Monolithic Power Systems (MPWR) 10-Q 2 Aug 24 2024 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2024	Jul. 26, 2024
Document Information [Line Items]
Entity Central Index Key	0001280452
Entity Registrant Name	MONOLITHIC POWER SYSTEMS INC
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2024
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2024
Document Transition Report	false
Entity File Number	000-51026
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0466789
Entity Address, Address Line One	5808 Lake Washington Blvd. NE
Entity Address, City or Town	Kirkland
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98033
City Area Code	425
Local Phone Number	296-9956
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	MPWR
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		48,752,000

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 550,475	$ 527,843
Short-term investments	756,770	580,633
Accounts receivable, net	157,890	179,858
Inventories	426,751	383,702
Other current assets	105,547	147,463
Total current assets	1,997,433	1,819,499
Property and equipment, net	400,534	368,952
Acquisition-related intangible assets, net	10,512	0
Goodwill	26,080	6,571
Deferred tax assets, net	29,707	28,054
Other Assets, Noncurrent	183,866	211,277
Total assets	2,648,132	2,434,353
Liabilities, Current [Abstract]
Accounts payable	99,894	62,958
Accrued compensation and related benefits	63,917	56,286
Other accrued liabilities	131,348	115,791
Total current liabilities	295,159	235,035
Income tax liabilities	60,440	60,724
Other long-term liabilities	96,675	88,655
Total liabilities	452,274	384,414
Commitments and contingencies
Stockholders’ equity:
Common stock and additional paid-in capital: $0.001 par value; shares authorized: 150,000; shares issued and outstanding: 48,698 and 48,028, respectively	1,224,144	1,129,937
Retained earnings	1,016,208	947,064
Accumulated other comprehensive loss	(44,494)	(27,062)
Total stockholders’ equity	2,195,858	2,049,939
Total liabilities and stockholders’ equity	$ 2,648,132	$ 2,434,353

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares shares in Thousands	Jun. 30, 2024	Dec. 31, 2023
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	150,000	150,000
Common stock, shares issued (in shares)	48,698	48,028
Common stock, shares outstanding (in shares)	48,698	48,028

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue	$ 507,431	$ 441,128	$ 965,316	$ 892,193
Cost of revenue	226,853	193,453	432,297	385,738
Gross profit	280,578	247,675	533,019	506,455
Operating expenses:
Research and development	77,945	63,688	153,935	127,397
Selling, general and administrative	86,097	71,662	167,061	142,457
Total operating expenses	164,042	135,350	320,996	269,854
Operating income	116,536	112,325	212,023	236,601
Other income, net	7,512	6,543	17,052	11,840
Income before income taxes	124,048	118,868	229,075	248,441
Income tax expense	23,682	19,364	36,168	39,135
Net income	$ 100,366	$ 99,504	$ 192,907	$ 209,306
Net income per share
Basic (in dollars per share)	$ 2.06	$ 2.1	$ 3.96	$ 4.42
Diluted (in dollars per share)	$ 2.05	$ 2.04	$ 3.94	$ 4.3
Weighted-average shares outstanding:
Basic (in shares)	48,687	47,489	48,660	47,361
Diluted (in shares)	48,945	48,756	48,935	48,705

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net income	$ 100,366	$ 99,504	$ 192,907	$ 209,306
Other comprehensive loss, net of tax:
Foreign currency translation adjustments	(4,313)	(26,180)	(18,135)	(23,261)
Change in unrealized gains and losses on available-for-sale securities, net of tax of $50, $158, $(198) and $469, respectively	368	728	703	2,941
Other comprehensive loss, net of tax:	(3,945)	(25,452)	(17,432)	(20,320)
Comprehensive income	$ 96,421	$ 74,052	$ 175,475	$ 188,986

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Change in unrealized gain (loss) on available-for-sale securities, tax	$ 50	$ 158	$ (198)	$ 469

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock Including Additional Paid in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2022	47,107,000
Balance at Dec. 31, 2022	$ 975,276	$ 716,403	$ (23,077)	$ 1,668,602
Net income	0	209,306	0	209,306
Other comprehensive loss	0	0	(20,320)	(20,320)
Dividends and dividend equivalents declared	$ 0	(98,353)	0	(98,353)
Common stock issued under the employee equity incentive plan (in shares)	495,000
Common stock issued under the employee equity incentive plan	$ 1,114	0	0	1,114
Stock-based compensation expense	75,003	0	0	75,003
Other comprehensive loss	$ 0	0	(20,320)	(20,320)
Common stock issued under the employee stock purchase plan (in shares)	9,000
Common stock issued under the employee stock purchase plan	$ 3,737	0	0	3,737
Balance (in shares) at Jun. 30, 2023	47,611,000
Balance at Jun. 30, 2023	$ 1,055,130	827,356	(43,397)	1,839,089
Balance (in shares) at Mar. 31, 2023	47,411,000
Balance at Mar. 31, 2023	$ 1,017,131	777,075	(17,945)	1,776,261
Net income	0	99,504	0	99,504
Other comprehensive loss	0	0	(25,452)	(25,452)
Dividends and dividend equivalents declared	$ 0	(49,223)	0	(49,223)
Common stock issued under the employee equity incentive plan (in shares)	200,000
Common stock issued under the employee equity incentive plan	$ 4	0	0	4
Stock-based compensation expense	37,995	0	0	37,995
Other comprehensive loss	$ 0	0	(25,452)	(25,452)
Balance (in shares) at Jun. 30, 2023	47,611,000
Balance at Jun. 30, 2023	$ 1,055,130	827,356	(43,397)	$ 1,839,089
Balance (in shares) at Dec. 31, 2023	48,028,000			48,028,000
Balance at Dec. 31, 2023	$ 1,129,937	947,064	(27,062)	$ 2,049,939
Net income	0	192,907	0	192,907
Other comprehensive loss	0	0	(17,432)	(17,432)
Dividends and dividend equivalents declared	$ 0	(123,763)	0	(123,763)
Common stock issued under the employee equity incentive plan (in shares)	671,000
Common stock issued under the employee equity incentive plan	$ 0	0	0	$ 0
Repurchases of common stock (in shares)	(12,000)			(12,400)
Repurchases of common stock	$ (8,626)	0	0	$ (8,626)
Stock-based compensation expense	98,227	0	0	98,227
Other comprehensive loss	$ 0	0	(17,432)	(17,432)
Common stock issued under the employee stock purchase plan (in shares)	11,000
Common stock issued under the employee stock purchase plan	$ 4,606	0	0	$ 4,606
Balance (in shares) at Jun. 30, 2024	48,698,000			48,698,000
Balance at Jun. 30, 2024	$ 1,224,144	1,016,208	(44,494)	$ 2,195,858
Balance (in shares) at Mar. 31, 2024	48,667,000
Balance at Mar. 31, 2024	$ 1,176,382	977,724	(40,549)	2,113,557
Net income	0	100,366	0	100,366
Other comprehensive loss	0	0	(3,945)	(3,945)
Dividends and dividend equivalents declared	$ 0	(61,882)	0	(61,882)
Common stock issued under the employee equity incentive plan (in shares)	37,000
Common stock issued under the employee equity incentive plan	$ 0	0	0	$ 0
Repurchases of common stock (in shares)	(6,000)			(6,300)
Repurchases of common stock	$ (4,550)	0	0	$ (4,550)
Stock-based compensation expense	52,312	0	0	52,312
Other comprehensive loss	$ 0	0	(3,945)	$ (3,945)
Balance (in shares) at Jun. 30, 2024	48,698,000			48,698,000
Balance at Jun. 30, 2024	$ 1,224,144	$ 1,016,208	$ (44,494)	$ 2,195,858

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Dividends and dividend equivalents declared per share (in dollars per share)	$ 1.25	$ 1	$ 2.5	$ 2

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net income	$ 192,907	$ 209,306
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	16,942	19,940
Amortization of premium (discount) on available-for-sale securities	(10,040)	56
Gain on deferred compensation plan investments	(5,285)	(5,022)
Gain on sale of equity investments	0	(1,424)
Deferred taxes, net	(5,821)	(984)
Stock-based compensation expense	98,232	75,001
Other	77	0
Changes in operating assets and liabilities:
Accounts receivable	21,951	13,544
Inventories	(42,350)	19,847
Other assets	60,590	(4,881)
Accounts payable	30,725	12,653
Accrued compensation and related benefits	8,353	(20,613)
Income tax liabilities	7,459	(14,802)
Other accrued liabilities	15,286	6,371
Net cash provided by operating activities	389,026	308,992
Cash flows from investing activities:
Purchases of property and equipment	(47,498)	(16,681)
Cash paid for an assumed lease	(18,175)	0
Purchases of investments	(589,615)	(211,407)
Maturities and sales of investments	420,514	232,206
Cash paid for acquisition, net of cash acquired	(33,283)	0
Contributions to deferred compensation plan, net	(1,309)	(3,855)
Net cash provided by (used in) investing activities	(269,366)	263
Cash flows from financing activities:
Property and equipment purchased on extended payment terms	(2,010)	(1,192)
Proceeds from common stock issued under the employee equity incentive plan	0	1,114
Proceeds from common stock issued under the employee stock purchase plan	4,606	3,737
Repurchases of common stock	(8,626)	0
Dividends and dividend equivalents paid	(117,608)	(85,863)
Net cash used in financing activities	(123,638)	(82,204)
Effect of change in exchange rates	(6,603)	(8,696)
Net increase (decrease) in cash, cash equivalents and restricted cash	(10,581)	218,355
Cash, cash equivalents and restricted cash, beginning of period	561,181	288,729
Cash, cash equivalents and restricted cash, end of period	550,600	507,084
Supplemental disclosures for cash flow information:
Cash paid for income taxes, net	34,064	58,216
Non-cash investing and financing activities:
Liability accrued for property and equipment purchases	7,488	2,586
Liability accrued for dividends and dividend equivalents	$ 62,949	$ 51,037

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Significant Accounting Policies [Text Block]	1. The accompanying unaudited condensed consolidated financial statements have been prepared by Monolithic Power Systems, Inc. (the “Company” or “MPS”) in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”). Certain information and disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted in accordance with these accounting principles, rules and regulations. The information in this report should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the Annual Report on Form 10 December 31, 2023 February 29, 2024. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments) necessary to present fairly the Company’s financial position, results of operations and cash flows for the interim periods presented. The financial statements contained in this Quarterly Report on Form 10 not may December 31, 2024 Summary of Significant Accounting Policies no three six June 30, 2024 10 December 31, 2023, Goodwill and Acquisition-Related Intangible Assets not Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenue and expenses during the reporting period. Significant estimates and assumptions used in these condensed consolidated financial statements primarily include those related to revenue recognition, inventory valuation, valuation of share-based awards, contingencies and income tax valuation allowances. Actual results could differ from these estimates and assumptions, and any such differences may New Accounting Pronouncements Not June 30, 2024 In November 2023, 2023 07, 280 January 1, 2024 January 1, 2025, In December 2023, 2023 09, 740 January 1, 2025. not

Note 2 - Revenue Recognition

Note 2 - Revenue Recognition	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	2. REVENUE RECOGNITION Revenue from Product Sales The Company generates revenue primarily from product sales, which include assembled and tested integrated circuits (“ICs”), power modules as well as dies in wafer form. These product sales accounted for 99% of the Company’s total revenue for each of the three six June 30, 2024 2023 third 8 The Company sells its products primarily through third three June 30, 2024 2023 six June 30, 2024 2023 not The Company recognizes revenue when it satisfies a performance obligation by transferring control of the promised goods or services to its customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. The Company excludes taxes assessed by government authorities, such as sales taxes, from revenue. Product sales consist of a single performance obligation that the Company satisfies at a point in time. The Company recognizes product revenue from distributors and direct end customers when the following events have occurred: (a) the Company has transferred physical possession of the products, (b) the Company has a present right to payment, (c) the customer has legal title to the products, and (d) the customer bears significant risks and rewards of ownership of the products. In accordance with the shipping terms specified in the contracts, these criteria are generally met when the products are shipped from the Company’s facilities (such as the “Ex Works” shipping term) or delivered to the customers’ locations (such as the “Delivered Duty Paid” shipping term). Under certain consignment agreements, the Company recognizes revenue when the customers consume the products from the consigned inventory locations, at which time control transfers to the customers and the Company issues invoices. Variable Consideration The Company accounts for price adjustments and stock rotation rights as variable consideration that reduces the transaction price and recognizes that reduction in the same period the associated revenue is recognized. Certain U.S.-based distributors have price adjustment rights when they sell the Company’s products to their end customers at a price that is lower than the distribution price invoiced by the Company. When the Company receives claims from the distributors that products have been sold to the end customers at the lower price, the Company issues the distributors credit memos for the price adjustments. The Company estimates the price adjustments using the expected value method based on an analysis of historical claims, at both the distributor and product level, as well as an assessment of any known trends of product sales mix. Other U.S. distributors and non-U.S. distributors do not Certain distributors have limited stock rotation rights that permit the return of a small percentage of the previous six Contract Balances Accounts Receivable: The Company records a receivable when it has an unconditional right to receive consideration after the performance obligations are satisfied. The Company’s accounts receivables are short-term, with standard payment terms generally ranging from 30 90 not may not Contract Liabilities: For customers without credit terms, the Company requires cash payments two June 30, 2024 December 31, 2023 , six June 30, 2024 Practical Expedients The Company has elected the practical expedient to expense sales commissions as incurred because the amortization period would have been one The Company’s standard payment terms generally require customers to pay 30 to 90 days after the Company satisfies the performance obligations. For those customers who are required to pay in advance, the Company satisfies the performance obligations generally within a quarter. For these reasons, the Company has elected not The Company’s unsatisfied performance obligations primarily include products held in consignment arrangements and customer purchase orders for products that the Company has not one not

Note 3 - Stock-based Compensati

Note 3 - Stock-based Compensation	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Share-Based Payment Arrangement [Text Block]	3. 2014 In April 2013, 2014 “2014 June 2013. October 2014, 2014 2014 November 13, 2014, April 2020, 2014 2014 June 2020. 2014 June 11, 2020, 2014 June 11, 2030. June 30, 2024 2014 Stock-Based Compensation Expense The Company recognized stock-based compensation expenses as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Cost of revenue $ 1,611 $ 1,150 $ 3,009 $ 2,297 Research and development 11,682 9,313 22,129 17,927 Selling, general and administrative (“SG&A”) 39,013 27,529 73,094 54,777 Total stock-based compensation expense $ 52,306 $ 37,992 $ 98,232 $ 75,001 Tax benefit related to stock-based compensation (1) $ 798 $ 663 $ 1,506 $ 1,086 ( 1 Amount reflects the tax benefit related to stock-based compensation recorded for equity awards that are expected to generate tax deductions when they vest in future periods. Equity awards granted to the Company’s executive officers are subject to the tax deduction limitations set by Section 162 Restricted Stock Units ( RSUs ) The Company’s RSUs include time-based RSUs, RSUs with performance conditions (“PSUs”), RSUs with market conditions (“MSUs”), and RSUs with both market and performance conditions (“MPSUs”). Vesting of awards with performance conditions or market conditions is subject to the achievement of pre-determined performance or market goals and the approval of such achievement by the Compensation Committee of the Board of Directors (the “Compensation Committee”). All awards include service conditions which require continued employment with or services to the Company. A summary of RSU activity is presented in the table below (in thousands, except per-share amounts): Time-Based RSUs PSUs and MPSUs MSUs Total Weighted- Weighted- Weighted- Weighted- Average Average Average Average Grant Date Grant Date Grant Date Grant Date Number of Fair Value Number of Fair Value Number of Fair Value Number of Fair Value Shares Per Share Shares Per Share Shares Per Share Shares Per Share Outstanding at January 1, 2024 102 $ 411.11 482 $ 397.77 1,502 $ 152.89 2,086 $ 222.04 Granted 30 $ 635.67 344 (1) $ 593.33 - $ - 374 $ 596.68 Vested (31 ) $ 363.82 (77 ) $ 307.93 (563 ) $ 68.48 (671 ) $ 109.62 Forfeited (3 ) $ 465.22 (1 ) $ 396.40 (1 ) $ 270.15 (5 ) $ 412.40 Outstanding at June 30, 2024 98 $ 493.16 748 $ 496.84 938 $ 203.33 1,784 $ 342.19 ( 1 Amount reflects the number of awards that may The intrinsic value related to vested RSUs was $25.5 million and $98.1 million for the three June 30, 2024 2023 six June 30, 2024 2023 June 30, 2024 June 30, 2024 two Time-Based RSUs: For the six June 30, 2024 four one 2024 In February 2024, three “2024 first 2024 three 2024 2026 three second 2024 2026 25% 1 2 2022 third 2024 one third 2026 third 2024 2026 48V 200% 2023 first 2024 December 31, 2026, 2024 second third December 31, 2026 2024 In February 2024, 2025 two 2024 2025 two “2024 2024 2024 first 2026 2024 two 2024 The 2024 2024 $30 $30 2024 2024 three no not 2004 2004 ) On August 16, 2023, 2004 2004 August 16, 2038. No shares were issued under the 2004 three June 30, 2024 2023. six June 30, 2024 2023 2004 June 30, 2024 2004 The intrinsic value of the shares issued was $3.5 million and $0.7 million for the six June 30, 2024 2023 June 30, 2024 third 2024. Six Months Ended June 30, 2024 2023 Expected term (in years) 0.5 0.5 Expected volatility 42.4 % 55.8 % Risk-free interest rate 5.3 % 5.0 % Dividend yield 0.7 % 0.8 % Cash proceeds from the shares issued under the 2004 six June 30, 2024 2023

Note 4 - Acquisition

Note 4 - Acquisition	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Business Combination Disclosure [Text Block]	4. On January 3, 2024 ( Purchase Consideration The purchase consideration was $33.4 million in cash. Cash paid at the Acquisition Date included $3.8 million that is being held in an escrow account for a one In connection with the acquisition, the Company incurred $0.4 million in transaction costs that were expensed as incurred and included in selling, general and administrative expenses in the Condensed Consolidated Statements of Operations. Purchase Price Allocation The purchase price allocation for Axign is as follows (in thousands): Inventory $ 720 Other tangible assets acquired, net of liabilities assumed 1,487 Intangible assets: Developed technology 9,184 IPR&D 2,147 Total identifiable net assets acquired 13,538 Goodwill 19,860 Total net assets acquired $ 33,398 The intangible asset acquired with a finite life includes the core developed technology with an estimated remaining useful life of eight not The goodwill arising from the acquisition was primarily attributed to the assembled workforce and synergies that are anticipated to enable the Company to develop solutions with lower power consumption in the consumer and automotive markets using Axign’s digital feedback technology. The goodwill is not

Note 5 - Balance Sheet Componen

Note 5 - Balance Sheet Components	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Supplemental Balance Sheet Disclosures [Text Block]	5. Inventories Inventories consist of the following (in thousands): June 30, December 31, 2024 2023 Raw materials $ 93,435 $ 118,917 Work in process 164,116 112,750 Finished goods 169,200 152,035 Total $ 426,751 $ 383,702 Other Current Assets Other current assets consist of the following (in thousands): June 30, December 31, 2024 2023 Prepaid wafer purchases $ 60,000 $ - Prepaid expenses 27,570 28,964 RSU tax withholding proceeds receivable 71 20,141 Other receivables - 50,000 Restricted cash - 33,204 Other 17,906 15,154 Total $ 105,547 $ 147,463 The Company held $60 million in prepaid wafer purchases as of June 30, 2024 December 31, 2023 9 December 31, 2023 January 2024. 4 Other Long-Term Assets Other long-term assets consist of the following (in thousands): June 30, December 31, 2024 2023 Deferred compensation plan assets $ 84,975 $ 78,381 Prepaid wafer purchases 60,000 120,000 Operating lease right-of-use (“ROU”) and related assets 33,681 8,355 Other 5,210 4,541 Total $ 183,866 $ 211,277 Prepaid wafer purchases relate to a deposit made to a supplier under a long-term wafer supply agreement. See Note 9 June 30, 2024 Other Accrued Liabilities Other accrued liabilities consist of the following (in thousands): June 30, December 31, 2024 2023 Dividends and dividend equivalents $ 62,524 $ 57,697 Stock rotation and sales returns 21,716 18,843 Warranty 14,702 16,906 Customer prepayments 5,564 2,792 Accrued legal expenses 4,249 1,277 Income tax payable 9,641 8,063 Other 12,952 10,213 Total $ 131,348 $ 115,791 Other Long-Term Liabilities Other long-term liabilities consist of the following (in thousands): June 30, December 31, 2024 2023 Deferred compensation plan liabilities $ 80,115 $ 80,903 Operating lease liabilities 13,045 5,565 Dividend equivalents 3,515 2,187 Total $ 96,675 $ 88,655

Note 6 - Leases

Note 6 - Leases	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Leases Disclosure [Text Block]	6. Lessee The Company has operating leases primarily for administrative, sales and marketing offices, manufacturing operations and R&D facilities, employee housing units and certain equipment. These leases have remaining lease terms from less than one five not The following table summarizes the balances of operating lease ROU assets and liabilities (in thousands): June 30, December 31, Financial Statement Line Item 2024 2023 Operating lease ROU assets Other long-term assets $ 15,956 $ 8,355 Operating lease liabilities Other accrued liabilities $ 2,446 $ 2,303 Other long-term liabilities $ 13,045 $ 5,565 The following tables summarize certain information related to the leases (in thousands, except percentages and years): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Lease costs: Operating lease costs $ 1,014 $ 759 $ 1,911 $ 1,475 Other 648 554 1,198 1,092 Total lease costs $ 1,662 $ 1,313 $ 3,109 $ 2,567 Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 1,027 $ 774 $ 1,700 $ 1,638 ROU assets obtained in exchange for new operating lease liabilities $ 7,809 $ 290 $ 9,271 $ 4,835 June 30, December 31, 2024 2023 Weighted-average remaining lease term (in years) 12.1 4.7 Weighted-average discount rate 5.4 % 4.3 % As of June 30, 2024 2024 (remaining six months) $ 1,617 2025 2,997 2026 2,249 2027 2,012 2028 1,380 Thereafter 12,534 Total remaining lease payments 22,789 Less: imputed interest (7,298 ) Total lease liabilities $ 15,491 As of June 30, 2024 , not not Lessor The Company owns certain office buildings and leases a portion of these properties to third one five five For the three June 30, 2024 2023 six June 30, 2024 2023 June 30, 2024 2024 (remaining six months) $ 525 2025 578 2026 402 2027 373 2028 384 Thereafter 129 Total $ 2,391

Note 7 - Net Income Per Share

Note 7 - Net Income Per Share	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Earnings Per Share [Text Block]	7. Basic net income per share is computed by dividing net income by the weighted-average number of shares of common stock outstanding for the period. Diluted net income per share reflects the potential dilution that would occur if outstanding securities or other contracts to issue common stock were exercised or converted into shares of common stock, and calculated using the treasury stock method. Contingently issuable shares, including equity awards with performance conditions or market conditions, are considered outstanding shares of common stock and included in the basic net income per share as of the date that all necessary conditions to earn the awards have been satisfied. Prior to the end of the contingency period, the number of contingently issuable shares included in the diluted net income per share is based on the number of shares, if any, that would be issuable under the terms of the arrangement at the end of the reporting period. The Company’s RSUs contain forfeitable rights to receive cash dividend equivalents, which are accumulated and paid to the employees when the underlying RSUs vest. Dividend equivalents accumulated on the underlying RSUs are forfeited if the employees do not not not The following table sets forth the computation of basic and diluted net income per share (in thousands, except per-share amounts): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Numerator: Net income $ 100,366 $ 99,504 $ 192,907 $ 209,306 Denominator: Weighted-average outstanding shares — basic 48,687 47,489 48,660 47,361 Effect of dilutive securities 258 1,267 275 1,344 Weighted-average outstanding shares — diluted 48,945 48,756 48,935 48,705 Net income per share: Basic $ 2.06 $ 2.10 $ 3.96 $ 4.42 Diluted $ 2.05 $ 2.04 $ 3.94 $ 4.30 Anti-dilutive common stock equivalents were not Stock Repurchase Program October 2023, October 29, 2026. three six June 30, 2024 may not may 2022 1% December 31, 2022. not three six June 30, 2024

Note 8 - Segment, Significant C

Note 8 - Segment, Significant Customers and Geographic Information	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	8. The Company operates in one The Company sells its products primarily to third 10% Three Months Ended June 30, Six Months Ended June 30, Customer 2024 2023 2024 2023 Distributor A 38 % 22 % 40 % 21 % Distributor B 17 % 20 % 15 % 21 % Distributor C * 11 % * 10 % The Company’s agreements with these third may may not The following table summarizes those customers with accounts receivable equal to 10% June 30, December 31, Customer 2024 2023 Distributor A 41 % 42 % Distributor B 24 % 13 % Distributor C * 10 % * Represents less than 10% The following is a summary of revenue by geographic region (in thousands): Three Months Ended June 30, Six Months Ended June 30, Country or Region 2024 2023 2024 2023 China $ 282,514 $ 216,172 $ 545,554 $ 441,224 Taiwan 127,396 70,212 227,846 119,045 South Korea 39,513 40,669 75,050 86,349 Europe 19,105 36,348 36,847 79,451 United States 13,927 27,571 28,747 58,588 Southeast Asia 11,352 21,708 24,591 48,140 Japan 13,552 28,288 26,500 59,103 Other 72 160 181 293 Total $ 507,431 $ 441,128 $ 965,316 $ 892,193 In the second 2024, The following is a summary of revenue by product family (in thousands): Three Months Ended June 30, Six Months Ended June 30, Product Family 2024 2023 2024 2023 Direct Current (“DC”) to DC $ 501,302 $ 418,175 $ 947,367 $ 843,356 Lighting Control 6,129 22,953 17,949 48,837 Total $ 507,431 $ 441,128 $ 965,316 $ 892,193 The following is a summary of long-lived assets by geographic region (in thousands): June 30, December 31, Country 2024 2023 China $ 207,614 $ 184,685 United States 124,000 119,430 Taiwan 37,071 39,419 Other 31,849 25,418 Total $ 400,534 $ 368,952

Note 9 - Commitments and Contin

Note 9 - Commitments and Contingencies	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	9. Product Warranties The Company generally provides either a one two no not The changes in warranty reserves are as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Balance at beginning of period $ 12,873 $ 19,726 $ 16,906 $ 24,082 Warranties issued 2,225 580 2,325 942 Repairs, replacement and refund (116 ) (1,581 ) (4,130 ) (2,253 ) Changes in liability for pre-existing warranties (280 ) (1,071 ) (399 ) (5,117 ) Balance at end of period $ 14,702 $ 17,654 $ 14,702 $ 17,654 Changes in liability for pre-existing warranties result from changes in estimates for warranties issued in prior periods. Purchase Commitments The Company has outstanding purchase obligations with its suppliers and other parties that require the purchases of goods or services. The purchase obligations primarily consist of wafer and other inventory purchases, assembly and other manufacturing services, construction of manufacturing and R&D facilities, purchases of production and other equipment, and license arrangements. In May 2022, four June 30, 2024 Total estimated future unconditional purchase commitments to all suppliers and other parties, net of the $120.0 June 30, 2024 2024 (remaining six months) $ 151,590 2025 388,949 2026 1,572 2027 29,476 Total $ 571,587 Litigation The Company is a party to actions and proceedings in the ordinary course of business, including challenges to the enforceability or validity of its intellectual property, claims that the Company’s products infringe on the intellectual property rights of others, and employment matters. The Company may may June 30, 2024 , no

Note 10 - Cash, Cash Equivalent

Note 10 - Cash, Cash Equivalents, Investments and Restricted Cash	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Financial Instruments Disclosure [Text Block]	10. The following is a summary of the Company’s cash, cash equivalents and debt investments (in thousands): June 30, December 31, 2024 2023 Cash $ 357,743 $ 392,329 Money market funds 192,732 135,514 Certificates of deposit 165,120 127,123 Corporate debt securities 22,729 95,101 U.S. treasuries and government agency bonds 568,921 358,409 Auction-rate securities backed by student-loan notes 345 567 Total $ 1,307,590 $ 1,109,043 June 30, December 31, 2024 2023 Reported as: Cash and cash equivalents $ 550,475 $ 527,843 Short-term investments 756,770 580,633 Investment within other long-term assets 345 567 Total $ 1,307,590 $ 1,109,043 The following table summarizes the contractual maturities of the short-term and long-term available-for-sale investments as of June 30, 2024 Amortized Cost Fair Value Due in less than 1 year $ 722,601 $ 721,901 Due in 1 - 5 years 34,969 34,869 Due in greater than 5 years 350 345 Total $ 757,920 $ 757,115 Gross realized gains and losses recognized on the sales of available-for-sale investments were not The following tables summarize the unrealized gain and loss positions related to the available-for-sale investments (in thousands): June 30, 2024 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Money market funds $ 192,732 $ - $ - $ 192,732 Certificates of deposit 165,120 - - 165,120 Corporate debt securities 23,285 1 (557 ) 22,729 U.S. treasuries and government agency bonds 569,165 5 (249 ) 568,921 Auction-rate securities backed by student-loan notes 350 - (5 ) 345 Total $ 950,652 $ 6 $ (811 ) $ 949,847 December 31, 2023 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Money market funds $ 135,514 $ - $ - $ 135,514 Certificates of deposit 127,123 - - 127,123 Corporate debt securities 96,636 4 (1,539 ) 95,101 U.S. treasuries and government agency bonds 358,177 327 (95 ) 358,409 Auction-rate securities backed by student-loan notes 574 - (7 ) 567 Total $ 718,024 $ 331 $ (1,641 ) $ 716,714 The following tables present information about the available-for-sale investments that had been in a continuous unrealized loss position for less than 12 12 June 30, 2024 Less than 12 Months Greater than 12 Months Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate debt securities $ - $ - $ 22,278 $ (557 ) $ 22,278 $ (557 ) U.S. treasuries and government agency bonds 474,947 (214 ) 17,351 (35 ) 492,298 (249 ) Auction-rate securities backed by student-loan notes - - 345 (5 ) 345 (5 ) Total $ 474,947 $ (214 ) $ 39,974 $ (597 ) $ 514,921 $ (811 ) December 31, 2023 Less than 12 Months Greater than 12 Months Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate debt securities $ 20,792 $ (19 ) $ 70,806 $ (1,520 ) $ 91,598 $ (1,539 ) U.S. treasuries and government agency bonds 97,599 (95 ) - - 97,599 (95 ) Auction-rate securities backed by student-loan notes - - 567 (7 ) 567 (7 ) Total $ 118,391 $ (114 ) $ 71,373 $ (1,527 ) $ 189,764 $ (1,641 ) An impairment exists when the fair value of an investment is less than its amortized cost basis. As of June 30, 2024 December 31, 2023 not one not Restricted Cash The following table provides a reconciliation of cash, cash equivalents and restricted cash reported on the Condensed Consolidated Balance Sheets to the amounts reported on the Condensed Consolidated Statements of Cash Flows (in thousands): June 30, December 31, 2024 2023 Cash and cash equivalents $ 550,475 $ 527,843 Restricted cash included in other current assets - 33,204 Restricted cash included in other long-term assets 125 134 Total cash, cash equivalents and restricted cash reported on the Condensed Consolidated Statements of Cash Flows $ 550,600 $ 561,181 The restricted cash included in other current assets as of December 31, 2023 January 2024. 4 June 30, 2024 December 31, 2023

Note 11 - Fair Value Measuremen

Note 11 - Fair Value Measurements	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Fair Value Disclosures [Text Block]	11. Fair Value Hierarchy The Company has estimated the fair value of its financial assets by applying the following hierarchy, which prioritizes the inputs used to measure fair value into three ● Level 1 ● Level 2 may third ● Level 3 Financial Assets Measured at Fair Value on a Recurring Basis The following tables summarize the fair value of the Company’s financial assets measured on a recurring basis (in thousands): June 30, 2024 Total Level 1 Level 2 Level 3 Money market funds $ 192,732 $ 192,732 $ - $ - Certificates of deposit 165,120 - 165,120 - Corporate debt securities 22,729 - 22,729 - U.S. treasuries and government agency bonds 568,921 - 568,921 - Auction-rate securities backed by student-loan notes 345 - - 345 Mutual funds and money market funds under deferred compensation plan 58,928 58,928 - - Total $ 1,008,775 $ 251,660 $ 756,770 $ 345 December 31, 2023 Total Level 1 Level 2 Level 3 Money market funds $ 135,514 $ 135,514 $ - $ - Certificates of deposit 127,123 - 127,123 - Corporate debt securities 95,101 - 95,101 - U.S. treasuries and government agency bonds 358,409 - 358,409 - Auction-rate securities backed by student-loan notes 567 - - 567 Mutual funds and money market funds under deferred compensation plan 54,836 54,836 - - Total $ 771,550 $ 190,350 $ 580,633 $ 567 Redemptions and changes in the fair value of the auction-rate securities classified as Level 3 not

Note 12 - Deferred Compensation

Note 12 - Deferred Compensation Plan	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Compensation and Employee Benefit Plans [Text Block]	12. The following table summarizes the deferred compensation plan balances on the Condensed Consolidated Balance Sheets (in thousands): June 30, December 31, 2024 2023 Deferred compensation plan asset components: Cash surrender value of corporate-owned life insurance policies $ 26,047 $ 23,545 Fair value of mutual funds and money market funds 58,928 54,836 Total $ 84,975 $ 78,381 Deferred compensation plan assets reported in: Other long-term assets $ 84,975 $ 78,381 Deferred compensation plan liabilities reported in: Accrued compensation and related benefits (short-term) $ 7,534 $ 384 Other long-term liabilities 80,115 80,903 Total $ 87,649 $ 81,287

Note 13 - Other Income, Net

Note 13 - Other Income, Net	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Other Nonoperating Income and Expense [Text Block]	13. The components of other income, net, are as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Interest income $ 6,630 $ 5,965 $ 13,544 $ 10,773 Amortization of discount (premium) on available-for-sale securities 5,917 204 10,040 (56 ) Other (5,035 ) 374 (6,532 ) 1,123 Total $ 7,512 $ 6,543 $ 17,052 $ 11,840

Note 14 - Income Taxes

Note 14 - Income Taxes	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Income Tax Disclosure [Text Block]	14. The income tax provision or benefit for interim periods is generally determined using an estimate of the Company’s annual effective tax rate and adjusted for discrete items, if any, in the relevant period. Each quarter the estimate of the annual effective tax rate is updated, and if the Company’s estimated tax rate changes, a cumulative adjustment is made. The income tax expense for the three June 30, 2024 six June 30, 2024 the inclusion of the global intangible low-taxed income (“GILTI”) tax The income tax expense for the three June 30, 2023 six June 30, 2023 On December 27, 2023, 2023 15% €750M 2025. “ ” September 30, 2023. not January 1, 2025, not not June 30, 2024

Note 15 - Accumulated Other Com

Note 15 - Accumulated Other Comprehensive Loss	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Comprehensive Income (Loss) Note [Text Block]	15. The following table summarizes the changes in accumulated other comprehensive loss (in thousands): Unrealized Losses on Foreign Currency Available-for-Sale Translation Securities Adjustments Total Balance as of January 1, 2024 $ (2,184 ) $ (24,878 ) $ (27,062 ) Other comprehensive income (loss) before reclassifications 87 (13,822 ) (13,735 ) Tax effect 248 - 248 Net current period other comprehensive income (loss) 335 (13,822 ) (13,487 ) Balance as of March 31, 2024 (1,849 ) (38,700 ) (40,549 ) Other comprehensive income (loss) before reclassifications 355 (4,313 ) (3,958 ) Amounts reclassified from accumulated other comprehensive loss 63 - 63 Tax effect (50 ) - (50 ) Net current period other comprehensive income (loss) 368 (4,313 ) (3,945 ) Balance as of June 30, 2024 $ (1,481 ) $ (43,013 ) $ (44,494 ) The amount reclassified from accumulated other comprehensive loss for the period presented was recorded in other income, net, on the Condensed Consolidated Statements of Operations.

Note 16 - Dividends and Dividen

Note 16 - Dividends and Dividend Equivalents	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Dividends And Dividend Equivalents [Text Block]	16. Cash Dividend Program The Company has a dividend program approved by the Board of Directors, pursuant to which the Company intends to pay quarterly cash dividends on its common stock. Based on the Company’s historical practice, stockholders of record as of the last business day of the quarter are entitled to receive the quarterly cash dividends when and if declared by the Board of Directors, which are payable to the stockholders in the following month. The Board of Directors declared the following cash dividends (in thousands, except per-share amounts): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Dividend declared per share $ 1.25 $ 1.00 $ 2.50 $ 2.00 Total amount $ 60,872 $ 47,530 $ 121,706 $ 94,860 As of June 30, 2024 December 31, 2023 The declaration of any future cash dividends is at the discretion of the Board of Directors and will depend on, among other things, the Company’s financial condition, results of operations, capital requirements, business conditions, and other factors that the Board of Directors may The Company anticipates that cash used for future dividend payments will come from its domestic cash, cash generated from ongoing U.S. operations, and cash repatriated from its Bermuda subsidiary. The Company also anticipates that earnings from other foreign subsidiaries will continue to be indefinitely reinvested. Cash Dividend Equivalent Rights The Company’s RSUs contain rights to receive cash dividend equivalents, which entitle employees who hold RSUs to the same dividend value per share as holders of common stock. The dividend equivalents are accumulated and paid to the employees when the underlying RSUs vest. Dividend equivalents accumulated on the underlying RSUs are forfeited if the employees do not not June 30, 2024 December 31, 2023 ,

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024
Insider Trading Arr Line Items
Material Terms of Trading Arrangement [Text Block]		5. Certain of our executive officers have entered into trading plans pursuant to Rule 10b5 1 1934, 2004 During the three June 30, 2024 no 10b5 1 no not 10b5 1
Rule 10b5-1 Arrangement Adopted [Flag]	false
Rule 10b5-1 Arrangement Terminated [Flag]	false
Non-Rule 10b5-1 Arrangement Adopted [Flag]	false
Non-Rule 10b5-1 Arrangement Terminated [Flag]	false

Significant Accounting Policies

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
Goodwill and Intangible Assets, Policy [Policy Text Block]	Goodwill and Acquisition-Related Intangible Assets not
Use of Estimates, Policy [Policy Text Block]	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenue and expenses during the reporting period. Significant estimates and assumptions used in these condensed consolidated financial statements primarily include those related to revenue recognition, inventory valuation, valuation of share-based awards, contingencies and income tax valuation allowances. Actual results could differ from these estimates and assumptions, and any such differences may
New Accounting Pronouncements, Policy [Policy Text Block]	New Accounting Pronouncements Not June 30, 2024 In November 2023, 2023 07, 280 January 1, 2024 January 1, 2025, In December 2023, 2023 09, 740 January 1, 2025. not

Note 3 - Stock-based Compensa_2

Note 3 - Stock-based Compensation (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Share-Based Payment Arrangement, Cost by Plan [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Cost of revenue $ 1,611 $ 1,150 $ 3,009 $ 2,297 Research and development 11,682 9,313 22,129 17,927 Selling, general and administrative (“SG&A”) 39,013 27,529 73,094 54,777 Total stock-based compensation expense $ 52,306 $ 37,992 $ 98,232 $ 75,001 Tax benefit related to stock-based compensation (1) $ 798 $ 663 $ 1,506 $ 1,086
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]	Time-Based RSUs PSUs and MPSUs MSUs Total Weighted- Weighted- Weighted- Weighted- Average Average Average Average Grant Date Grant Date Grant Date Grant Date Number of Fair Value Number of Fair Value Number of Fair Value Number of Fair Value Shares Per Share Shares Per Share Shares Per Share Shares Per Share Outstanding at January 1, 2024 102 $ 411.11 482 $ 397.77 1,502 $ 152.89 2,086 $ 222.04 Granted 30 $ 635.67 344 (1) $ 593.33 - $ - 374 $ 596.68 Vested (31 ) $ 363.82 (77 ) $ 307.93 (563 ) $ 68.48 (671 ) $ 109.62 Forfeited (3 ) $ 465.22 (1 ) $ 396.40 (1 ) $ 270.15 (5 ) $ 412.40 Outstanding at June 30, 2024 98 $ 493.16 748 $ 496.84 938 $ 203.33 1,784 $ 342.19
Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]	Six Months Ended June 30, 2024 2023 Expected term (in years) 0.5 0.5 Expected volatility 42.4 % 55.8 % Risk-free interest rate 5.3 % 5.0 % Dividend yield 0.7 % 0.8 %

Note 4 - Acquisition (Tables)

Note 4 - Acquisition (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	Inventory $ 720 Other tangible assets acquired, net of liabilities assumed 1,487 Intangible assets: Developed technology 9,184 IPR&D 2,147 Total identifiable net assets acquired 13,538 Goodwill 19,860 Total net assets acquired $ 33,398

Note 5 - Balance Sheet Compon_2

Note 5 - Balance Sheet Components (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Schedule of Inventory, Current [Table Text Block]	June 30, December 31, 2024 2023 Raw materials $ 93,435 $ 118,917 Work in process 164,116 112,750 Finished goods 169,200 152,035 Total $ 426,751 $ 383,702
Schedule of Other Current Assets [Table Text Block]	June 30, December 31, 2024 2023 Prepaid wafer purchases $ 60,000 $ - Prepaid expenses 27,570 28,964 RSU tax withholding proceeds receivable 71 20,141 Other receivables - 50,000 Restricted cash - 33,204 Other 17,906 15,154 Total $ 105,547 $ 147,463
Schedule of Other Assets, Noncurrent [Table Text Block]	June 30, December 31, 2024 2023 Deferred compensation plan assets $ 84,975 $ 78,381 Prepaid wafer purchases 60,000 120,000 Operating lease right-of-use (“ROU”) and related assets 33,681 8,355 Other 5,210 4,541 Total $ 183,866 $ 211,277
Schedule of Accrued Liabilities [Table Text Block]	June 30, December 31, 2024 2023 Dividends and dividend equivalents $ 62,524 $ 57,697 Stock rotation and sales returns 21,716 18,843 Warranty 14,702 16,906 Customer prepayments 5,564 2,792 Accrued legal expenses 4,249 1,277 Income tax payable 9,641 8,063 Other 12,952 10,213 Total $ 131,348 $ 115,791
Other Noncurrent Liabilities [Table Text Block]	June 30, December 31, 2024 2023 Deferred compensation plan liabilities $ 80,115 $ 80,903 Operating lease liabilities 13,045 5,565 Dividend equivalents 3,515 2,187 Total $ 96,675 $ 88,655

Note 6 - Leases (Tables)

Note 6 - Leases (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Lessee, Operating Lease, Balance Sheet Information [Table Text Block]	June 30, December 31, Financial Statement Line Item 2024 2023 Operating lease ROU assets Other long-term assets $ 15,956 $ 8,355 Operating lease liabilities Other accrued liabilities $ 2,446 $ 2,303 Other long-term liabilities $ 13,045 $ 5,565
Lease, Cost [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Lease costs: Operating lease costs $ 1,014 $ 759 $ 1,911 $ 1,475 Other 648 554 1,198 1,092 Total lease costs $ 1,662 $ 1,313 $ 3,109 $ 2,567 Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 1,027 $ 774 $ 1,700 $ 1,638 ROU assets obtained in exchange for new operating lease liabilities $ 7,809 $ 290 $ 9,271 $ 4,835 June 30, December 31, 2024 2023 Weighted-average remaining lease term (in years) 12.1 4.7 Weighted-average discount rate 5.4 % 4.3 %
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]	2024 (remaining six months) $ 1,617 2025 2,997 2026 2,249 2027 2,012 2028 1,380 Thereafter 12,534 Total remaining lease payments 22,789 Less: imputed interest (7,298 ) Total lease liabilities $ 15,491
Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block]	2024 (remaining six months) $ 525 2025 578 2026 402 2027 373 2028 384 Thereafter 129 Total $ 2,391

Note 7 - Net Income Per Share (

Note 7 - Net Income Per Share (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Numerator: Net income $ 100,366 $ 99,504 $ 192,907 $ 209,306 Denominator: Weighted-average outstanding shares — basic 48,687 47,489 48,660 47,361 Effect of dilutive securities 258 1,267 275 1,344 Weighted-average outstanding shares — diluted 48,945 48,756 48,935 48,705 Net income per share: Basic $ 2.06 $ 2.10 $ 3.96 $ 4.42 Diluted $ 2.05 $ 2.04 $ 3.94 $ 4.30

Note 8 - Segment, Significant_2

Note 8 - Segment, Significant Customers and Geographic Information (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, Customer 2024 2023 2024 2023 Distributor A 38 % 22 % 40 % 21 % Distributor B 17 % 20 % 15 % 21 % Distributor C * 11 % * 10 % June 30, December 31, Customer 2024 2023 Distributor A 41 % 42 % Distributor B 24 % 13 % Distributor C * 10 %
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, Country or Region 2024 2023 2024 2023 China $ 282,514 $ 216,172 $ 545,554 $ 441,224 Taiwan 127,396 70,212 227,846 119,045 South Korea 39,513 40,669 75,050 86,349 Europe 19,105 36,348 36,847 79,451 United States 13,927 27,571 28,747 58,588 Southeast Asia 11,352 21,708 24,591 48,140 Japan 13,552 28,288 26,500 59,103 Other 72 160 181 293 Total $ 507,431 $ 441,128 $ 965,316 $ 892,193
Revenue from External Customers by Products and Services [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, Product Family 2024 2023 2024 2023 Direct Current (“DC”) to DC $ 501,302 $ 418,175 $ 947,367 $ 843,356 Lighting Control 6,129 22,953 17,949 48,837 Total $ 507,431 $ 441,128 $ 965,316 $ 892,193 The following is a summary of long-lived assets by geographic region (in thousands):
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]	June 30, December 31, Country 2024 2023 China $ 207,614 $ 184,685 United States 124,000 119,430 Taiwan 37,071 39,419 Other 31,849 25,418 Total $ 400,534 $ 368,952

Note 9 - Commitments and Cont_2

Note 9 - Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Schedule of Product Warranty Liability [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Balance at beginning of period $ 12,873 $ 19,726 $ 16,906 $ 24,082 Warranties issued 2,225 580 2,325 942 Repairs, replacement and refund (116 ) (1,581 ) (4,130 ) (2,253 ) Changes in liability for pre-existing warranties (280 ) (1,071 ) (399 ) (5,117 ) Balance at end of period $ 14,702 $ 17,654 $ 14,702 $ 17,654
Contractual Obligation, Fiscal Year Maturity [Table Text Block]	2024 (remaining six months) $ 151,590 2025 388,949 2026 1,572 2027 29,476 Total $ 571,587

Note 10 - Cash, Cash Equivale_2

Note 10 - Cash, Cash Equivalents, Investments and Restricted Cash (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Fair Value, by Balance Sheet Grouping [Table Text Block]	June 30, December 31, 2024 2023 Cash $ 357,743 $ 392,329 Money market funds 192,732 135,514 Certificates of deposit 165,120 127,123 Corporate debt securities 22,729 95,101 U.S. treasuries and government agency bonds 568,921 358,409 Auction-rate securities backed by student-loan notes 345 567 Total $ 1,307,590 $ 1,109,043 June 30, December 31, 2024 2023 Reported as: Cash and cash equivalents $ 550,475 $ 527,843 Short-term investments 756,770 580,633 Investment within other long-term assets 345 567 Total $ 1,307,590 $ 1,109,043
Investments Classified by Contractual Maturity Date [Table Text Block]	Amortized Cost Fair Value Due in less than 1 year $ 722,601 $ 721,901 Due in 1 - 5 years 34,969 34,869 Due in greater than 5 years 350 345 Total $ 757,920 $ 757,115
Unrealized Gain (Loss) on Investments [Table Text Block]	June 30, 2024 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Money market funds $ 192,732 $ - $ - $ 192,732 Certificates of deposit 165,120 - - 165,120 Corporate debt securities 23,285 1 (557 ) 22,729 U.S. treasuries and government agency bonds 569,165 5 (249 ) 568,921 Auction-rate securities backed by student-loan notes 350 - (5 ) 345 Total $ 950,652 $ 6 $ (811 ) $ 949,847 December 31, 2023 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Money market funds $ 135,514 $ - $ - $ 135,514 Certificates of deposit 127,123 - - 127,123 Corporate debt securities 96,636 4 (1,539 ) 95,101 U.S. treasuries and government agency bonds 358,177 327 (95 ) 358,409 Auction-rate securities backed by student-loan notes 574 - (7 ) 567 Total $ 718,024 $ 331 $ (1,641 ) $ 716,714
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]	June 30, 2024 Less than 12 Months Greater than 12 Months Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate debt securities $ - $ - $ 22,278 $ (557 ) $ 22,278 $ (557 ) U.S. treasuries and government agency bonds 474,947 (214 ) 17,351 (35 ) 492,298 (249 ) Auction-rate securities backed by student-loan notes - - 345 (5 ) 345 (5 ) Total $ 474,947 $ (214 ) $ 39,974 $ (597 ) $ 514,921 $ (811 ) December 31, 2023 Less than 12 Months Greater than 12 Months Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate debt securities $ 20,792 $ (19 ) $ 70,806 $ (1,520 ) $ 91,598 $ (1,539 ) U.S. treasuries and government agency bonds 97,599 (95 ) - - 97,599 (95 ) Auction-rate securities backed by student-loan notes - - 567 (7 ) 567 (7 ) Total $ 118,391 $ (114 ) $ 71,373 $ (1,527 ) $ 189,764 $ (1,641 )
Restrictions on Cash and Cash Equivalents [Table Text Block]	June 30, December 31, 2024 2023 Cash and cash equivalents $ 550,475 $ 527,843 Restricted cash included in other current assets - 33,204 Restricted cash included in other long-term assets 125 134 Total cash, cash equivalents and restricted cash reported on the Condensed Consolidated Statements of Cash Flows $ 550,600 $ 561,181

Note 11 - Fair Value Measurem_2

Note 11 - Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	June 30, 2024 Total Level 1 Level 2 Level 3 Money market funds $ 192,732 $ 192,732 $ - $ - Certificates of deposit 165,120 - 165,120 - Corporate debt securities 22,729 - 22,729 - U.S. treasuries and government agency bonds 568,921 - 568,921 - Auction-rate securities backed by student-loan notes 345 - - 345 Mutual funds and money market funds under deferred compensation plan 58,928 58,928 - - Total $ 1,008,775 $ 251,660 $ 756,770 $ 345 December 31, 2023 Total Level 1 Level 2 Level 3 Money market funds $ 135,514 $ 135,514 $ - $ - Certificates of deposit 127,123 - 127,123 - Corporate debt securities 95,101 - 95,101 - U.S. treasuries and government agency bonds 358,409 - 358,409 - Auction-rate securities backed by student-loan notes 567 - - 567 Mutual funds and money market funds under deferred compensation plan 54,836 54,836 - - Total $ 771,550 $ 190,350 $ 580,633 $ 567

Note 12 - Deferred Compensati_2

Note 12 - Deferred Compensation Plan (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-Based Payments and Postretirement Benefits by Title of Individual and Type of Deferred Compensation [Table Text Block]	June 30, December 31, 2024 2023 Deferred compensation plan asset components: Cash surrender value of corporate-owned life insurance policies $ 26,047 $ 23,545 Fair value of mutual funds and money market funds 58,928 54,836 Total $ 84,975 $ 78,381 Deferred compensation plan assets reported in: Other long-term assets $ 84,975 $ 78,381 Deferred compensation plan liabilities reported in: Accrued compensation and related benefits (short-term) $ 7,534 $ 384 Other long-term liabilities 80,115 80,903 Total $ 87,649 $ 81,287

Note 13 - Other Income, Net (Ta

Note 13 - Other Income, Net (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Schedule of Other Nonoperating Income (Expense) [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Interest income $ 6,630 $ 5,965 $ 13,544 $ 10,773 Amortization of discount (premium) on available-for-sale securities 5,917 204 10,040 (56 ) Other (5,035 ) 374 (6,532 ) 1,123 Total $ 7,512 $ 6,543 $ 17,052 $ 11,840

Note 15 - Accumulated Other C_2

Note 15 - Accumulated Other Comprehensive Loss (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Unrealized Losses on Foreign Currency Available-for-Sale Translation Securities Adjustments Total Balance as of January 1, 2024 $ (2,184 ) $ (24,878 ) $ (27,062 ) Other comprehensive income (loss) before reclassifications 87 (13,822 ) (13,735 ) Tax effect 248 - 248 Net current period other comprehensive income (loss) 335 (13,822 ) (13,487 ) Balance as of March 31, 2024 (1,849 ) (38,700 ) (40,549 ) Other comprehensive income (loss) before reclassifications 355 (4,313 ) (3,958 ) Amounts reclassified from accumulated other comprehensive loss 63 - 63 Tax effect (50 ) - (50 ) Net current period other comprehensive income (loss) 368 (4,313 ) (3,945 ) Balance as of June 30, 2024 $ (1,481 ) $ (43,013 ) $ (44,494 )

Note 16 - Dividends and Divid_2

Note 16 - Dividends and Dividend Equivalents (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Dividends Declared [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Dividend declared per share $ 1.25 $ 1.00 $ 2.50 $ 2.00 Total amount $ 60,872 $ 47,530 $ 121,706 $ 94,860

Note 2 - Revenue Recognition (D

Note 2 - Revenue Recognition (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Contract with Customer, Liability, Current	$ 5,564		$ 5,564		$ 2,792
Minimum [Member]
Contract with Customer, Payment Term (Day)			30 days
Maximum [Member]
Contract with Customer, Payment Term (Day)			90 days
Certain Customers in China [Member]
Contract with Customer, Payment Term Required Prior to Shipping Products (Week)			14 days
Certain Customers in China [Member] | Accrued Liabilities, Current [Member]
Contract with Customer, Liability, Current	$ 5,600		$ 5,600		$ 2,800
Product [Member]
Percentage of Revenue	99%	99%	99%	99%
Product Sales Through Distribution Arrangements [Member] | Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage	90%	80%	87%	80%

Note 3 - Stock-based Compensa_3

Note 3 - Stock-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 11, 2020	Feb. 29, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Aug. 16, 2023	Nov. 13, 2014
Share Price (in dollars per share)		$ 632.98	$ 821.68		$ 821.68
Proceeds from Stock Plans					$ 4,606	$ 3,737
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested			$ 25,500	$ 98,100	428,600	$ 239,700
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding			1,400,000		1,400,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount			$ 350,800		$ 350,800
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)					2 years
Time-Based RSUs [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)					30,000
Time-Based RSUs [Member] | Employees [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)					30,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)					4 years
Time-Based RSUs [Member] | Director [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)					1 year
PSU 2024 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Price Per Share Payable Upon Vesting of Equity Instruments Other than Options (in dollars per share)					$ 30
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)					3 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate					49.40%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate					4.10%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate					0.80%
PSU 2024 [Member] | Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		50,000
Maximum Stock Compensation Costs					$ 154,300
PSU 2024 [Member] | Executive Officer [Member] | Share-Based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed		300%
PSU 2024 [Member] | Executive Officer [Member] | Share-Based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed		100%
PSU 2024 [Member] | Executive Officer [Member] | Share-Based Payment Arrangement, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed		50%
PSU 2024 [Member] | Non-Executive Employees [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		11,000
Maximum Stock Compensation Costs					$ 17,700
PSU 2024 [Member] | Non-Executive Employees [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed		300%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Minimum Percentage Allowed		200%
PSU 2024 [Member] | Non-Executive Employees [Member] | Vesting First Quarter of 2026 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		50%
The2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)								5,500,000
Amended and Restated 2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares)	10,500,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)			3,900,000		3,900,000
The 2004 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)							4,400,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)			4,400,000		4,400,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount			$ 400		$ 400
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)			0	0	11,000	9,000
Employee Stock Purchase Plan Shares Issued, Intrinsic Value					$ 3,500	$ 700
Proceeds from Stock Plans					$ 4,600	$ 3,700

Note 3 - Stock-based Compensa_4

Note 3 - Stock-based Compensation - Stock-based Compensation Plan Expenses (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share based compensation expense		$ 52,306	$ 37,992	$ 98,232	$ 75,001
Tax benefit related to stock-based compensation	[1]	798	663	1,506	1,086
Cost of Sales [Member]
Share based compensation expense		1,611	1,150	3,009	2,297
Research and Development Expense [Member]
Share based compensation expense		11,682	9,313	22,129	17,927
Selling, General and Administrative Expenses [Member]
Share based compensation expense		$ 39,013	$ 27,529	$ 73,094	$ 54,777
[1]Amount reflects the tax benefit related to stock-based compensation recorded for equity awards that are expected to generate tax deductions when they vest in future periods. Equity awards granted to the Company’s executive officers are subject to the tax deduction limitations set by Section 162(m) of the Internal Revenue Code.

Note 3 - Stock-based Compensa_5

Note 3 - Stock-based Compensation - RSU Summary (Details) shares in Thousands	6 Months Ended
	Jun. 30, 2024 $ / shares shares
Time-Based RSUs [Member]
Balance (in shares) | shares	102
Outstanding, weighted average (in dollars per share) | $ / shares	$ 411.11
Granted (in shares) | shares	30
Granted, weighted average (in dollars per share) | $ / shares	$ 635.67
Vested (in shares) | shares	(31)
Vested, weighted average (in dollars per share) | $ / shares	$ 363.82
Forfeited (in shares) | shares	(3)
Forfeited, weighted average (in dollars per share) | $ / shares	$ 465.22
Balance (in shares) | shares	98
Outstanding, weighted average (in dollars per share) | $ / shares	$ 493.16
PSUs and MPSUs [Member]
Balance (in shares) | shares	482
Outstanding, weighted average (in dollars per share) | $ / shares	$ 397,770
Granted (in shares) | shares	344	[1]
Granted, weighted average (in dollars per share) | $ / shares	$ 593.33
Vested (in shares) | shares	(77)
Vested, weighted average (in dollars per share) | $ / shares	$ 307.93
Forfeited (in shares) | shares	(1)
Forfeited, weighted average (in dollars per share) | $ / shares	$ 396.4
Balance (in shares) | shares	748
Outstanding, weighted average (in dollars per share) | $ / shares	$ 496.84
MSUs [Member]
Balance (in shares) | shares	1,502
Outstanding, weighted average (in dollars per share) | $ / shares	$ 152.89
Granted (in shares) | shares	0
Granted, weighted average (in dollars per share) | $ / shares	$ 0
Vested (in shares) | shares	(563)
Vested, weighted average (in dollars per share) | $ / shares	$ 68.48
Forfeited (in shares) | shares	(1)
Forfeited, weighted average (in dollars per share) | $ / shares	$ 270.15
Balance (in shares) | shares	938
Outstanding, weighted average (in dollars per share) | $ / shares	$ 203.33
Time-Based RSUs PSUs MSUs [Member]
Balance (in shares) | shares	2,086
Outstanding, weighted average (in dollars per share) | $ / shares	$ 222.04
Granted (in shares) | shares	374
Granted, weighted average (in dollars per share) | $ / shares	$ 596.68
Vested (in shares) | shares	(671)
Vested, weighted average (in dollars per share) | $ / shares	$ 109.62
Forfeited (in shares) | shares	(5)
Forfeited, weighted average (in dollars per share) | $ / shares	$ 412.4
Balance (in shares) | shares	1,784
Outstanding, weighted average (in dollars per share) | $ / shares	$ 342.19
[1]Amount reflects the number of awards that may ultimately be earned based on management's probability assessment of the achievement of performance conditions at each reporting period.

Note 3 - Stock-based Compensa_6

Note 3 - Stock-based Compensation - Valuation Assumptions (Details) - 2004 Employee Stock Plan [Member] - Employee Stock Purchase Plan [Member]	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Expected term (Year)	6 months	6 months
Expected volatility	42.40%	55.80%
Risk-free interest rate	5.30%	5%
Dividend yield	0.70%	0.80%

Note 4 - Acquisition (Details T

Note 4 - Acquisition (Details Textual) - Axign [Member] - USD ($) $ in Millions	Jan. 03, 2024	Jun. 30, 2024
Business Acquisition, Percentage of Voting Interests Acquired	100%
Business Combination, Consideration Transferred	$ 33.4
Payment to Acquire Business Held in Escrow	$ 3.8
Business Acquisition, Transaction Costs		$ 0.4

Note 4 - Acquisitions - Prelimi

Note 4 - Acquisitions - Preliminary Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jan. 03, 2024	Dec. 31, 2023
Goodwill	$ 26,080		$ 6,571
Axign [Member]
Inventory		$ 720
Other tangible assets acquired, net of liabilities assumed		1,487
Developed technology		9,184
IPR&D		2,147
Total identifiable net assets acquired		13,538
Goodwill		19,860
Total net assets acquired		$ 33,398

Note 5 - Balance Sheet Compon_3

Note 5 - Balance Sheet Components (Details Textual) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Prepaid Wafer Purchase, Current	$ 60,000
Other Receivables, Net, Current	$ 0	$ 50,000

Note 5 - Balance Sheet Compon_4

Note 5 - Balance Sheet Components - Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Raw materials	$ 93,435	$ 118,917
Work in process	164,116	112,750
Finished goods	169,200	152,035
Total	$ 426,751	$ 383,702

Note 5 - Balance Sheet Compon_5

Note 5 - Balance Sheet Components - Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Prepaid wafer purchases	$ 60,000	$ 0
Prepaid expenses	27,570	28,964
RSU tax withholding proceeds receivable	71	20,141
Other receivables	0	50,000
Restricted cash	0	33,204
Other	17,906	15,154
Total	$ 105,547	$ 147,463

Note 5 - Balance Sheet Compon_6

Note 5 - Balance Sheet Components - Other Long-term Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Deferred compensation plan assets	$ 84,975	$ 78,381
Prepaid wafer purchases	60,000	120,000
Operating lease right-of-use (“ROU”) and related assets	33,681	8,355
Other	5,210	4,541
Total	$ 183,866	$ 211,277

Note 5 - Balance Sheet Compon_7

Note 5 - Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Dividends and dividend equivalents	$ 62,524	$ 57,697
Stock rotation and sales returns	21,716	18,843
Warranty	14,702	16,906
Customer prepayments	5,564	2,792
Accrued legal expenses	4,249	1,277
Income tax payable	9,641	8,063
Other	12,952	10,213
Total	$ 131,348	$ 115,791

Note 5 - Balance Sheet Compon_8

Note 5 - Balance Sheet Components - Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Deferred compensation plan liabilities	$ 80,115	$ 80,903
Operating lease liabilities	13,045	5,565
Dividend equivalents	3,515	2,187
Total	$ 96,675	$ 88,655

Note 6 - Leases (Details Textua

Note 6 - Leases (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Lessee, Operating Lease, Lease Not yet Commenced, Future Lease Obligations	$ 0		$ 0
Operating Lease, Lease Income, Lease Payments	$ 200	$ 300	$ 400	$ 800
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	1 year		1 year
Lessor, Operating Lease, Remaining Lease Term (Year)			1 year
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	20 years		20 years
Lessee, Operating Lease, Renewal Term (Year)	5 years		5 years
Lessor, Operating Lease, Remaining Lease Term (Year)			5 years
Lessor, Operating Lease, Renewal Term (Year)	5 years		5 years

Note 6 - Leases - Balance Sheet

Note 6 - Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Operating lease ROU assets	$ 15,956	$ 8,355
Operating lease liabilities, current	2,446	2,303
Operating lease liabilities, noncurrent	$ 13,045	$ 5,565

Note 6 - Leases - Balance She_2

Note 6 - Leases - Balance Sheet Information (Details) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Assets [Abstract]
Other Assets, Noncurrent	$ 183,866	$ 211,277
Liabilities, Current [Abstract]
Accrued Liabilities, Current	131,348	115,791
Liabilities, Noncurrent [Abstract]
Other Liabilities, Noncurrent	$ 96,675	$ 88,655
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued Liabilities, Current	Accrued Liabilities, Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent

Note 6 - Leases - Lease Cost (D

Note 6 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Operating lease costs	$ 1,014	$ 759	$ 1,911	$ 1,475
Other	648	554	1,198	1,092
Total lease costs	1,662	1,313	3,109	2,567
Operating cash flows for operating leases	1,027	774	1,700	1,638
ROU assets obtained in exchange for new operating lease liabilities	$ 7,809	$ 290	$ 9,271	$ 4,835
Weighted-average remaining lease term (in years) (Year)	12 years 1 month 6 days		12 years 1 month 6 days		4 years 8 months 12 days
Weighted-average discount rate	5.40%		5.40%		4.30%

Note 6 - Leases - Maturities of

Note 6 - Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Jun. 30, 2024 USD ($)
2024 (remaining six months)	$ 1,617
2025	2,997
2026	2,249
2027	2,012
2028	1,380
Thereafter	12,534
Total remaining lease payments	22,789
Less: imputed interest	(7,298)
Total lease liabilities	$ 15,491

Note 6 - Leases - Maturities _2

Note 6 - Leases - Maturities of Income Related to Lease Payments (Details) $ in Thousands	Jun. 30, 2024 USD ($)
2024 (remaining six months)	$ 525
2025	578
2026	402
2027	373
2028	384
Thereafter	129
Total	$ 2,391

Note 7 - Net Income Per Share_2

Note 7 - Net Income Per Share (Details Textual) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024	Oct. 31, 2023
Stock Repurchased and Retired During Period, Shares (in shares)	6,300	12,400
Stock Repurchased and Retired During Period, Value	$ 4,550	$ 8,626
Maximum [Member]
Share Repurchase Program, Authorized, Amount			$ 640,000

Note 7 - Net Income Per Share -

Note 7 - Net Income Per Share - Net Income Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net income	$ 100,366	$ 99,504	$ 192,907	$ 209,306
Weighted-average outstanding shares — basic (in shares)	48,687	47,489	48,660	47,361
Effect of dilutive securities (in shares)	258	1,267	275	1,344
Weighted-average outstanding shares — diluted (in shares)	48,945	48,756	48,935	48,705
Earnings per share, basic (in dollars per share)	$ 2.06	$ 2.1	$ 3.96	$ 4.42
Earnings per share, diluted (in dollars per share)	$ 2.05	$ 2.04	$ 3.94	$ 4.3

Note 8 - Segment, Significant_3

Note 8 - Segment, Significant Customers and Geographic Information (Details Textual)	6 Months Ended
	Jun. 30, 2024
Number of Reportable Segments	1

Note 8 - Segment, Significant_4

Note 8 - Segment, Significant Customers and Geographic Information - Customers with Sales and Accounts Receivable Greater Than 10% (Details) - Customer Concentration Risk [Member]	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue Benchmark [Member] | Distributor A [Member]
Concentration risk	38%	22%	40%	21%
Revenue Benchmark [Member] | Distributor B [Member]
Concentration risk	17%	20%	15%	21%
Revenue Benchmark [Member] | Distributor C [Member]
Concentration risk		11%		10%
Accounts Receivable [Member] | Distributor A [Member]
Concentration risk			41%	42%
Accounts Receivable [Member] | Distributor B [Member]
Concentration risk			24%	13%
Accounts Receivable [Member] | Distributor C [Member]
Concentration risk				10%

Note 8 - Segment, Significant_5

Note 8 - Segment, Significant Customers and Geographic Information - Revenue By Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue	$ 507,431	$ 441,128	$ 965,316	$ 892,193
CHINA
Revenue	282,514	216,172	545,554	441,224
TAIWAN
Revenue	127,396	70,212	227,846	119,045
KOREA, REPUBLIC OF
Revenue	39,513	40,669	75,050	86,349
Europe [Member]
Revenue	19,105	36,348	36,847	79,451
UNITED STATES
Revenue	13,927	27,571	28,747	58,588
South East Asia [Member]
Revenue	11,352	21,708	24,591	48,140
JAPAN
Revenue	13,552	28,288	26,500	59,103
Other Region [Member]
Revenue	$ 72	$ 160	$ 181	$ 293

Note 8 - Segment, Significant_6

Note 8 - Segment, Significant Customers and Geographic Information - Revenue By Product Family (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue	$ 507,431	$ 441,128	$ 965,316	$ 892,193
DC To DC Products [Member]
Revenue	501,302	418,175	947,367	843,356
Lighting Control Products [Member]
Revenue	$ 6,129	$ 22,953	$ 17,949	$ 48,837

Note 8 - Segment, Significant_7

Note 8 - Segment, Significant Customers and Geographic Information - Long Lived Assets By Geographic Region (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Long lived assets by region	$ 400,534	$ 368,952
CHINA
Long lived assets by region	207,614	184,685
UNITED STATES
Long lived assets by region	124,000	119,430
TAIWAN
Long lived assets by region	37,071	39,419
Other Region [Member]
Long lived assets by region	$ 31,849	$ 25,418

Note 9 - Commitments and Cont_3

Note 9 - Commitments and Contingencies (Details Textual) $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($)
Purchase Obligation	$ 571,587
Prepaid Wafer Purchase, Current	60,000
Long-term Supply Agreement [Member]
Purchase Obligation	$ 120,000
Minimum [Member]
Warranty Term (Year)	1 year
Maximum [Member]
Warranty Term (Year)	2 years

Note 9 - Commitments and Cont_4

Note 9 - Commitments and Contingencies - Changes in Warranty Reserve (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Balance	$ 12,873	$ 19,726	$ 16,906	$ 24,082
Warranties issued	2,225	580	2,325	942
Repairs, replacement and refund	(116)	(1,581)	(4,130)	(2,253)
Changes in liability for pre-existing warranties	(280)	(1,071)	(399)	(5,117)
Balance	$ 14,702	$ 17,654	$ 14,702	$ 17,654

Note 9 - Commitments and Cont_5

Note 9 - Commitments and Contingencies - Estimated Future Unconditional Purchase Commitments (Details) $ in Thousands	Jun. 30, 2024 USD ($)
2024 (remaining six months)	$ 151,590
2025	388,949
2026	1,572
2027	29,476
Total	$ 571,587

Note 10 - Cash, Cash Equivale_3

Note 10 - Cash, Cash Equivalents, Investments and Restricted Cash - Cash, Cash Equivalents, Short-term and Long-term Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Cash	$ 357,743	$ 392,329
Money market funds	192,732	135,514
Certificates of deposit	165,120	127,123
U.S. treasuries and government agency bonds	568,921	358,409
Total	1,307,590	1,109,043
Cash and cash equivalents	550,475	527,843
Short-term investments	756,770	580,633
Investment within other long-term assets	345	567
Corporate Debt Securities [Member]
Available-for-sale securities	22,729	95,101
Auction Rate Securities [Member]
Available-for-sale securities	$ 345	$ 567

Note 10 - Cash, Cash Equivale_4

Note 10 - Cash, Cash Equivalents, Investments and Restricted Cash - Investment Maturity Classification (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Due in less than 1 year, Amortized cost	$ 722,601
Due in less than 1 year, fair value	721,901
Due in 1 - 5 years, Amortized cost	34,969
Due in 1 - 5 years, fair value	34,869
Due in greater than 5 years, Amortized cost	350
Due in greater than 5 years, fair value	345
Total, Amortized cost	757,920
Total, fair value	$ 757,115

Note 10 - Cash, Cash Equivale_5

Note 10 - Cash, Cash Equivalents, Investments and Restricted Cash - Unrealized Gains and Losses on Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Amortized Cost	$ 950,652	$ 718,024
Unrealized Gains	6	331
Unrealized Losses	(811)	(1,641)
Total Fair Value	949,847	716,714
Money Market Funds [Member]
Amortized Cost	192,732	135,514
Unrealized Gains	0	0
Unrealized Losses	0	0
Total Fair Value	192,732	135,514
Certificates of Deposit [Member]
Amortized Cost	165,120	127,123
Unrealized Gains	0	0
Unrealized Losses	0	0
Total Fair Value	165,120	127,123
Corporate Debt Securities [Member]
Amortized Cost	23,285	96,636
Unrealized Gains	1	4
Unrealized Losses	(557)	(1,539)
Total Fair Value	22,729	95,101
US Government Agencies Short-Term Debt Securities [Member]
Amortized Cost	569,165	358,177
Unrealized Gains	5	327
Unrealized Losses	(249)	(95)
Total Fair Value	568,921	358,409
Auction Rate Securities [Member]
Amortized Cost	350	574
Unrealized Gains	0	0
Unrealized Losses	(5)	(7)
Total Fair Value	$ 345	$ 567

Note 10 - Cash, Cash Equivale_6

Note 10 - Cash, Cash Equivalents, Investments and Restricted Cash - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Continuous Unrealized Loss Position, Less than 12 Months	$ 474,947	$ 118,391
Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(214)	(114)
Continuous Unrealized Loss Position, 12 Months or Longer	39,974	71,373
Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(597)	(1,527)
Unrealized Loss Position, Total	514,921	189,764
Unrealized Loss Position, Accumulated Loss, Total	(811)	(1,641)
Corporate Debt Securities [Member]
Continuous Unrealized Loss Position, Less than 12 Months	0	20,792
Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	(19)
Continuous Unrealized Loss Position, 12 Months or Longer	22,278	70,806
Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(557)	(1,520)
Unrealized Loss Position, Total	22,278	91,598
Unrealized Loss Position, Accumulated Loss, Total	(557)	(1,539)
US Treasury and Government Short-Term Debt Securities [Member]
Continuous Unrealized Loss Position, Less than 12 Months	474,947
Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(214)
Continuous Unrealized Loss Position, 12 Months or Longer	17,351
Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(35)
Unrealized Loss Position, Total	492,298
Unrealized Loss Position, Accumulated Loss, Total	(249)
US Government Agencies Short-Term Debt Securities [Member]
Continuous Unrealized Loss Position, Less than 12 Months		97,599
Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(95)
Continuous Unrealized Loss Position, 12 Months or Longer		0
Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Unrealized Loss Position, Total		97,599
Unrealized Loss Position, Accumulated Loss, Total		(95)
Auction Rate Securities [Member]
Continuous Unrealized Loss Position, Less than 12 Months	0	0
Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Continuous Unrealized Loss Position, 12 Months or Longer	345	567
Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(5)	(7)
Unrealized Loss Position, Total	345	567
Unrealized Loss Position, Accumulated Loss, Total	$ (5)	$ (7)

Note 10 - Cash, Cash Equivale_7

Note 10 - Cash, Cash Equivalents, Investments and Restricted Cash - Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Cash and cash equivalents	$ 550,475	$ 527,843
Restricted cash	0	33,204
Restricted cash included in other long-term assets	125	134
Total cash, cash equivalents and restricted cash reported on the Condensed Consolidated Statements of Cash Flows	$ 550,600	$ 561,181	$ 507,084	$ 288,729

Note 11 - Fair Value Measurem_3

Note 11 - Fair Value Measurements - Financial Assets and Liabilities, Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Total Fair Value	$ 949,847	$ 716,714
Assets, fair value	1,008,775	771,550
Fair Value, Inputs, Level 1 [Member]
Assets, fair value	251,660	190,350
Fair Value, Inputs, Level 2 [Member]
Assets, fair value	756,770	580,633
Fair Value, Inputs, Level 3 [Member]
Assets, fair value	345	567
Money Market Funds [Member]
Total Fair Value	192,732	135,514
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	192,732	135,514
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	0	0
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	0	0
Certificates of Deposit [Member]
Total Fair Value	165,120	127,123
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	0	0
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	165,120	127,123
Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	0	0
Corporate Debt Securities [Member]
Total Fair Value	22,729	95,101
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	0	0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	22,729	95,101
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	0	0
US Government Agencies Short-Term Debt Securities [Member]
Total Fair Value	568,921	358,409
US Government Agencies Short-Term Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	0	0
US Government Agencies Short-Term Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	568,921	358,409
US Government Agencies Short-Term Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	0	0
Auction Rate Securities [Member]
Total Fair Value	345	567
Auction Rate Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	0	0
Auction Rate Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	0	0
Auction Rate Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	345	567
Mutual Fund [Member]
Total Fair Value	58,928	54,836
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	58,928	54,836
Mutual Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	0	0
Mutual Fund [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	$ 0	$ 0

Note 12 - Deferred Compensati_3

Note 12 - Deferred Compensation Plan - Summary of Deferred Compensation Plan (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Deferred compensation plan assets	$ 84,975	$ 78,381
Deferred compensation plan liabilities	87,649	81,287
Other Long-term Assets [Member]
Deferred compensation plan assets	84,975	78,381
Accrued Compensation and Related Benefits [Member]
Deferred compensation plan liabilities	7,534	384
Other Long-term Liabilities [Member]
Deferred compensation plan liabilities	80,115	80,903
Cash Surrender Value [Member]
Deferred compensation plan assets	26,047	23,545
Mutual Funds and Money Market Funds, Fair Value [Member]
Deferred compensation plan assets	$ 58,928	$ 54,836

Note 13 - Other Income, Net - I

Note 13 - Other Income, Net - Interest and Other Income Components (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Interest income	$ 6,630	$ 5,965	$ 13,544	$ 10,773
Amortization of discount (premium) on available-for-sale securities	5,917	204	10,040	(56)
Other	(5,035)	374	(6,532)	1,123
Total	$ 7,512	$ 6,543	$ 17,052	$ 11,840

Note 14 - Income Taxes (Details

Note 14 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Tax Expense (Benefit)	$ 23,682	$ 19,364	$ 36,168	$ 39,135
Effective Income Tax Rate Reconciliation, Percent	19.10%	16.30%	15.80%	15.80%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21%	21%

Note 15 - Accumulated Other C_3

Note 15 - Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2024	Mar. 31, 2024
Balance	$ 2,113,557	$ 2,049,939
Balance	2,195,858	2,113,557
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(1,849)	(2,184)
Other comprehensive income (loss) before reclassifications	355	87
Tax effect	(50)	248
Amounts reclassified from accumulated other comprehensive loss	63
Other comprehensive loss, net of tax	368	335
Balance	(1,481)	(1,849)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(38,700)	(24,878)
Other comprehensive income (loss) before reclassifications	(4,313)	(13,822)
Tax effect	0	0
Amounts reclassified from accumulated other comprehensive loss	0
Other comprehensive loss, net of tax	(4,313)	(13,822)
Balance	(43,013)	(38,700)
AOCI Attributable to Parent [Member]
Balance	(40,549)	(27,062)
Other comprehensive income (loss) before reclassifications	(3,958)	(13,735)
Tax effect	(50)	248
Amounts reclassified from accumulated other comprehensive loss	63
Other comprehensive loss, net of tax	(3,945)	(13,487)
Balance	$ (44,494)	$ (40,549)

Note 16 - Dividends and Divid_3

Note 16 - Dividends and Dividend Equivalents (Details Textual) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Dividends Payable, Current	$ 60.9	$ 47.9
Accrued Dividend Equivalents	$ 5.2	$ 11.9

Note 16 - Dividends and Divid_4

Note 16 - Dividends and Dividend Equivalents - Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Dividend declared per share (in dollars per share)	$ 1.25	$ 1	$ 2.5	$ 2
Total amount	$ 60,872	$ 47,530	$ 121,706	$ 94,860