020 2019, • Cinch Connectivity Solutions 2010 2012 2013 2014 not • Power Solutions and Protection 2012 2014 2019 not • Magnetic Solutions: 2013 not Prior to October 1, 2019, three October 1, 2019. October 1, 2019 The changes in the carrying value of goodwill classified by our segment reporting structure for the years ended December 31, 2020 2019 Total Cinch Connectivity Solutions Power Solutions & Protection Magnetic Solutions Balance at January 1, 2020: Goodwill, gross $ 21,993 $ 7,179 $ 14,814 $ - Accumulated impairment charges - - - - Goodwill, net $ 21,993 $ 7,179 $ 14,814 $ - Goodwill allocation related to acquisition 588 - 588 - Foreign currency translation 1,385 676 709 - Balance at December 31, 2020: Goodwill, gross $ 23,966 $ 7,855 $ 16,111 $ - Goodwill, net $ 23,966 $ 7,855 $ 16,111 $ - As discussed in Note 5, Fair Value Measurements fourth may not 2020 On October 1, 2020, one no The excess of estimated fair values over carrying value, including goodwill for each of our reporting units that had goodwill as of the 2020 Reporting Unit % by Which Estimated Fair Value Exceeds Carrying Value Connectivity Europe 51.1 % Power Europe 21.0 % CUI 38.6 % 2019 As weakened market conditions from earlier in 2019 third 2019 October 1, 2018), not 2019. third 2019. third 2019. No July 31, 2019 On October 1, 2019, one no October 1, 2019. one no As noted above, the fair value determined in connection with the goodwill impairment test completed in the fourth 2020 exceeded the carrying value for each reporting unit. Therefore, there was no may 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 decline in our common stock price, 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. Other intangible assets, excluding trademarks, are being amortized over 1 to 16 years. 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, 2020 The components of definite and indefinite-lived intangible assets are as follows: December 31, 2020 December 31, 2019 Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Amount Amortization Amount Amount Amortization Amount Patents, licenses and technology $ 39,056 $ 25,160 $ 13,896 $ 38,885 $ 21,757 $ 17,128 Customer relationships 56,261 21,280 34,981 55,656 17,231 38,425 Non-compete agreements 2,716 2,717 (1 ) 2,701 2,701 - Trademarks 16,953 40 16,913 16,852 40 16,812 $ 114,986 $ 49,197 $ 65,789 $ 114,094 $ 41,729 $ 72,365 Amortization expense was $7.1 million and $6.4 million in 2020 2019 Estimated amortization expense for intangible assets for the next five December 31, Amortization Expense 2021 $ 6,972 2022 5,673 2023 4,523 2024 4,461 2025 4,445 2020 2019 The Company completed its annual indefinite-lived intangible assets impairment test as of October 1, 2020 October 1, 2019, no third 2019, July 31, 2019, no December 31, 2020 December 31, 2019, no

Note 5 - Fair Value Measurement

Note 5 - Fair Value Measurements	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Fair Value Disclosures [Text Block]	5. FAIR VALUE MEASUREMENTS As of December 31, 2020 December 31, 2019, 1 December 31, 2020 December 31, 2019. second 2020, December 31, 2020. not 3, no 1, 2 3 2020 2019. no 2020. There were no December 31, 2020 December 31, 2019. The Company has other financial instruments, such as cash and cash equivalents, accounts receivable, restricted cash, accounts payable and accrued expenses, which are not December 31, 2020 2019, not December 31, 2020. 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. We review goodwill for impairment on a reporting unit basis annually during the fourth may not 2019 third 2019 October 1, 2018), not 2019. third 2019. no July 31, 2019 The Company’s Level 3 two 4, The July 31, 2019 third 2019. September 30, 2019 orting unit. Effective October 1, 2019, October 1, 2019 no Not 4,

Note 6 - Other Assets

Note 6 - Other Assets	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Other Assets Disclosure [Text Block]	6. OTHER ASSETS At December 31, 2020 2019 December 31, 2020 2019 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 December 31, 2020 2019 December 31, 2020 2019 fourth 2020, fourth 2020, Other Investments At December 31, 2020 2019 December 31, 2020 2019

Note 7 - Inventories

Note 7 - Inventories	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Inventory Disclosure [Text Block]	7. INVENTORIES The components of inventories are as follows: December 31, 2020 2019 Raw materials $ 40,846 $ 47,936 Work in progress 25,916 27,065 Finished goods 33,371 32,275 Inventories $ 100,133 $ 107,276

Note 8 - Property, Plant and Eq

Note 8 - Property, Plant and Equipment, Net	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	8. PROPERTY, PLANT AND EQUIPMENT, NET Property, plant and equipment, net consist of the following: December 31, 2020 2019 Land $ 1,115 $ 1,431 Buildings and improvements 19,917 29,722 Machinery and equipment 124,114 132,134 Construction in progress 1,603 5,090 146,749 168,377 Accumulated depreciation (112,248 ) (126,434 ) Property, plant and equipment, net $ 34,501 $ 41,943 Depreciation expense for the years ended December 31, 2020 2019

Note 9 - Income Taxes

Note 9 - Income Taxes	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Income Tax Disclosure [Text Block]	9. 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 2017 2014. no 2010 2012 At December 31, 2020 2019, December 31, 2020, 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: Year Ended December 31, 2020 2019 Liability for uncertain tax positions - January 1 $ 29,061 $ 28,951 Additions based on tax positions related to the current year 764 1,738 Translation adjustment 887 (211 ) Settlement/expiration of statutes of limitations (2,196 ) (1,417 ) Liability for uncertain tax positions - December 31 $ 28,516 $ 29,061 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, 2020 2019, December 31, 2020 2019, December 31, 2020 2019, The Company’s total earnings (loss) before provision for income taxes included losses from domestic operations of ($6.0) million and ($17.1) million for 2020 2019, 2020 2019, The provision (benefit) for income taxes consists of the following: Years Ended December 31, 2020 2019 Current: Federal $ (1,555 ) $ (215 ) State 168 141 Foreign 2,472 3,687 1,085 3,613 Deferred: Federal (1,412 ) (2,222 ) State (151 ) (135 ) Foreign (181 ) 185 (1,744 ) (2,172 ) $ (659 ) $ 1,441 A reconciliation of taxes on income computed at the U.S. federal statutory rate to amounts provided is as follows: Years Ended December 31, 2020 2019 $ % $ % Tax provision (benefit) computed at the federal statutory rate $ 2,549 21 % $ (1,534 ) 21 % Increase (decrease) in taxes resulting from: Different tax rates applicable to foreign operations 311 3 % 2,978 (41 %) (Reversal of) increase in liability for uncertain tax positions - net (1,432 ) (12 %) 320 (4 %) Impact of U.S. Tax Reform (1,129 ) (9 %) - 0 % Research and experimentation and foreign tax credits (245 ) (2 %) (907 ) 12 % State taxes, net of federal benefit 4 0 % (54 ) 1 % SERP/COLI and restricted stock income (234 ) (2 %) (547 ) 7 % Impairment of goodwill - 0 % 1,522 (21 %) Other, net (483 ) (4 %) (337 ) 5 % Tax (benefit) provision computed at the Company's effective tax rate $ (659 ) (5 %) $ 1,441 (20 %) As of December 31, 2020, not not 2025 2040 2028 2040. Management has no December 31, 2020. December 31, 2020. not Components of deferred income tax assets are as follows: December 31, 2020 2019 Tax Effect Tax Effect Deferred tax assets: State tax credits $ 757 $ 1,046 Unfunded pension liability 1,840 1,102 Reserves and accruals 3,181 2,721 Federal, state and foreign net operating loss and credit carryforwards 7,744 8,042 Depreciation 604 686 Amortization 142 698 Lease accounting 3,217 3,961 Other accruals 5,452 5,079 Total deferred tax assets 22,937 23,335 Deferred tax liabilities: Depreciation 1,992 1,901 Amortization 6,541 6,973 Lease accounting 3,110 3,871 Other accruals 330 370 Total deferred tax liabilities 11,973 13,115 Valuation allowance 6,289 8,216 Net deferred tax assets $ 4,675 $ 2,004

Note 10 - Debt

Note 10 - Debt	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Debt Disclosure [Text Block]	10. DEBT At December 31, 2020 2019 December 31, 2020 December 31, 2019 December 31, 2020 2019 The interest rate in effect at December 31, 2020 December 31, 2019 December 31, 2020 2019 2014 On June 19, 2014, June 30, 2014 "2014 2014 2014 June 18, 2019. 2014 2016 In March 2016, 2014 2016 2015, 2014 September 2016. 2014 first 2016. 2017 On December 11, 2017, 2014 December 11, 2022, ( first four "2017 2017 2017 2014 2014 fourth 2017. Under the terms of the 2017 The obligations of the Company under the 2017 first The borrowings under the 2017 1 2 one The 2017 2020 On February 18, 2020, At December 31, 2020 Scheduled principal payments of the total debt outstanding at December 31, 2020 2021 $ 5,948 2022 110,887 Total long-term debt 116,835 Less: Current maturities of long-term debt (5,948 ) Noncurrent portion of long-term debt $ 110,887

Note 11 - Accrued Expenses

Note 11 - Accrued Expenses	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Accounts Payable and Accrued Liabilities Disclosure [Text Block]	11. ACCRUED EXPENSES Accrued expenses consist of the following: December 31, 2020 2019 Sales commissions $ 2,574 $ 2,542 Subcontracting labor 758 990 Salaries, bonuses and related benefits 17,165 14,715 Warranty accrual 1,010 1,576 Other 6,969 7,095 $ 28,476 $ 26,918 The change in warranty accrual during 2020 There were no 2020 .

Note 12 - Segments

Note 12 - Segments	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	12. SEGMENTS The Company operates in one three three Year Ended December 31, 2020 Connectivity Power Solutions Magnetic Corporate Solutions and Protection Solutions Segment Total Net sales $ 150,731 $ 181,488 $ 133,552 $ - $ 465,771 Gross Profit 42,200 45,587 33,072 (1,129 ) 119,730 Gross Profit % 28.0 % 25.1 % 24.8 % nm 25.7 % Total Assets 137,333 180,939 92,538 43,056 453,866 Capital Expenditures 1,955 2,458 1,063 - 5,476 Depreciation and Amortization Expense 5,700 8,611 2,112 16,423 Year Ended December 31, 2019 Connectivity Power Solutions Magnetic Corporate Solutions and Protection Solutions Segment Total Net sales $ 172,348 $ 163,528 $ 156,536 $ - $ 492,412 Gross Profit 44,417 32,846 34,350 (1,640 ) 109,973 Gross Profit % 25.8 % 20.1 % 21.9 % nm 22.3 % Total Assets 145,344 168,422 89,463 65,688 468,917 Capital Expenditures 2,934 4,570 2,387 9,891 Depreciation and Amortization Expense 6,021 7,858 2,592 16,471 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, 2020 2019 Net Sales by Geographic Location: United States $ 265,676 $ 256,044 Macao 129,303 154,745 United Kingdom 22,017 24,877 Slovakia 17,609 22,705 Germany 13,582 14,855 Switzerland 8,612 10,654 All other foreign countries 8,972 8,532 Consolidated net sales $ 465,771 $ 492,412 Net Sales by Major Product Line: Connectivity solutions $ 150,731 $ 172,348 Magnetic solutions 133,552 156,536 Power solutions and protection 181,488 163,528 Consolidated net sales $ 465,771 $ 492,412 The following is a summary of long-lived assets by geographic area as of December 31, 2020 2019 December 31, 2020 2019 Long-lived Assets by Geographic Location: United States $ 26,748 $ 27,377 People's Republic of China (PRC) 28,711 30,245 Slovakia 5,514 5,726 Switzerland 87 2,339 United Kingdom 1,715 2,053 All other foreign countries 1,148 1,123 Consolidated long-lived assets $ 63,923 $ 68,863 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. Net Sales to Major Customers The Company had net sales to one ten 2020 2019 2020 2019

Note 13 - Retirement Fund and P

Note 13 - Retirement Fund and Profit Sharing Plan	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Retirement Benefits [Text Block]	13. 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, 2020 2019 $1.1 December 31, 2020 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 or Company stock. The expense for the years ended December 31, 2020 2019 December 31, 2020 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 6, 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, 2020 2019 Net Periodic Benefit Cost December 31, 2020 2019 Years Ended December 31, 2020 2019 Service Cost $ 600 $ 576 Interest Cost 636 739 Net amortization 343 192 Net periodic benefit cost $ 1,579 $ 1,507 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 (expense) income, net in the accompanying consolidated statements of operations. Obligations and Funded Status December 31, 2020 2019 Years Ended December 31, 2020 2019 Fair value of plan assets, January 1 $ - $ - Company contributions 446 430 Benefits paid (446 ) (430 ) Fair value of plan assets, December 31 $ - $ - Benefit obligation, January 1 $ 21,541 $ 18,676 Service cost 600 576 Interest cost 636 739 Benefits paid (446 ) (430 ) Plan amendments - - Actuarial losses 1,977 1,980 Benefit obligation, December 31 $ 24,308 $ 21,541 Underfunded status, December 31 $ (24,308 ) $ (21,541 ) The Company has recorded the 2020 2019 December 31, 2020 December 31, 2019 December 31, 2020 2019 6, 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 $0.5 million. The Company expects to make contributions of $0.5 million to the SERP in 2021. no not 2021, no The following benefit payments, which reflect expected future service, are expected to be paid: Years Ending December 31, 2021 $ 675 2022 919 2023 921 2024 959 2025 999 2026 - 2030 5,642 The following gross amounts are recognized net of tax in accumulated other comprehensive loss: December 31, 2020 2019 Prior service cost $ 586 $ 738 Net loss 1,773 1,965 $ 2,359 $ 2,703 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, 2020 2019 Net periodic benefit cost: Discount rate 3.00 % 4.00 % Rate of compensation increase 2.50 % 2.50 % Benefit obligation: Discount rate 2.25 % 3.00 % Rate of compensation increase 2.50 % 2.50 %

Note 14 - Share-based Compensat

Note 14 - Share-based Compensation	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	14. 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, 2020, 2020 2011 December 31, 2020 no 2011 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 $2.3 million and $2.9 million for 2020 2019 not 2020 2019 December 31, 2020 2019 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 2020 2019 A summary of the restricted stock activity under the Program for the year ended December 31, 2020 Weighted Average Restricted Stock Weighted Average Remaining Awards Shares Award Price Contractual Term (Years) Outstanding at January 1, 2020 445,300 $ 23.96 3.4 years Granted 113,000 8.24 Vested (120,850 ) 24.10 Forfeited (32,000 ) 20.52 Outstanding at December 31, 2020 405,450 $ 19.77 3.0 years As of December 31, 2020 The Company's policy is to issue new shares to satisfy restricted stock awards. Currently the Company believes that the majority of its restricted stock awards will vest.

Note 15 - Common Stock

Note 15 - Common Stock	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	15. COMMON STOCK As of December 31, 2020 one 10% no 10% not 1998 90 December 31, 2020 not 10%. December 31, 2020 not 10%. not Throughout 2020 2019 2020 2019 no not

Note 16 - Leases

Note 16 - Leases	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Lessee, Operating Leases [Text Block]	16. 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: Year Ended December 31, 2020 Amortization of ROU assets - finance leases $ 205 Interest on lease liabilities - finance leases 65 Operating lease cost (cost resulting from lease payments) 8,113 Short-term lease cost 189 Variable lease cost (cost excluded from lease payments) 270 Sublease income - Total lease cost $ 8,842 Supplemental cash flow information related to leases are as follows: Year Ended December 31, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 8,022 Operating cash flows from finance leases 65 Finance cash flows from finance leases 185 Right-of-use assets obtained in exchange for lease obligations: Operating leases 3,384 Finance leases 451 Supplemental balance sheet information related to leases was as follows: December 31, 2020 Operating Leases: Operating lease right-of-use assets $ 14,217 Operating lease liability, current 6,591 Operating lease liability, long-term 8,064 Total operating lease liabilities $ 14,655 Finance Leases: Property, plant and equipment, gross $ 966 Accumulated depreciation (391 ) Property, plant and equipment, net $ 575 Other current liabilities $ 198 Other long-term liabilities 790 Total finance lease liabilities $ 988 December 31, 2020 Weighted-Average Remaining Lease Term: Operating leases (in years) 2.7 Finance leases (in years) 4.6 Weighted-Average Discount Rate: Operating leases 6.0 % Finance leases 6.3 % Our discount rate is based on our incremental borrowing rate, as adjusted based on the geographic regions in which our leases assets are located. Maturities of lease liabilities were as follows as of December 31, 2020 Year Ending Operating Finance December 31, Leases Leases 2021 $ 7,575 $ 280 2022 4,655 264 2023 2,421 264 2024 883 248 2025 260 78 Thereafter 315 80 Total undiscounted cash flows 16,109 1,214 Less imputed interest (1,454 ) (226 ) Present value of lease liabilities $ 14,655 $ 988

Note 17 - Commitments and Conti

Note 17 - Commitments and Contingencies	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	17. 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 December 31, 2020 December 31, 2019 December 31, 2020 December 31, 2019 Legal Proceedings The Company is party to a number of legal actions and claims, none In connection with the acquisition of Power Solutions, there is an ongoing claim by the Arezzo Revenue Agency in Italy concerning certain tax matters related to what was then Power-One Asia Pacific Electronics Shenzhen Co. Ltd. (now Bel Power Solutions Asia Pacific Electronics Shenzhen Co. Ltd, or "BPS China") for the years 2004 2006. September 2012, February 2013, October 2, 2014. October 13, 2014, July 18, 2015 December 5, 2016, January 4, 2017. December 31, 2020 December 31, 2019 June 1, 2018, January 23, 2015 December 17, 2018 January 10, 2019. The Company is not

Note 18 - Accumulated Other Com

Note 18 - Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Comprehensive Income (Loss) Note [Text Block]	18. ACCUMULATED OTHER COMPREHENSIVE LOSS The components of accumulated other comprehensive loss as of December 31, 2020 2019 December 31, 2020 2019 Foreign currency translation adjustment $ (13,142 ) $ (20,032 ) Unrealized holding gains on available-for-sale securities, net of taxes of $0 $0 19 12 Unfunded SERP liability, net of taxes of ($1,377) ($639) (4,940 ) (4,045 ) Accumulated other comprehensive loss $ (18,063 ) $ (24,065 ) Changes in accumulated other comprehensive (loss) income by component during the years ended December 31, 2020 2019 Unrealized Holding Foreign Currency Gains on Translation Available-for- Unfunded Adjustment Sale Securities SERP Liability Total Balance at January 1, 2019 $ (22,635) $ 12 $ (2,215) $ (24,838) Other comprehensive income (loss) before reclassifications 2,603 - (1,492) 1,111 Amounts reclassified from accumulated other comprehensive income (loss) - - 125 (a) 125 Effect of adoption of ASU 2018-02 (Topic 220) - - (463) (463) Net current period other comprehensive income (loss) 2,603 - (1,830) 773 Balance at December 31, 2019 (20,032) 12 (4,045) (24,065) Other comprehensive income (loss) before reclassifications 6,890 7 (933) 5,964 Amounts reclassified from accumulated other comprehensive income (loss) - - 38 (a) 38 Net current period other comprehensive income (loss) 6,890 7 (895) 6,002 Balance at December 31, 2020 $ (13,142) $ 19 $ (4,940) $ (18,063) (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) income, net on the accompanying consolidated statement of operations.

Note 19 - Subsequent Events

Note 19 - Subsequent Events	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
Subsequent Events [Text Block]	19. SUBSEQUENT EVENTS Acquisition of rms Connectors, Inc. On January 8, 2021, 30 not 10 Sale of Hong Kong Property and Related Bank Consent On January 15, 2021, first 2021. February 3, 2021,

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Principles of Consolidation
Reclassification, Comparability Adjustment [Policy Text Block]	Reclassifications fourth 2020, December 31, 2020 2019,
Use of Estimates, Policy [Policy Text Block]	Use of Estimates not not may
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash Equivalents three $250,000.
Receivable [Policy Text Block]	Allowance for Doubtful Accounts
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Effects of Foreign Currency not December 31, 2020 2019
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Concentration of Credit Risk 12, We place temporary cash investments with quality financial institutions and commercial issuers of short-term paper and, by policy, limit the amount of credit exposure in any one
Inventory, Policy [Policy Text Block]	Inventories
Revenue from Contract with Customer [Policy Text Block]	Revenue Recognition
Standard Product Warranty, Policy [Policy Text Block]	Product Warranties one three 11,
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 14.5% and 15.4% at December 31, 2020 2019 We use the acquisition method of accounting for all business combinations and do not fourth
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Impairment and Disposal of Long-Lived Assets For indefinite-lived intangible assets, such as 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 4,
Depreciation, Depletion, and Amortization [Policy Text Block]	Depreciation rom
Income Tax, Policy [Policy Text Block]	Income Taxes 9, We record net deferred tax assets to the extent we believe these assets will more-likely-than- not not We establish liabilities for tax contingencies when, despite the belief that our tax return positions are fully supported, it is more likely than not may may not
Earnings Per Share, Policy [Policy Text Block]	Earnings (Loss) per Share two two two no December 31, 2020 2019 The earnings (loss) and weighted average shares outstanding used in the computation of basic and diluted earnings (loss) per share are as follows: Years Ended December 31, 2020 2019 Numerator: Net earnings (loss) $ 12,795 $ (8,743 ) Less dividends declared: Class A 515 518 Class B 2,852 2,834 Undistributed earnings (loss) $ 9,428 $ (12,095 ) Undistributed earnings (loss) allocation: Class A undistributed earnings (loss) $ 1,574 $ (2,049 ) Class B undistributed earnings (loss) 7,854 (10,046 ) Total undistributed earnings (loss) $ 9,428 $ (12,095 ) Net earnings (loss) allocation: Class A net earnings (loss) $ 2,089 $ (1,531 ) Class B net earnings (loss) 10,706 (7,212 ) Net earnings (loss) $ 12,795 $ (8,743 ) Denominator: Weighted average shares outstanding: Class A 2,145 2,167 Class B 10,185 10,117 Net earnings (loss) per share: Class A $ 0.97 $ (0.71 ) Class B $ 1.05 $ (0.71 )
Research and Development Expense, Policy [Policy Text Block]	Research and Development ("R&D") December 31, 2020 2019
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 5,
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Issued Accounting Standards Recently Adopted Accounting Standards In August 2018, 2018 13, Fair Value Measurement (Topic 820 December 15, 2019. January 1, 2020. not In August 2018, 2018 15, Intangibles – Goodwill and Other-Internal-Use Software (Subtopic 350 40 December 15, 2019. January 1, 2020 not In February 2016, 2016 02, Leases (Topic 842 2016 02” December 15, 2018. The Company adopted ASU 2016 02, January 1, 2019 840 840. three not 12 Adoption of the new standard resulted in the recording of right-of-use assets in the amount of $20.7 million and lease liabilities related to our operating leases in the amount of $21.0 million on our consolidated balance sheet as of January 1, 2019. not 16, 842 2016 02. In February 2018, 2018 02, Income Statement – Reporting Comprehensive Income (Topic 220 December 22, 2017. December 15, 2018, January 1, 2019. January 1, 2019. not In May 2018, 2018 07, Compensation – Stock Compensation (Topic 718 December 15, 2018, January 1, 2019 not In January 2017, 2017 04, Intangibles-Goodwill and Other (Topic 350 2017 04” 2017 04 2 January 1, 2017. 2017 04 July 1, 2019 Note 4 Accounting Standards Issued But Not In June 2016, No. 2016 13, Financial Instruments – Credit Losses (Topic 326 2016 13” , December 15, 2022, 2016 13, not In August 2018, 2018 14, Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715 20 2018 14" not December 15, 2020. 2018 14 In December 2019, 2019 12, Simplifying the Accounting for Income Taxes 2019 12" 740 2019 12 December 15, 2021. 2019 12, not

Note 1 - Description of Busin_2

Note 1 - Description of Business and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Years Ended December 31, 2020 2019 Numerator: Net earnings (loss) $ 12,795 $ (8,743 ) Less dividends declared: Class A 515 518 Class B 2,852 2,834 Undistributed earnings (loss) $ 9,428 $ (12,095 ) Undistributed earnings (loss) allocation: Class A undistributed earnings (loss) $ 1,574 $ (2,049 ) Class B undistributed earnings (loss) 7,854 (10,046 ) Total undistributed earnings (loss) $ 9,428 $ (12,095 ) Net earnings (loss) allocation: Class A net earnings (loss) $ 2,089 $ (1,531 ) Class B net earnings (loss) 10,706 (7,212 ) Net earnings (loss) $ 12,795 $ (8,743 ) Denominator: Weighted average shares outstanding: Class A 2,145 2,167 Class B 10,185 10,117 Net earnings (loss) per share: Class A $ 0.97 $ (0.71 ) Class B $ 1.05 $ (0.71 )

Note 2 - Acquisitions (Tables)

Note 2 - Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	Measurement Acquisition-Date Acquisition-Date Period Fair Values Fair Values Adjustments (As adjusted) Total identifiable assets $ 9,764 $ 15,412 $ 25,176 Total liabilities assumed (6,855 ) - (6,855 ) Net identifiable assets acquired 2,909 15,412 18,321 Goodwill 29,091 (18,216 ) 10,875 Net assets acquired $ 32,000 $ (2,804 ) $ 29,196 Cash paid 32,000 (2,804 ) 29,196 Fair value of consideration transferred $ 32,000 $ (2,804 ) $ 29,196
Business Acquisition, Pro Forma Information [Table Text Block]	Year Ended December 31, 2019 Revenue $ 522,128 Net loss (7,715 ) Loss per Class A common share - basic and diluted (0.63 ) Loss per Class B common share - basic and diluted (0.63 )

Note 3 - Revenue (Tables)

Note 3 - Revenue (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Disaggregation of Revenue [Table Text Block]	Year Ended December 31, 2020 Cinch Connectivity Power Solutions Magnetic Solutions and Protection Solutions Consolidated By Geographic Region: North America $ 112,663 $ 123,014 $ 29,999 $ 265,676 Europe 30,017 34,447 6,328 70,792 Asia 8,051 24,027 97,225 129,303 $ 150,731 $ 181,488 $ 133,552 $ 465,771 By Sales Channel: Direct to customer $ 95,853 $ 113,570 $ 108,727 $ 318,150 Through distribution 54,878 67,918 24,825 147,621 $ 150,731 $ 181,488 $ 133,552 $ 465,771 Year Ended December 31, 2019 Cinch Connectivity Power Solutions Magnetic Solutions and Protection Solutions Consolidated By Geographic Region: North America $ 128,096 $ 93,540 $ 34,408 $ 256,044 Europe 33,099 41,016 7,507 81,622 Asia 11,153 28,972 114,621 154,746 $ 172,348 $ 163,528 $ 156,536 $ 492,412 By Sales Channel: Direct to customer $ 113,115 $ 110,587 $ 132,911 $ 356,613 Through distribution 59,233 52,941 23,625 135,799 $ 172,348 $ 163,528 $ 156,536 $ 492,412
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]	December 31, December 31, 2020 2019 Contract assets - current (unbilled receivable) $ 14,135 $ 16,318 Contract liabilities - current (deferred revenue) $ 2,077 $ 653 Year Ended December 31, 2020 Balance, January 1 $ 653 New advance payments received 7,798 Recognized as revenue during period (6,380 ) Currency translation 6 Balance, December 31 $ 2,077

Note 4 - Goodwill and Other I_2

Note 4 - Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Goodwill [Table Text Block]	Total Cinch Connectivity Solutions Power Solutions & Protection Magnetic Solutions Balance at January 1, 2020: Goodwill, gross $ 21,993 $ 7,179 $ 14,814 $ - Accumulated impairment charges - - - - Goodwill, net $ 21,993 $ 7,179 $ 14,814 $ - Goodwill allocation related to acquisition 588 - 588 - Foreign currency translation 1,385 676 709 - Balance at December 31, 2020: Goodwill, gross $ 23,966 $ 7,855 $ 16,111 $ - Goodwill, net $ 23,966 $ 7,855 $ 16,111 $ -
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 Connectivity Europe 51.1 % Power Europe 21.0 % CUI 38.6 %
Schedule of Finite-Lived Intangible Assets [Table Text Block]	December 31, 2020 December 31, 2019 Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Amount Amortization Amount Amount Amortization Amount Patents, licenses and technology $ 39,056 $ 25,160 $ 13,896 $ 38,885 $ 21,757 $ 17,128 Customer relationships 56,261 21,280 34,981 55,656 17,231 38,425 Non-compete agreements 2,716 2,717 (1 ) 2,701 2,701 - Trademarks 16,953 40 16,913 16,852 40 16,812 $ 114,986 $ 49,197 $ 65,789 $ 114,094 $ 41,729 $ 72,365
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	December 31, Amortization Expense 2021 $ 6,972 2022 5,673 2023 4,523 2024 4,461 2025 4,445

Note 7 - Inventories (Tables)

Note 7 - Inventories (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Inventory, Current [Table Text Block]	December 31, 2020 2019 Raw materials $ 40,846 $ 47,936 Work in progress 25,916 27,065 Finished goods 33,371 32,275 Inventories $ 100,133 $ 107,276

Note 8 - Property, Plant and _2

Note 8 - Property, Plant and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Property, Plant and Equipment [Table Text Block]	December 31, 2020 2019 Land $ 1,115 $ 1,431 Buildings and improvements 19,917 29,722 Machinery and equipment 124,114 132,134 Construction in progress 1,603 5,090 146,749 168,377 Accumulated depreciation (112,248 ) (126,434 ) Property, plant and equipment, net $ 34,501 $ 41,943

Note 9 - Income Taxes (Tables)

Note 9 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	Year Ended December 31, 2020 2019 Liability for uncertain tax positions - January 1 $ 29,061 $ 28,951 Additions based on tax positions related to the current year 764 1,738 Translation adjustment 887 (211 ) Settlement/expiration of statutes of limitations (2,196 ) (1,417 ) Liability for uncertain tax positions - December 31 $ 28,516 $ 29,061
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Years Ended December 31, 2020 2019 Current: Federal $ (1,555 ) $ (215 ) State 168 141 Foreign 2,472 3,687 1,085 3,613 Deferred: Federal (1,412 ) (2,222 ) State (151 ) (135 ) Foreign (181 ) 185 (1,744 ) (2,172 ) $ (659 ) $ 1,441
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Years Ended December 31, 2020 2019 $ % $ % Tax provision (benefit) computed at the federal statutory rate $ 2,549 21 % $ (1,534 ) 21 % Increase (decrease) in taxes resulting from: Different tax rates applicable to foreign operations 311 3 % 2,978 (41 %) (Reversal of) increase in liability for uncertain tax positions - net (1,432 ) (12 %) 320 (4 %) Impact of U.S. Tax Reform (1,129 ) (9 %) - 0 % Research and experimentation and foreign tax credits (245 ) (2 %) (907 ) 12 % State taxes, net of federal benefit 4 0 % (54 ) 1 % SERP/COLI and restricted stock income (234 ) (2 %) (547 ) 7 % Impairment of goodwill - 0 % 1,522 (21 %) Other, net (483 ) (4 %) (337 ) 5 % Tax (benefit) provision computed at the Company's effective tax rate $ (659 ) (5 %) $ 1,441 (20 %)
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	December 31, 2020 2019 Tax Effect Tax Effect Deferred tax assets: State tax credits $ 757 $ 1,046 Unfunded pension liability 1,840 1,102 Reserves and accruals 3,181 2,721 Federal, state and foreign net operating loss and credit carryforwards 7,744 8,042 Depreciation 604 686 Amortization 142 698 Lease accounting 3,217 3,961 Other accruals 5,452 5,079 Total deferred tax assets 22,937 23,335 Deferred tax liabilities: Depreciation 1,992 1,901 Amortization 6,541 6,973 Lease accounting 3,110 3,871 Other accruals 330 370 Total deferred tax liabilities 11,973 13,115 Valuation allowance 6,289 8,216 Net deferred tax assets $ 4,675 $ 2,004

Note 10 - Debt (Tables)

Note 10 - Debt (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Maturities of Long-term Debt [Table Text Block]	2021 $ 5,948 2022 110,887 Total long-term debt 116,835 Less: Current maturities of long-term debt (5,948 ) Noncurrent portion of long-term debt $ 110,887

Note 11 - Accrued Expenses (Tab

Note 11 - Accrued Expenses (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Accrued Liabilities [Table Text Block]	December 31, 2020 2019 Sales commissions $ 2,574 $ 2,542 Subcontracting labor 758 990 Salaries, bonuses and related benefits 17,165 14,715 Warranty accrual 1,010 1,576 Other 6,969 7,095 $ 28,476 $ 26,918

Note 12 - Segments (Tables)

Note 12 - Segments (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Year Ended December 31, 2020 Connectivity Power Solutions Magnetic Corporate Solutions and Protection Solutions Segment Total Net sales $ 150,731 $ 181,488 $ 133,552 $ - $ 465,771 Gross Profit 42,200 45,587 33,072 (1,129 ) 119,730 Gross Profit % 28.0 % 25.1 % 24.8 % nm 25.7 % Total Assets 137,333 180,939 92,538 43,056 453,866 Capital Expenditures 1,955 2,458 1,063 - 5,476 Depreciation and Amortization Expense 5,700 8,611 2,112 16,423 Year Ended December 31, 2019 Connectivity Power Solutions Magnetic Corporate Solutions and Protection Solutions Segment Total Net sales $ 172,348 $ 163,528 $ 156,536 $ - $ 492,412 Gross Profit 44,417 32,846 34,350 (1,640 ) 109,973 Gross Profit % 25.8 % 20.1 % 21.9 % nm 22.3 % Total Assets 145,344 168,422 89,463 65,688 468,917 Capital Expenditures 2,934 4,570 2,387 9,891 Depreciation and Amortization Expense 6,021 7,858 2,592 16,471
Revenue from External Customers by Geographic Areas [Table Text Block]	Years Ended December 31, 2020 2019 Net Sales by Geographic Location: United States $ 265,676 $ 256,044 Macao 129,303 154,745 United Kingdom 22,017 24,877 Slovakia 17,609 22,705 Germany 13,582 14,855 Switzerland 8,612 10,654 All other foreign countries 8,972 8,532 Consolidated net sales $ 465,771 $ 492,412 Net Sales by Major Product Line: Connectivity solutions $ 150,731 $ 172,348 Magnetic solutions 133,552 156,536 Power solutions and protection 181,488 163,528 Consolidated net sales $ 465,771 $ 492,412
Long-lived Assets by Geographic Areas [Table Text Block]	December 31, 2020 2019 Long-lived Assets by Geographic Location: United States $ 26,748 $ 27,377 People's Republic of China (PRC) 28,711 30,245 Slovakia 5,514 5,726 Switzerland 87 2,339 United Kingdom 1,715 2,053 All other foreign countries 1,148 1,123 Consolidated long-lived assets $ 63,923 $ 68,863

Note 13 - Retirement Fund and_2

Note 13 - Retirement Fund and Profit Sharing Plan (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Net Benefit Costs [Table Text Block]	Years Ended December 31, 2020 2019 Service Cost $ 600 $ 576 Interest Cost 636 739 Net amortization 343 192 Net periodic benefit cost $ 1,579 $ 1,507
Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets [Table Text Block]	Years Ended December 31, 2020 2019 Fair value of plan assets, January 1 $ - $ - Company contributions 446 430 Benefits paid (446 ) (430 ) Fair value of plan assets, December 31 $ - $ - Benefit obligation, January 1 $ 21,541 $ 18,676 Service cost 600 576 Interest cost 636 739 Benefits paid (446 ) (430 ) Plan amendments - - Actuarial losses 1,977 1,980 Benefit obligation, December 31 $ 24,308 $ 21,541 Underfunded status, December 31 $ (24,308 ) $ (21,541 )
Schedule of Expected Benefit Payments [Table Text Block]	Years Ending December 31, 2021 $ 675 2022 919 2023 921 2024 959 2025 999 2026 - 2030 5,642
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]	December 31, 2020 2019 Prior service cost $ 586 $ 738 Net loss 1,773 1,965 $ 2,359 $ 2,703
Defined Benefit Plan, Assumptions [Table Text Block]	Years Ended December 31, 2020 2019 Net periodic benefit cost: Discount rate 3.00 % 4.00 % Rate of compensation increase 2.50 % 2.50 % Benefit obligation: Discount rate 2.25 % 3.00 % Rate of compensation increase 2.50 % 2.50 %

Note 14 - Share-based Compens_2

Note 14 - Share-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2020
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 (Years) Outstanding at January 1, 2020 445,300 $ 23.96 3.4 years Granted 113,000 8.24 Vested (120,850 ) 24.10 Forfeited (32,000 ) 20.52 Outstanding at December 31, 2020 405,450 $ 19.77 3.0 years

Note 16 - Leases (Tables)

Note 16 - Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Lease, Cost [Table Text Block]	Year Ended December 31, 2020 Amortization of ROU assets - finance leases $ 205 Interest on lease liabilities - finance leases 65 Operating lease cost (cost resulting from lease payments) 8,113 Short-term lease cost 189 Variable lease cost (cost excluded from lease payments) 270 Sublease income - Total lease cost $ 8,842 December 31, 2020 Weighted-Average Remaining Lease Term: Operating leases (in years) 2.7 Finance leases (in years) 4.6 Weighted-Average Discount Rate: Operating leases 6.0 % Finance leases 6.3 %
Leases, Supplemental Cash Flow Information [Table Text Block]	Year Ended December 31, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 8,022 Operating cash flows from finance leases 65 Finance cash flows from finance leases 185 Right-of-use assets obtained in exchange for lease obligations: Operating leases 3,384 Finance leases 451
Lease, Supplemental Balance Sheet Information [Table Text Block]	December 31, 2020 Operating Leases: Operating lease right-of-use assets $ 14,217 Operating lease liability, current 6,591 Operating lease liability, long-term 8,064 Total operating lease liabilities $ 14,655 Finance Leases: Property, plant and equipment, gross $ 966 Accumulated depreciation (391 ) Property, plant and equipment, net $ 575 Other current liabilities $ 198 Other long-term liabilities 790 Total finance lease liabilities $ 988
Lessee, Operating and Financing Lease Liability Maturity [Table Text Block]	Year Ending Operating Finance December 31, Leases Leases 2021 $ 7,575 $ 280 2022 4,655 264 2023 2,421 264 2024 883 248 2025 260 78 Thereafter 315 80 Total undiscounted cash flows 16,109 1,214 Less imputed interest (1,454 ) (226 ) Present value of lease liabilities $ 14,655 $ 988

Note 18 - Accumulated Other C_2

Note 18 - Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	December 31, 2020 2019 Foreign currency translation adjustment $ (13,142 ) $ (20,032 ) Unrealized holding gains on available-for-sale securities, net of taxes of $0 $0 19 12 Unfunded SERP liability, net of taxes of ($1,377) ($639) (4,940 ) (4,045 ) Accumulated other comprehensive loss $ (18,063 ) $ (24,065 )
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component [Table Text Block]	Unrealized Holding Foreign Currency Gains on Translation Available-for- Unfunded Adjustment Sale Securities SERP Liability Total Balance at January 1, 2019 $ (22,635) $ 12 $ (2,215) $ (24,838) Other comprehensive income (loss) before reclassifications 2,603 - (1,492) 1,111 Amounts reclassified from accumulated other comprehensive income (loss) - - 125 (a) 125 Effect of adoption of ASU 2018-02 (Topic 220) - - (463) (463) Net current period other comprehensive income (loss) 2,603 - (1,830) 773 Balance at December 31, 2019 (20,032) 12 (4,045) (24,065) Other comprehensive income (loss) before reclassifications 6,890 7 (933) 5,964 Amounts reclassified from accumulated other comprehensive income (loss) - - 38 (a) 38 Net current period other comprehensive income (loss) 6,890 7 (895) 6,002 Balance at December 31, 2020 $ (13,142) $ 19 $ (4,940) $ (18,063)

Note 1 - Description of Busin_3

Note 1 - Description of Business and Summary of Significant Accounting Policies (Details Textual) - USD ($) shares in Thousands, $ in Thousands	Jan. 01, 2019	Dec. 31, 2020	Dec. 31, 2019
Cost of Goods and Services Sold, Total		$ 346,041	$ 382,439
Nonoperating Income (Expense), Total		(1,785)	(259)
Selling, General and Administrative Expense, Total		78,704	77,416
Foreign Currency Transaction Gain (Loss), before Tax, Total		$ (2,168)	$ 110
Intangible Assets, Percent of Total Assets		14.50%	15.40%
Excessive Dividend Rate of Class B Over Class A		5.00%
Excessive Undistributed Earnings Allocation Rate of Class B Over Class A		5.00%
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		0	0
Research and Development Expense, Total		$ 23,611	$ 26,925
Operating Lease, Right-of-Use Asset		14,217	$ 18,504
Operating Lease, Liability, Total		$ 14,655
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset	$ 20,700
Operating Lease, Liability, Total	21,000
Accounting Standards Update 2018-02 [Member]
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect	$ 500
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)		2 years
Maximum [Member]
Standard Product Warranty, Period (Year)		3 years
Finite-Lived Intangible Asset, Useful Life (Year)		16 years	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)		15 years
Revision of Prior Period, Adjustment [Member]
Cost of Goods and Services Sold, Total		$ (1,100)
Nonoperating Income (Expense), Total		$ 1,100	$ 2,100
Selling, General and Administrative Expense, Total			$ (2,100)

Note 1 - Description of Busin_4

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, 2020	Dec. 31, 2019
Net earnings (loss)	$ 12,795	$ (8,743)
Undistributed earnings (loss)	9,428	(12,095)
Common Class A [Member]
Net earnings (loss)	2,089	(1,531)
Less dividends declared	515	518
Undistributed earnings (loss)	$ 1,574	$ (2,049)
Weighted-average shares outstanding, basic and diluted (in shares)	2,145	2,167
Net earnings per share, basic and diluted (in dollars per share)	$ 0.97	$ (0.71)
Common Class B [Member]
Net earnings (loss)	$ 10,706	$ (7,212)
Less dividends declared	2,852	2,834
Undistributed earnings (loss)	$ 7,854	$ (10,046)
Weighted-average shares outstanding, basic and diluted (in shares)	10,185	10,117
Net earnings per share, basic and diluted (in dollars per share)	$ 1.05	$ (0.71)

Note 2 - Acquisitions (Details

Note 2 - Acquisitions (Details Textual) - USD ($) $ in Thousands	Dec. 03, 2019	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020
EOS Power Panama Inc. [Member] | Forecast [Member]
Business Combination, Consideration Transferred, Total		$ 7,000
Majority Products Business of CUI Power [Member]
Business Combination, Consideration Transferred, Total	$ 32,000				$ 29,196
Payments to Acquire Businesses, Gross	32,000				$ 29,196
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			$ 43,100	$ 2,200
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual			6,800	400
Business Combination, Acquisition Related Costs			200	$ 200
Majority Products Business of CUI Power [Member] | Trade Names [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	5,000
Majority Products Business of CUI Power [Member] | Customer Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 11,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)	13 years
EOS Power Panama Inc. [Member]
Revenues, Total			$ 12,000

Note 2 - Acquisitions - Identif

Note 2 - Acquisitions - Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 03, 2019	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2019
Goodwill, Ending Balance		$ 23,966	$ 21,993	$ 10,800
Majority Products Business of CUI Power [Member]
Total identifiable assets	$ 9,764	25,176
Total identifiable assets		15,412
Total liabilities assumed	(6,855)	(6,855)
Net identifiable assets acquired	2,909	18,321
Net identifiable assets acquired		15,412
Goodwill, Ending Balance	29,091	10,875
Goodwill		(18,216)
Net assets acquired	32,000	29,196
Net assets acquired		(2,804)
Payments to Acquire Businesses, Gross	32,000	29,196
Cash paid		(2,804)
Business Combination, Consideration Transferred, Total	$ 32,000	29,196
Fair value of consideration transferred		$ (2,804)

Note 2 - Acquisitions - Proform

Note 2 - Acquisitions - Proforma Results (Details) - Majority Products Business of CUI Power [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)$ / shares
Revenue | $	$ 522,128
Net loss | $	$ (7,715)
Common Class A [Member]
Loss per Class A common share - basic and diluted (in dollars per share) | $ / shares	$ (0.63)
Common Class B [Member]
Loss per Class A common share - basic and diluted (in dollars per share) | $ / shares	$ (0.63)

Note 3 - Revenue 1 (Details Tex

Note 3 - Revenue 1 (Details Textual) $ in Millions	Dec. 31, 2020USD ($)
Revenue, Remaining Performance Obligation, Amount	$ 8.6

Note 3 - Revenue 2 (Details Tex

Note 3 - Revenue 2 (Details Textual)	Dec. 31, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Percentage	63.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Percentage	6.00%

Note 3 - Revenue - Disaggregati

Note 3 - Revenue - Disaggregation of Revenue by Product Group and Sales Channel (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net sales	$ 465,771	$ 492,412
Sales Channel, Directly to Consumer [Member]
Net sales	318,150	356,613
Sales Channel, Through Intermediary [Member]
Net sales	147,621	135,799
Connectivity Solutions [Member]
Net sales	150,731	172,348
Connectivity Solutions [Member] | Sales Channel, Directly to Consumer [Member]
Net sales	95,853	113,115
Connectivity Solutions [Member] | Sales Channel, Through Intermediary [Member]
Net sales	54,878	59,233
Power Solutions and Protection [Member]
Net sales	181,488	163,528
Power Solutions and Protection [Member] | Sales Channel, Directly to Consumer [Member]
Net sales	113,570	110,587
Power Solutions and Protection [Member] | Sales Channel, Through Intermediary [Member]
Net sales	67,918	52,941
Magnetic Solutions [Member]
Net sales	133,552	156,536
Magnetic Solutions [Member] | Sales Channel, Directly to Consumer [Member]
Net sales	108,727	132,911
Magnetic Solutions [Member] | Sales Channel, Through Intermediary [Member]
Net sales	24,825	23,625
North America [Member]
Net sales	265,676	256,044
North America [Member] | Connectivity Solutions [Member]
Net sales	112,663	128,096
North America [Member] | Power Solutions and Protection [Member]
Net sales	123,014	93,540
North America [Member] | Magnetic Solutions [Member]
Net sales	29,999	34,408
Europe [Member]
Net sales	70,792	81,622
Europe [Member] | Connectivity Solutions [Member]
Net sales	30,017	33,099
Europe [Member] | Power Solutions and Protection [Member]
Net sales	34,447	41,016
Europe [Member] | Magnetic Solutions [Member]
Net sales	6,328	7,507
Asia [Member]
Net sales	129,303	154,746
Asia [Member] | Connectivity Solutions [Member]
Net sales	8,051	11,153
Asia [Member] | Power Solutions and Protection [Member]
Net sales	24,027	28,972
Asia [Member] | Magnetic Solutions [Member]
Net sales	$ 97,225	$ 114,621

Note 3 - Revenue - Contract Ass

Note 3 - Revenue - Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Contract assets - current (unbilled receivable)	$ 14,135	$ 16,318
Contract liabilities - current (deferred revenue)	2,077	$ 653
Balance, January 1	653
New advance payments received	7,798
Recognized as revenue during period	(6,380)
Currency translation	6
Balance, December 31	$ 2,077

Note 4 - Goodwill and Other I_3

Note 4 - Goodwill and Other Intangible Assets (Details Textual) $ in Thousands	Oct. 01, 2019	Jul. 31, 2019USD ($)	Dec. 31, 2020USD ($)	Sep. 30, 2019USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Number of Operating Segments	3				3
Goodwill, Impairment Loss			$ 0
Amortization of Intangible Assets, Total					$ 7,100	$ 6,400
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)					$ 0	$ 0
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)					1 year
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)					16 years	16 years
North America [Member]
Goodwill, Impairment Loss				$ 8,900
Europe [Member]
Goodwill, Impairment Loss		$ 0
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		17.30%

Note 4 - Goodwill and Other I_4

Note 4 - Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2019
Goodwill, gross	$ 23,966	$ 21,993
Accumulated impairment charges		0
Goodwill	23,966	21,993	$ 10,800
Goodwill allocation related to acquisition	588
Foreign currency translation	1,385
North America [Member]
Goodwill, gross	7,855	7,179
Accumulated impairment charges		0
Goodwill	7,855	7,179
Goodwill allocation related to acquisition	0
Foreign currency translation	676
Asia [Member]
Goodwill, gross	16,111	14,814
Accumulated impairment charges		0
Goodwill	16,111	14,814
Goodwill allocation related to acquisition	588
Foreign currency translation	709
Europe [Member]
Goodwill, gross	0	0
Accumulated impairment charges		0
Goodwill	0	$ 0
Goodwill allocation related to acquisition	0
Foreign currency translation	$ 0

Note 4 - Goodwill and Other I_5

Note 4 - Goodwill and Other Intangible Assets - Estimated Fair Values Over Carrying Value, Including Goodwill (Details) - Europe [Member]	Dec. 31, 2020	Jul. 31, 2019
% by Which Estimated Fair Value Exceeds Carrying Value		17.30%
Cinch Connectivity Solutions Segment [Member]
% by Which Estimated Fair Value Exceeds Carrying Value	51.10%
Power Solutions and Protection Segment [Member]
% by Which Estimated Fair Value Exceeds Carrying Value	21.00%
CUI Power [Member]
% by Which Estimated Fair Value Exceeds Carrying Value	38.60%

Note 4 - Goodwill and Other I_6

Note 4 - Goodwill and Other Intangible Assets - Components of Definite and Indefinite-lived Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Gross carrying amount	$ 114,986	$ 114,094
Accumulated amortization	49,197	41,729
Net carrying amount	65,789	72,365
Trademarks [Member]
Trademarks, gross	16,953	16,852
Trademarks, Accumulated amortization	40	40
Trademarks, Net carrying amount	16,913	16,812
Patents, Licenses and Technology [Member]
Gross carrying amount	39,056	38,885
Accumulated amortization	25,160	21,757
Net carrying amount	13,896	17,128
Customer Relationships [Member]
Gross carrying amount	56,261	55,656
Accumulated amortization	21,280	17,231
Net carrying amount	34,981	38,425
Noncompete Agreements [Member]
Gross carrying amount	2,716	2,701
Accumulated amortization	2,717	2,701
Net carrying amount	$ 1	$ 0

Note 4 - Goodwill and Other I_7

Note 4 - Goodwill and Other Intangible Assets - Estimated Amortization Expense (Details) $ in Thousands	Dec. 31, 2020USD ($)
2021	$ 6,972
2022	5,673
2023	4,523
2024	4,461
2025	$ 4,445

Note 5 - Fair Value Measureme_2

Note 5 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Sep. 30, 2019	Dec. 31, 2019
Long-term Debt, Fair Value	$ 118,400		$ 146,400
Long-term Debt, Gross	115,600		143,700
Goodwill, Impairment Loss	0
Goodwill, Ending Balance	23,966	$ 10,800	21,993
North America Reporting Unit [Member]
Goodwill, Impairment Loss		8,900
Goodwill, Impairment Loss, Net of Tax		$ 8,500
Fair Value, Nonrecurring [Member]
Assets, Fair Value Disclosure	0		0
Foreign Exchange Forward [Member]
Derivative Asset, Total	100
Investments Held in Rabbi Trust [Member]
Debt Securities, Available-for-sale, Total	$ 700		$ 1,100

Note 6 - Other Assets (Details

Note 6 - Other Assets (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash Surrender Value, Fair Value Disclosure	$ 14,700	$ 13,700
Increase (Decrease) in Cash Surrender Value	1,400	2,400
Investments Held in Rabbi Trust [Member]
Debt Securities, Available-for-sale, Amortized Cost, Total	700	1,100
Debt Securities, Available-for-sale, Total	700	1,100
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan, Benefit Obligation, Ending Balance	24,308	21,541	$ 18,676
Investments, Fair Value Disclosure, Total	$ 15,400	$ 14,700

Note 7 - Inventories - Componen

Note 7 - Inventories - Components of Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Raw materials	$ 40,846	$ 47,936
Work in progress	25,916	27,065
Finished goods	33,371	32,275
Inventories	$ 100,133	$ 107,276

Note 8 - Property, Plant and _3

Note 8 - Property, Plant and Equipment, Net (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Depreciation, Total	$ 9.3	$ 10

Note 8 - Property, Plant and _4

Note 8 - Property, Plant and Equipment, Net - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, plant and equipment, gross	$ 146,749	$ 168,377
Accumulated depreciation	(112,248)	(126,434)
Property, plant and equipment, net	34,501	41,943
Land [Member]
Property, plant and equipment, gross	1,115	1,431
Building and Building Improvements [Member]
Property, plant and equipment, gross	19,917	29,722
Machinery and Equipment [Member]
Property, plant and equipment, gross	124,114	132,134
Construction in Progress [Member]
Property, plant and equipment, gross	$ 1,603	$ 5,090

Note 9 - Income Taxes (Details

Note 9 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Unrecognized Tax Benefits, Ending Balance		$ 28,516	$ 29,061	$ 28,951
Liability for Uncertainty in Income Taxes, Current		2,400	2,200
Liability for Uncertainty in Income Taxes, Noncurrent		26,089	26,901
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total		800	700
Income Tax Expense (Benefit) on Reversal of Interest and Penalties		500	700
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total		5,200	4,900
Income (Loss) from Continuing Operations before Income Taxes, Domestic		(6,000)	(17,100)
Income (Loss) from Continuing Operations before Income Taxes, Foreign		18,100	9,800
Deferred Tax Assets, Gross, Total		22,937	23,335
Deferred Tax Assets, Operating Loss Carryforwards, Total		7,744	8,042
Tax Credit Carryforward, Amount		2,600
Deferred Tax Assets, Tax Credit Carryforwards, Total		600
Deferred Tax Assets, Valuation Allowance, Total		6,289	$ 8,216
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount		200
Federal and State and Local Authority [Member]
Operating Loss Carryforwards, Total		27,500
Deferred Tax Assets, Operating Loss Carryforwards, Total		$ 5,900
Forecast [Member]
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	$ 2,400

Note 9 - Income Taxes - Liabili

Note 9 - Income Taxes - Liability for Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Liability for uncertain tax positions	$ 29,061	$ 28,951
Additions based on tax positions related to the current year	764	1,738
Translation adjustment	887
Translation adjustment		(211)
Settlement/expiration of statutes of limitations	(2,196)	(1,417)
Liability for uncertain tax positions	$ 28,516	$ 29,061

Note 9 - Income Taxes - Provisi

Note 9 - Income Taxes - Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Federal, current	$ (1,555)	$ (215)
State, current	168	141
Foreign, current	2,472	3,687
Current	1,085	3,613
Federal, deferred	(1,412)	(2,222)
State, deferred	(151)	(135)
Foreign, deferred	(181)	185
Deferred	(1,744)	(2,172)
Income Tax Expense (Benefit), Total	$ (659)	$ 1,441

Note 9 - Income Taxes - Reconci

Note 9 - Income Taxes - Reconciliation of Taxes on Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Tax provision computed at the federal statutory rate, amount	$ 2,549	$ (1,534)
Tax provision computed at the federal statutory rate, percent	21.00%	21.00%
Different tax rates applicable to foreign operations, amount	$ 311	$ 2,978
Different tax rates applicable to foreign operations, percent	3.00%	(41.00%)
(Reversal of) increase in liability for uncertain tax positions - net	$ (1,432)	$ 320
Increase in (reversal of) liability for uncertain tax positions - net, percent	(12.00%)	(4.00%)
Impact of U.S. Tax Reform, amount	$ (1,129)	$ 0
Impact of U.S. Tax Reform, percent	(9.00%)	0.00%
Research and experimentation and foreign tax credits	$ (245)	$ (907)
Research and experimentation and foreign tax credits	(2.00%)	12.00%
State taxes, net of federal benefit, amount	$ 4	$ (54)
State taxes, net of federal benefit, percent	0.00%	1.00%
SERP/COLI and restricted stock income	$ (234)	$ (547)
SERP/COLI and restricted stock income, percent	(2.00%)	7.00%
Impairment of goodwill	$ 0	$ 1,522
Impairment of goodwill, percent	0.00%	(21.00%)
Other, net	$ (483)	$ (337)
Other, net, percent	(4.00%)	5.00%
Income Tax Expense (Benefit), Total	$ (659)	$ 1,441
Tax (benefit) provision computed at the Company's effective tax rate	(5.00%)	(20.00%)

Note 9 - Income Taxes - Compone

Note 9 - Income Taxes - Components of Deferred Income Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
State tax credits	$ 757	$ 1,046
Unfunded pension liability	1,840	1,102
Reserves and accruals	3,181	2,721
Federal, state and foreign net operating loss and credit carryforwards	7,744	8,042
Depreciation	604	686
Amortization	142	698
Lease accounting	3,217	3,961
Other accruals	5,452	5,079
Total deferred tax assets	22,937	23,335
Depreciation	1,992	1,901
Amortization	6,541	6,973
Lease accounting	3,110	3,871
Other accruals	330	370
Total deferred tax liabilities	11,973	13,115
Valuation allowance	6,289	8,216
Net deferred tax assets	$ 4,675	$ 2,004

Note 10 - Debt (Details Textual

Note 10 - Debt (Details Textual) - USD ($) $ in Thousands	Feb. 18, 2020	Dec. 11, 2017	Jun. 19, 2014	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2020	Dec. 31, 2019
Long-term Debt, Total						$ 116,835
Amortization of Debt Issuance Costs						654	$ 466
Repayments of Long-term Debt, Total						8,179	2,974
Credit and Security Agreement with KeyBank [Member]
Debt Issuance Costs, Net, Total			$ 5,800			$ 1,300	$ 1,300
Line of Credit Facility, Interest Rate at Period End						2.19%	3.31%
Effective LIBOR Rate						0.19%	1.81%
Interest Expense, Debt, Total						$ 4,700	$ 5,400
Debt Instrument, Term (Year)		5 years	5 years
Payments of Debt Issuance Costs		$ 1,800		$ 700
Amortization of Debt Issuance Costs				$ 500	$ 1,000
Line of Credit Facility, Percentage of Capital Stock of Foreign Subsidiaries Collateralized Security		65.00%
LIBOR Additional Rate		1.00%
Credit and Security Agreement with KeyBank [Member] | Term Loan [Member]
Repayments of Long-term Debt, Total	$ 8,200
Credit and Security Agreement with KeyBank [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate		0.50%				2.00%	1.50%
Credit and Security Agreement with KeyBank [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate		1.375%
Credit and Security Agreement with KeyBank [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate		2.75%
Credit and Security Agreement with KeyBank [Member] | LIBOR With Maturity of One Month [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate		0.375%
Credit and Security Agreement with KeyBank [Member] | LIBOR With Maturity of One Month [Member] | Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate		1.75%
Credit and Security Agreement with KeyBank [Member] | Revolving Credit Facility [Member]
Long-term Line of Credit, Total						$ 12,000	$ 32,000
Line of Credit Facility, Remaining Borrowing Capacity						63,000	43,000
Line of Credit Facility, Maximum Borrowing Capacity		$ 75,000	$ 50,000
Credit and Security Agreement with KeyBank [Member] | Term Loan [Member]
Long-term Debt, Total						$ 104,800	$ 113,000
Debt Instrument, Face Amount		$ 125,000	145,000
Credit and Security Agreement with KeyBank [Member] | Delayed Draw Term Loan ("DDTL") [Member]
Debt Instrument, Face Amount			$ 70,000

Note 10 - Debt - Scheduled Prin

Note 10 - Debt - Scheduled Principal Payments (Details) $ in Thousands	Dec. 31, 2020USD ($)
2021	$ 5,948
2022	110,887
Total long-term debt	116,835
Less: Current maturities of long-term debt	(5,948)
Noncurrent portion of long-term debt	$ 110,887

Note 11 - Accrued Expenses - Ac

Note 11 - Accrued Expenses - Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Sales commissions	$ 2,574	$ 2,542
Subcontracting labor	758	990
Salaries, bonuses and related benefits	17,165	14,715
Warranty accrual	1,010	1,576
Other	6,969	7,095
Accrued Liabilities, Current, Total	$ 28,476	$ 26,918

Note 12 - Segments (Details Tex

Note 12 - Segments (Details Textual) $ in Thousands	Oct. 01, 2019	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Number of Industry in which Entity Operates		1
Number of Operating Segments	3	3
Number of Reportable Segments		3
Revenue from Contract with Customer, Excluding Assessed Tax, Total		$ 465,771	$ 492,412
Asia [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total		$ 129,303	$ 154,746
Assets, Total [Member] | Geographic Concentration Risk [Member] | Asia [Member]
Concentration Risk, Percentage		32.60%
Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Concentration Risk, Percentage		11.90%	10.20%
Number of Customers		1	1
Revenue from Contract with Customer, Excluding Assessed Tax, Total		$ 55,200	$ 50,200

Note 12 - Segments - Segments (

Note 12 - Segments - Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net sales	$ 465,771	$ 492,412
Gross Profit	$ 119,730	$ 109,973
Gross Profit %	25.70%	22.30%
Total Assets	$ 453,866	$ 468,917
Capital Expenditures	5,476	9,891
Depreciation and amortization	16,423	16,471
Connectivity Solutions [Member]
Net sales	150,731	172,348
Gross Profit	$ 42,200	$ 44,417
Gross Profit %	28.00%	25.80%
Total Assets	$ 137,333	$ 145,344
Capital Expenditures	1,955	2,934
Depreciation and amortization	5,700	6,021
Power Solutions and Protection Segment [Member]
Net sales	181,488	163,528
Gross Profit	$ 45,587	$ 32,846
Gross Profit %	25.10%	20.10%
Total Assets	$ 180,939	$ 168,422
Capital Expenditures	2,458	4,570
Depreciation and amortization	8,611	7,858
Magnetic Solutions Segment [Member]
Net sales	133,552	156,536
Gross Profit	$ 33,072	$ 34,350
Gross Profit %	24.80%	21.90%
Total Assets	$ 92,538	$ 89,463
Capital Expenditures	1,063	2,387
Depreciation and amortization	2,112	2,592
Corporate Segment [Member]
Net sales	0	0
Gross Profit	(1,129)	(1,640)
Total Assets	43,056	65,688
Capital Expenditures	0
Depreciation and amortization

Note 12 - Segments - Net Sales

Note 12 - Segments - Net Sales to External Customers by Geographic Area and by Major Product Line (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net sales	$ 465,771	$ 492,412
Connectivity Solutions [Member]
Net sales	150,731	172,348
Magnetic Solutions [Member]
Net sales	133,552	156,536
Power Solutions and Protection [Member]
Net sales	181,488	163,528
UNITED STATES
Net sales	265,676	256,044
MACAU
Net sales	129,303	154,745
UNITED KINGDOM
Net sales	22,017	24,877
SLOVAKIA
Net sales	17,609	22,705
GERMANY
Net sales	13,582	14,855
SWITZERLAND
Net sales	8,612	10,654
All Other Foreign Countries [Member]
Net sales	$ 8,972	$ 8,532

Note 12 - Segments - Long-lived

Note 12 - Segments - Long-lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Long-lived assets	$ 63,923	$ 68,863
UNITED STATES
Long-lived assets	26,748	27,377
CHINA
Long-lived assets	28,711	30,245
SLOVAKIA
Long-lived assets	5,514	5,726
SWITZERLAND
Long-lived assets	87	2,339
UNITED KINGDOM
Long-lived assets	1,715	2,053
All Other Foreign Countries [Member]
Long-lived assets	$ 1,148	$ 1,123

Note 13 - Retirement Fund and_3

Note 13 - Retirement Fund and Profit Sharing Plan (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan, Percentage of Average Base Compensation Five Consecutive Years, Normal Retirement	40.00%
Defined Benefit Plan, Number of Monthly Payments	120
Percentage of Participant's Annual Base Salary Received by Beneficiary, One Year From Date of Death	100.00%
Percentage of Participant's Annual Base Salary Received by Beneficiary, Following Four Years From Date of Death	50.00%
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	$ 1,579	$ 1,507
Defined Benefit Plan, Accumulated Benefit Obligation	22,400	18,500
Investments, Fair Value Disclosure, Total	15,400	14,700
Defined Benefit Plan, Expected Amortization, Next Fiscal Year, Total	500
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	500
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	$ 0	0	$ 0
Bel Fuse Inc. Employees' Savings Plan [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent Of Match, First 1% Employee Contribution	100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match, Next 5% Employee Contribution	50.00%
Defined Contribution Plan, Cost	$ 1,100	1,100
Bel Fuse Inc. Employees' Savings Plan [Member] | Common Class A [Member]
Shares Held in Plan (in shares)	257,030
Bel Fuse Inc. Employees' Savings Plan [Member] | Common Class B [Member]
Shares Held in Plan (in shares)	109,435
Retirement Fund Covering Hong Kong-based Employees [Member]
Defined Contribution Plan, Cost	$ 300	$ 300
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	5.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	7.00%
Retirement Fund Covering Hong Kong-based Employees [Member] | Minimum [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	5.00%
Retirement Fund Covering Hong Kong-based Employees [Member] | Common Class A [Member]
Shares Held in Plan (in shares)	3,323
Retirement Fund Covering Hong Kong-based Employees [Member] | Common Class B [Member]
Shares Held in Plan (in shares)	17,342

Note 13 - Retirement Fund and_4

Note 13 - Retirement Fund and Profit Sharing Plan - Components of SERP Expense (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Service cost	$ 600	$ 576
Interest cost	636	739
Net amortization	343	192
Net periodic benefit cost	$ 1,579	$ 1,507

Note 13 - Retirement Fund and_5

Note 13 - Retirement Fund and Profit Sharing Plan - Changes in Plan Assets and Benefit Obligation (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair value of plan assets	$ 0	$ 0
Company contributions	446	430
Benefits paid	(446)	(430)
Fair value of plan assets	0	0
Benefit obligation	21,541	18,676
Service cost	600	576
Interest cost	636	739
Benefits paid	(446)	(430)
Plan amendments	0	0
Actuarial losses	1,977	1,980
Benefit obligation	24,308	21,541
Underfunded status, December 31	$ (24,308)	$ (21,541)

Note 13 - Retirement Fund and_6

Note 13 - Retirement Fund and Profit Sharing Plan - Benefit Payments Expected to be Paid (Details) - Supplemental Employee Retirement Plan [Member] $ in Thousands	Dec. 31, 2020USD ($)
2021	$ 675
2022	919
2023	921
2024	959
2025	999
2026 - 2030	$ 5,642

Note 13 - Retirement Fund and_7

Note 13 - Retirement Fund and Profit Sharing Plan - Amounts Recognized in Accumulated Other Comprehensive Loss (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Prior service cost	$ 586	$ 738
Net loss	1,773	1,965
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax, Total	$ 2,359	$ 2,703

Note 13 - Retirement Fund and_8

Note 13 - 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, 2020	Dec. 31, 2019
Discount rate, net periodic benefit cost	3.00%	4.00%
Rate of compensation increase, net periodic benefit cost	2.50%	2.50%
Discount rate, benefit obligation	2.25%	3.00%
Rate of compensation increase, benefit obligation	2.50%	2.50%

Note 14 - Share-based Compens_3

Note 14 - Share-based Compensation (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Restricted Stock [Member]
Share-based Payment Arrangement, Expense	$ 2.3	$ 2.9
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount	$ 5.1
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	25.00%
Common Class B [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares)	113,000	70,000
The 2020 Equity Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)	1,000,000
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
The 2011 Equity Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)	0
The 2011 Equity Compensation Plan [Member] | Common Class B [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)	1,400,000

Note 14 - Share-based Compens_4

Note 14 - Share-based Compensation - Summary of Restricted Stock Activity (Details) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Outstanding, shares (in shares)	445,300
Outstanding, weighted average award price (in dollars per share)	$ 23.96
Outstanding, weighted average remaining contractual term (Year)	3 years	3 years 4 months 24 days
Granted, shares (in shares)	113,000
Granted, weighted average award price (in dollars per share)	$ 8.24
Vested, shares (in shares)	(120,850)
Vested, weighted average award price (in dollars per share)	$ 24.10
Forfeited, shares (in shares)	(32,000)
Forfeited, weighted average award price (in dollars per share)	$ 20.52
Outstanding, shares (in shares)	405,450	445,300
Outstanding, weighted average award price (in dollars per share)	$ 19.77	$ 23.96

Note 15 - Common Stock (Details

Note 15 - Common Stock (Details Textual) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Percentage of Common Stock A Held By One Shareholder Without Any Common Stock B	21.60%
Dividends, Common Stock, Total	$ 3.4	$ 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	0.06
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	$ 0.07

Note 16 - Leases (Details Textu

Note 16 - Leases (Details Textual)	12 Months Ended
	Dec. 31, 2020
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 16 - Leases - Components o

Note 16 - Leases - Components of Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)
Amortization of ROU assets - finance leases	$ 205
Interest on lease liabilities - finance leases	65
Operating lease cost (cost resulting from lease payments)	8,113
Short-term lease cost	189
Variable lease cost (cost excluded from lease payments)	270
Sublease income	0
Total lease cost	$ 8,842
Operating leases (in years) (Year)	2 years 8 months 12 days
Finance leases (in years) (Year)	4 years 7 months 6 days
Operating leases	6.00%
Finance leases	6.30%

Note 16 - Leases - Supplemental

Note 16 - Leases - Supplemental Cash Flow Information Related to Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)
Operating cash flows from operating leases	$ 8,022
Operating cash flows from finance leases	65
Finance cash flows from finance leases	185
Operating leases	3,384
Finance leases	$ 451

Note 16 - Leases - Supplement_2

Note 16 - Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Operating Lease, Right-of-Use Asset	$ 14,217	$ 18,504
Operating lease liability, current	6,591	7,377
Operating lease liability, long-term	8,064	11,751
Total operating lease liabilities	14,655
Property, plant and equipment, gross	146,749	168,377
Accumulated depreciation	(112,248)	(126,434)
Property, plant and equipment, net	34,501	$ 41,943
Other current liabilities	198
Other long-term liabilities	790
Total finance lease liabilities	988
Assets under Finance Lease [Member]
Property, plant and equipment, gross	966
Accumulated depreciation	(391)
Property, plant and equipment, net	$ 575

Note 16 - Leases - Maturities o

Note 16 - Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Dec. 31, 2020USD ($)
2021, operating leases	$ 7,575
2021, finance leases	280
2022, operating leases	4,655
2022, finance leases	264
2023, operating leases	2,421
2023, finance leases	264
2024, operating leases	883
2024, finance leases	248
2025, operating leases	260
2025, finance leases	78
Operating leases, Thereafter	315
Finance leases, Thereafter	80
Operating leases, Total undiscounted cash flows	16,109
Finance leases, Total undiscounted cash flows	1,214
Operating leases, Less imputed interest	(1,454)
Finance leases, Less imputed interest	(226)
Operating Lease, Liability, Total	14,655
Finance leases, Present value of lease liabilities	988
Other Liabilities [Member]
Operating Lease, Liability, Total	$ 14,655

Note 17 - Commitments and Con_2

Note 17 - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Purchase Commitment, Remaining Minimum Amount Committed	$ 42.5	$ 42.5
Arezzo Revenue Agency [Member]
Loss Contingency, Estimate of Possible Loss	12
Capital Addition Purchase Commitments [Member]
Long-term Purchase Commitment, Amount	$ 2.1	$ 2.8

Note 18 - Accumulated Other C_3

Note 18 - Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Foreign currency translation adjustment	$ (13,142)	$ (20,032)
Unrealized holding gains on available-for-sale securities, net of taxes of $0 at December 31, 2020 and $0 at December 31, 2020	19	12
Unfunded SERP liability, net of taxes of ($1,377) at December 31, 2020 and ($639) at December 31, 2020	(4,940)	(4,045)
Accumulated other comprehensive loss	$ (18,063)	$ (24,065)

Note 18 - Accumulated Other C_4

Note 18 - Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Details) (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Unrealized loss on marketable securities arising during the period, tax	$ 0	$ 0
Change in unfunded SERP liability, tax	$ (1,377)	$ (639)

Note 18 - Accumulated Other C_5

Note 18 - Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Balance		$ 168,051	$ 176,470
Other comprehensive income:		6,002	1,236
Balance		185,799	168,051
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance		(20,032)	(22,635)
Other comprehensive income (loss) before reclassifications		6,890	2,603
Amounts reclassified from accumulated other comprehensive income (loss)		0	0
Effect of adoption of ASU 2018-02 (Topic 220)			0
Other comprehensive income:		6,890	2,603
Balance		(13,142)	(20,032)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Balance		12	12
Other comprehensive income (loss) before reclassifications		7	0
Amounts reclassified from accumulated other comprehensive income (loss)		0	0
Effect of adoption of ASU 2018-02 (Topic 220)			0
Other comprehensive income:		7	0
Balance		19	12
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance		(4,045)	(2,215)
Other comprehensive income (loss) before reclassifications		(933)	(1,492)
Amounts reclassified from accumulated other comprehensive income (loss)	[1]	38	125
Effect of adoption of ASU 2018-02 (Topic 220)			(463)
Other comprehensive income:		(895)	(1,830)
Balance		(4,940)	(4,045)
AOCI Attributable to Parent [Member]
Balance		(24,065)	(24,838)
Other comprehensive income (loss) before reclassifications		5,964	1,111
Amounts reclassified from accumulated other comprehensive income (loss)		38	125
Effect of adoption of ASU 2018-02 (Topic 220)			(463)
Other comprehensive income:		6,002	773
Balance		$ (18,063)	$ (24,065)
[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) income, net on the accompanying consolidated statement of operations.

Note 19 - Subsequent Events (De

Note 19 - Subsequent Events (Details Textual) - USD ($) $ in Thousands	Jan. 15, 2021	Jan. 08, 2021	Dec. 31, 2020	Dec. 31, 2019
Proceeds from Sale of Property, Plant, and Equipment, Total			$ 3,961	$ 5,807
Property, Plant and Equipment, Net, Ending Balance			$ 34,501	$ 41,943
Subsequent Event [Member] | A Property in Hong Kong [Member]
Proceeds from Sale of Property, Plant, and Equipment, Total	$ 6,700
Subsequent Event [Member] | A Property in Hong Kong [Member] | Discontinued Operations, Disposed of by Sale [Member]
Property, Plant and Equipment, Net, Ending Balance	$ 500
rms Connectors, Inc. [Member] | Subsequent Event [Member]
Payments to Acquire Businesses, Gross		$ 8,500