Monolithic Power Systems (MPWR) 10-K 29 Feb 24 2023 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2023	Feb. 22, 2024	Jun. 30, 2023
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	FY
Document Fiscal Year Focus	2023
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Document Transition Report	false
Entity File Number	000-51026
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 Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 16,400,000,000
Entity Common Stock, Shares Outstanding		48,661,000
Auditor Firm ID	42
Auditor Name	Ernst & Young LLP
Auditor Location	San Jose, California

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 527,843	$ 288,607
Short-term investments	580,633	449,266
Accounts receivable, net	179,858	182,714
Inventories	383,702	447,290
Other current assets	147,463	42,742
Total current assets	1,819,499	1,410,619
Property and equipment, net	368,952	357,157
Goodwill	6,571	6,571
Deferred tax assets, net	28,054	35,252
Other long-term assets	211,277	249,286
Total assets	2,434,353	2,058,885
Current liabilities:
Accounts payable	62,958	61,461
Accrued compensation and related benefits	56,286	88,260
Other accrued liabilities	115,791	113,679
Total current liabilities	235,035	263,400
Income tax liabilities	60,724	53,509
Other long-term liabilities	88,655	73,374
Total liabilities	384,414	390,283
Commitments and contingencies
Stockholders’ equity:
Common stock and additional paid-in capital: $0.001 par value; shares authorized: 150,000; shares issued and outstanding: 48,028 and 47,107, respectively	1,129,937	975,276
Retained earnings	947,064	716,403
Accumulated other comprehensive loss	(27,062)	(23,077)
Total stockholders’ equity	2,049,939	1,668,602
Total liabilities and stockholders’ equity	$ 2,434,353	$ 2,058,885

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares shares in Thousands	Dec. 31, 2023	Dec. 31, 2022
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)	48,028	47,107
Common stock, shares outstanding (in shares)	48,028	47,107

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue	$ 1,821,072	$ 1,794,148	$ 1,207,798
Cost of revenue	799,953	745,596	522,339
Gross profit	1,021,119	1,048,552	685,459
Operating expenses:
Research and development	263,643	240,171	190,627
Selling, general and administrative	275,740	281,596	232,415
Total operating expenses	539,383	521,767	423,042
Operating income	481,736	526,785	262,417
Other income (expense), net	24,105	(1,848)	9,802
Income before income taxes	505,841	524,937	272,219
Income tax expense	78,467	87,265	30,196
Net income	$ 427,374	$ 437,672	$ 242,023
Net income per share
Basic (in dollars per share)	$ 8.98	$ 9.37	$ 5.28
Diluted (in dollars per share)	$ 8.76	$ 9.05	$ 5.05
Weighted-average shares outstanding:
Basic (in shares)	47,610	46,727	45,851
Diluted (in shares)	48,771	48,358	47,889

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net income	$ 427,374	$ 437,672	$ 242,023
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(9,528)	(32,293)	8,404
Change in unrealized gains and losses on available-for-sale securities, net of tax of $(1,352), $184 and $613, respectively	5,543	(6,664)	(2,664)
Other comprehensive income (loss), net of tax	(3,985)	(38,957)	5,740
Comprehensive income	$ 423,389	$ 398,715	$ 247,763

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Change in unrealized gain (loss) on available-for-sale securities, tax	$ (1,352)	$ 184	$ 613

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - 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, 2020	45,267,000
Balance at Dec. 31, 2020	$ 657,701	$ 298,746	$ 10,140	$ 966,587
Net income	0	242,023	0	242,023
Other comprehensive income	0	0	5,740	5,740
Dividends and dividend equivalents declared	$ 0	(115,890)	0	(115,890)
Common stock issued under the employee equity incentive plan (in shares)	972,000
Common stock issued under the employee equity incentive plan	$ 17,322	0	0	17,322
Common stock issued under the employee stock purchase plan (in shares)	17,000
Common stock issued under the employee stock purchase plan	$ 4,670	0	0	4,670
Stock-based compensation expense	$ 123,533	0	0	123,533
Balance (in shares) at Dec. 31, 2021	46,256,000
Balance at Dec. 31, 2021	$ 803,226	424,879	15,880	1,243,985
Net income	0	437,672	0	437,672
Other comprehensive income	0	0	(38,957)	(38,957)
Dividends and dividend equivalents declared	$ 0	(146,148)	0	(146,148)
Common stock issued under the employee equity incentive plan (in shares)	837,000
Common stock issued under the employee equity incentive plan	$ 5,358	0	0	5,358
Common stock issued under the employee stock purchase plan (in shares)	14,000
Common stock issued under the employee stock purchase plan	$ 5,877	0	0	5,877
Stock-based compensation expense	$ 160,815	0	0	$ 160,815
Balance (in shares) at Dec. 31, 2022	47,107,000			47,107,000
Balance at Dec. 31, 2022	$ 975,276	716,403	(23,077)	$ 1,668,602
Net income	0	427,374	0	427,374
Other comprehensive income	0	0	(3,985)	(3,985)
Dividends and dividend equivalents declared	$ 0	(196,713)	0	(196,713)
Common stock issued under the employee equity incentive plan (in shares)	911,000
Common stock issued under the employee equity incentive plan	$ 1,118	0	0	1,118
Common stock issued under the employee stock purchase plan (in shares)	17,000
Common stock issued under the employee stock purchase plan	$ 7,568	0	0	7,568
Stock-based compensation expense	$ 149,716	0	0	$ 149,716
Repurchase of common stock (in shares)	(7,000)			(7,000)
Repurchase of common stock	$ (3,741)	0	0	$ (3,741)
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

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parentheticals) - $ / shares	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Dividends and dividend equivalents declared per share (in dollars per share)	$ 1	$ 4	$ 3	$ 2.4

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 427,374	$ 437,672	$ 242,023
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	40,168	37,114	28,699
Amortization of premium (discount) on available-for-sale securities	(5,277)	4,375	4,674
Loss (gain) on deferred compensation plan investments	(8,505)	6,600	(4,563)
Deferred taxes, net	5,865	(13,220)	(2,772)
Gain on sale of equity investment	(1,424)	0	0
Stock-based compensation expense	149,711	160,992	123,479
Other	(23)	97	110
Changes in operating assets and liabilities:
Accounts receivable	2,884	(77,903)	(37,976)
Inventories	63,583	(188,073)	(102,323)
Other assets	(24,310)	(177,284)	(15,311)
Accounts payable	4,797	(11,240)	32,926
Accrued compensation and related benefits	(31,187)	28,514	16,536
Income tax liabilities	(308)	16,559	11,771
Other accrued liabilities	14,865	22,471	22,737
Net cash provided by operating activities	638,213	246,674	320,010
Cash flows from investing activities:
Purchases of property and equipment	(57,578)	(58,843)	(94,420)
Purchases of investments	(582,603)	(65,785)	(394,886)
Maturities and sales of investments	468,308	128,610	113,755
Contributions to deferred compensation plan, net	(6,853)	(16,492)	(2,542)
Purchases of intangible assets	0	0	(793)
Net cash used in investing activities	(178,726)	(12,510)	(378,886)
Cash flows from financing activities:
Property and equipment purchased on extended payment terms	(2,826)	(2,055)	(2,834)
Proceeds from common stock issued under the employee equity incentive plan	1,118	5,358	17,322
Proceeds from common stock issued under the employee stock purchase plan	7,568	5,877	4,670
Repurchase of common stock	(3,741)	0	0
Dividends and dividend equivalents paid	(185,844)	(137,965)	(109,364)
Net cash used in financing activities	(183,725)	(128,785)	(90,206)
Effect of change in exchange rates	(3,310)	(6,039)	3,400
Net increase (decrease) in cash, cash equivalents and restricted cash	272,452	99,340	(145,682)
Cash, cash equivalents and restricted cash, beginning of period	288,729	189,389	335,071
Cash, cash equivalents and restricted cash, end of period	561,181	288,729	189,389
Supplemental disclosures for cash flow information:
Cash paid for income taxes, net	85,128	85,031	21,148
Non-cash investing and financing activities:
Liability accrued for property and equipment purchases	1,784	5,743	17,877
Liability accrued for dividends and dividend equivalents	$ 53,213	$ 40,939	$ 33,059

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Significant Accounting Policies [Text Block]	1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Business Monolithic Power Systems, Inc. (the “Company”) was incorporated in the State of California on August 22, 1997. November 17, 2004, Basis of Presentation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation. 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 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 Certain Significant Risks and Uncertainties Financial instruments which potentially subject the Company to concentrations of credit risk consist primarily of cash equivalents, short-term and long-term investments and accounts receivable. The Company’s cash equivalents include short-term, highly liquid investments purchased with remaining maturities at the date of purchase of three may The Company does not may The Company participates in the dynamic high technology industry and believes that changes in any of the following areas could have a material adverse effect on its future financial position, results of operations or cash flows: advances and trends in new technologies and industry standards; competitive pressures in the form of new products or price reductions on current products; changes in product mix; changes in the overall demand for products offered by the Company or in specific markets; changes in third Foreign Currency In general, the functional currency of the Company’s international subsidiaries is the local currency. The primary subsidiaries are located in China, Taiwan and Europe, which utilize the Renminbi, the New Taiwan Dollar and the Euro as their currencies, respectively. Accordingly, assets and liabilities of the foreign subsidiaries are translated using exchange rates in effect at the end of the period. Revenue and costs are translated using average exchange rates for the period. The resulting translation adjustments are recorded in accumulated other comprehensive loss on the Consolidated Balance Sheets. In addition, the Company incurs foreign currency exchange gains or losses related to certain transactions, including intercompany transactions, that are denominated in a currency other than the functional currency. In connection with the remeasurement and settlement of the balances, the Company recorded foreign currency exchange gain (loss) of $(0.2) million, $0.5 million and $(0.7) million for the years ended December 31, 2023, 2022 2021 For intercompany transactions that are of a long-term investment nature, the Company records the foreign currency exchange gains and losses in accumulated other comprehensive loss on the Consolidated Balance Sheets. Cash Equivalents and Debt Investments The Company classifies all highly liquid investments with stated maturities of three may one Cash equivalents are stated at cost, which approximates fair market value. The Company’s short-term and long-term debt investments are classified as available-for-sale securities and are stated at their fair market value, with unrealized gains and losses recorded in accumulated other comprehensive loss on the Consolidated Balance Sheets. Premiums and discounts on debt investments are generally amortized or accreted over the life of the related available-for-sale securities. Interest income is recognized when earned. The cost of investments sold is determined on the basis of the specific identification method. Available-for-sale investments are subject to impairment reviews when the fair value is below the amortized cost basis. If the Company determines that the decline in fair value below the amortized cost basis is due to credit-related factors, the impairment is recognized as an allowance on the Consolidated Balance Sheets with a corresponding adjustment to earnings. An impairment that is not not Equity Investments Equity investments in privately held companies without readily determinable fair values are accounted for under the measurement alternative method, provided that the Company does not The Company monitors its non-marketable equity investments for impairment indicators, such as negative changes in industry and market conditions, financial performance, business prospects, and other relevant events and factors. If indicators exist for a security and the fair value is below the carrying amount, the Company writes down the security to fair value. Fair Value of Financial Instruments Fair value is defined as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value, the Company considers the principal or most advantageous market in which the Company would transact, as well as assumptions that market participants would use when pricing the assets or liabilities. Fair value is estimated by applying the fair value hierarchy, which prioritizes the inputs used to measure fair value into three 4 Inventories Inventories are stated at the lower of standard cost (which approximates actual cost determined on a first first may may not Property and Equipment Property and equipment are stated at cost. Depreciation commences when an asset is placed in service and available for its intended use. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. Buildings and building improvements have estimated useful lives of 20 to 40 years. Leasehold improvements are amortized over the shorter of the estimated useful lives or the lease period. Production equipment, lab equipment and software have estimated useful lives of three eight three five not Impairment of Long-Lived Assets The Company evaluates its long-lived assets other than goodwill for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not not Goodwill Goodwill represents the excess of the fair value of purchase consideration over the fair value of net tangible and identified intangible assets as of the date of acquisition. Goodwill is not The Company tests goodwill for impairment at least annually in the fourth may first not not No Deferred Compensation Plan The Company has a non-qualified, unfunded deferred compensation plan, which provides certain key employees, including executive officers, with the ability to defer the receipt of compensation in order to accumulate funds for retirement on a tax deferred basis. The Company does not The liabilities for compensation deferred under the plan are recorded at fair value as of the end of each reporting period. Changes in the fair value of the liabilities are included in operating expenses on the Consolidated Statements of Operations. The Company manages the risk of changes in the fair value of the liabilities by electing to match the liabilities with investments in corporate-owned life insurance policies, mutual funds and money market funds that offset a substantial portion of the exposure. The investments are recorded at the cash surrender value of the corporate-owned life insurance policies, and at the fair value of the mutual funds and money market funds, which are classified as trading securities. Changes in the cash surrender value of the corporate-owned life insurance policies and the fair value of mutual fund and money market fund investments are included in other income (expense), net, on the Consolidated Statements of Operations. The following table summarizes the deferred compensation plan balances on the Consolidated Balance Sheets (in thousands): December 31, 2023 2022 Deferred compensation plan asset components: Cash surrender value of corporate-owned life insurance policies $ 23,545 $ 19,089 Fair value of mutual funds and money market funds 54,836 43,933 Total $ 78,381 $ 63,022 Deferred compensation plan assets reported in: Other long-term assets $ 78,381 $ 63,022 Deferred compensation plan liabilities reported in: Accrued compensation and related benefits (short-term) $ 384 $ 118 Other long-term liabilities 80,903 64,863 Total $ 81,287 $ 64,981 Revenue Recognition The Company recognizes revenue when it transfers control of promised goods or services to its customers in an amount that reflects the consideration to which it expects to be entitled in exchange for those goods or services. See Note 2 R&D Costs incurred in R&D are expensed as incurred. Warranty Reserve The Company generally provides either a one two no not Leases The Company determines if an arrangement is a lease at inception. Lease terms may not The Company does not 12 For lease arrangements where the Company is the lessor, the Company recognizes lease income from operating leases on a straight-line basis over the lease term. Stock-Based Compensation The Company measures the cost of employee services received in exchange for an award of equity instruments based on the grant-date fair value of the award. The fair value of RSUs with only service conditions is determined based on the grant date stock price. The fair value of all other awards is determined based on the following valuation methods: Type of Awards Valuation Method RSUs with performance conditions (“PSUs”) that have a purchase price adjustment Monte Carlo simulation model RSUs with market conditions (“MSUs”) Monte Carlo simulation model RSUs with both performance and market conditions (“MPSUs”) Monte Carlo simulation model Shares issued under the employee stock purchase plan (“ESPP”) Black-Scholes model The valuation models consider inputs including stock price, expected volatility, expected term of awards, risk-free interest rate, and expected dividend yield. Expected volatility used in the models is determined based on historical volatility of the Company’s stock price for the period, which corresponds to the expected term of the awards, immediately preceding the granting of the awards. Compensation expense related to awards with service conditions is recorded on a straight-line basis over the requisite service period. Compensation expense related to awards subject to performance or market conditions is recognized over the requisite service period for each separately vesting tranche. For awards with only market conditions, compensation expense is not not not The Company accounts for forfeitures of equity awards when they occur. Accounting for Income Taxes The Company recognizes federal, state and foreign current tax liabilities or assets based on its estimate of taxes payable or refundable in the current fiscal year by tax jurisdiction. The Company also recognizes federal, state and foreign deferred tax assets or liabilities for its estimate of future tax effects attributable to temporary differences and carryforwards. The Company records a valuation allowance to reduce any deferred tax assets by the amount of any tax benefits that, based on available evidence and judgment, are not The Company’s calculation of current and deferred tax assets and liabilities is based on certain estimates and judgments and involves dealing with uncertainties in the application of complex tax laws. The Company’s estimates of current and deferred tax assets and liabilities may 50% may Litigation and Contingencies 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, may not Net Income per Share 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 Comprehensive Income Comprehensive income represents the change in the Company’s net assets during the period from non-owner sources. Accumulated other comprehensive loss presented on the Consolidated Balance Sheets primarily consists of unrealized gains or losses related to available-for-sale investments and foreign currency translation adjustments. Recently Adopted Accounting Pronouncement In October 2021, 2021 08, Business Combinations (Topic 805 606, Revenue from Contracts with Customers 2023 not December 31, 2023. not 17 New Accounting Pronouncements Not December 31, 2023 In November 2023, 2023 07, Segment Reporting (Topic 280 2024 first 2025, In December 2023, 2023 09, Income Taxes (Topic 740 2025. not

Note 2 - Revenue Recognition

Note 2 - Revenue Recognition	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	2. Revenue from Product Sales The Company generates revenue primarily from product sales, which include assembled and tested ICs, as well as dies in wafer form. These product sales accounted for 99%, 98% and 97% of the Company’s total revenue for the years ended December 31, 2023, 2022 2021 , third not 15 The Company sells its products primarily through third December 31, 2023, 2022 2021 , 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, revenue is not not 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 prices, 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. As of December 31, 2023 2022 , 30 90 not Contract Liabilities: For certain customers located in Asia, the Company requires cash payments two December 31, 2023 2022 December 31, 2023 December 31, 2023 December 31, 2022 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 - Cash, Cash Equivalents

Note 3 - Cash, Cash Equivalents, Investments and Restricted Cash	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Financial Instruments Disclosure [Text Block]	3. CASH, CASH EQUIVALENTS, INVESTMENTS AND RESTRICTED CASH The following is a summary of the Company’s cash, cash equivalents and debt investments (in thousands): December 31, 2023 2022 Cash $ 392,329 $ 273,145 Money market funds 135,514 15,462 Certificates of deposit 127,123 130,467 Corporate debt securities 95,101 292,586 Commercial paper - 17,928 U.S. treasuries and government agency bonds 358,409 8,285 Auction-rate securities backed by student-loan notes 567 1,711 Total $ 1,109,043 $ 739,584 December 31, 2023 2022 Reported as: Cash and cash equivalents $ 527,843 $ 288,607 Short-term investments 580,633 449,266 Investment within other long-term assets 567 1,711 Total $ 1,109,043 $ 739,584 The following table summarizes the contractual maturities of the short-term and long-term available-for-sale investments as of December 31, 2023 Amortized Cost Fair Value Due in less than 1 year $ 398,670 $ 397,884 Due in 1 - 5 years 183,266 182,749 Due in greater than 5 years 574 567 Total $ 582,510 $ 581,200 Gross realized gains and losses were not The following tables summarize the unrealized gain and loss positions related to the available-for sale investments (in thousands): 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 December 31, 2022 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Money market funds $ 15,462 $ - $ - $ 15,462 Certificates of deposit 130,467 - - 130,467 Corporate debt securities 300,529 18 (7,961 ) 292,586 Commercial paper 17,928 - - 17,928 U.S. treasuries and government agency bonds 8,487 - (202 ) 8,285 Auction-rate securities backed by student-loan notes 1,770 - (59 ) 1,711 Total $ 474,643 $ 18 $ (8,222 ) $ 466,439 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 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 ) December 31, 2022 Less than 12 Months Greater than 12 Months Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate debt securities $ 72,943 $ (973 ) $ 202,074 $ (6,988 ) $ 275,017 $ (7,961 ) U.S. treasuries and government agency bonds 987 (2 ) 7,298 (200 ) 8,285 (202 ) Auction-rate securities backed by student-loan notes - - 1,711 (59 ) 1,711 (59 ) Total $ 73,930 $ (975 ) $ 211,083 $ (7,247 ) $ 285,013 $ (8,222 ) An impairment exists when the fair value of an investment is less than its amortized cost basis. As of December 31, 2023 2022 not one not Non-Marketable Equity Investment In November 2020, April 2022, December 31, 2022, In May 2023, December 31, 2023 Restricted Cash The following table provides a reconciliation of cash, cash equivalents and restricted cash reported on the Consolidated Balance Sheets to the amounts reported on the Consolidated Statements of Cash Flows (in thousands): December 31, 2023 2022 Cash and cash equivalents $ 527,843 $ 288,607 Restricted cash included in other current assets 33,204 - Restricted cash included in other long-term assets 134 122 Total cash, cash equivalents and restricted cash reported on the Consolidated Statements of Cash Flows $ 561,181 $ 288,729 As of December 31, 2023 17 December 31, 2023 2022

Note 4 - Fair Value Measurement

Note 4 - Fair Value Measurements	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Fair Value Disclosures [Text Block]	4. 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 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 December 31, 2022 Total Level 1 Level 2 Level 3 Money market funds $ 15,462 $ 15,462 $ - $ - Certificates of deposit 130,467 - 130,467 - Corporate debt securities 292,586 - 292,586 - Commercial paper 17,928 - 17,928 - U.S. treasuries and government agency bonds 8,285 - 8,285 - Auction-rate securities backed by student-loan notes 1,711 - - 1,711 Mutual funds and money market funds under deferred compensation plan 43,933 43,933 - - Total $ 510,372 $ 59,395 $ 449,266 $ 1,711 Redemptions and changes in the fair value of the auction-rate securities classified as Level 3 not

Note 5 - Balance Sheet Componen

Note 5 - Balance Sheet Components	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Supplemental Balance Sheet Disclosures [Text Block]	5. Inventories Inventories consist of the following (in thousands): December 31, 2023 2022 Raw materials $ 118,917 $ 126,760 Work in process 112,750 134,071 Finished goods 152,035 186,459 Total $ 383,702 $ 447,290 Other Current Assets Other current assets consist of the following (in thousands): December 31, 2023 2022 Other receivables $ 50,000 $ - RSU tax withholding proceeds receivable 20,141 14,480 Prepaid expenses 28,964 11,045 Restricted cash 33,204 - Other 15,154 17,217 Total $ 147,463 $ 42,742 Other receivables relate to a deposit made to a supplier under a long-term wafer supply agreement. See Note 12 Property and Equipment, Net Property and equipment, net, consist of the following (in thousands): December 31, 2023 2022 Land $ 48,490 $ 41,924 Production equipment and software 270,390 254,882 Buildings and improvements 205,132 195,205 Transportation equipment 28,641 28,612 Leasehold improvements 17,052 17,389 Furniture and fixtures 11,711 11,378 Construction in progress 16,980 1,908 Property and equipment, gross 598,396 551,298 Less: accumulated depreciation and amortization (229,444 ) (194,141 ) Total $ 368,952 $ 357,157 Depreciation and amortization expense on property and equipment was $40.0 million, $36.8 million and $28.4 million for the years ended December 31, 2023, 2022 2021 Other Long-Term Assets Other long-term assets consist of the following (in thousands): December 31, 2023 2022 Deferred compensation plan assets $ 78,381 $ 63,022 Prepaid wafer purchases 120,000 170,000 Other 12,896 16,264 Total $ 211,277 $ 249,286 Prepaid wafer purchases relate to a deposit made to a supplier under a long-term wafer supply agreement. See Note 12 Other Accrued Liabilities Other accrued liabilities consist of the following (in thousands): December 31, 2023 2022 Dividends and dividend equivalents $ 57,697 $ 42,170 Warranty 16,906 24,082 Stock rotation and sales returns 18,843 14,931 Income tax payable 8,063 15,595 Other 14,282 16,901 Total $ 115,791 $ 113,679 Other Long-Term Liabilities Other long-term liabilities consist of the following (in thousands): December 31, 2023 2022 Deferred compensation plan liabilities $ 80,903 $ 64,863 Dividend equivalents 2,187 6,847 Operating lease liabilities 5,565 1,664 Total $ 88,655 $ 73,374

Note 6 - Leases

Note 6 - Leases	12 Months Ended
	Dec. 31, 2023
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 seven five not The following table summarizes the balances of operating lease ROU assets and liabilities (in thousands): December 31, Financial Statement Line Item 2023 2022 Operating lease ROU assets Other long-term assets $ 8,355 $ 4,288 Operating lease liabilities Other accrued liabilities $ 2,303 $ 2,133 Other long-term liabilities $ 5,565 $ 1,664 The following tables summarize certain information related to the leases (in thousands, except percentages and years): Year Ended December 31, 2023 2022 2021 Lease costs: Operating lease costs $ 3,113 $ 2,704 $ 2,454 Other 2,120 1,769 740 Total lease costs $ 5,233 $ 4,473 $ 3,194 Year Ended December 31, 2023 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 2,954 $ 2,762 $ 2,315 ROU assets obtained in exchange for new operating lease liabilities $ 7,081 $ 1,175 $ 5,195 December 31, 2023 2022 Weighted-average remaining lease term (in years) 4.7 2.1 Weighted-average discount rate 4.3 % 2.1 % As of December 31, 2023 2024 $ 2,583 2025 1,909 2026 1,230 2027 1,238 Thereafter 1,653 Total remaining lease payments 8,613 Less: imputed interest (745 ) Total lease liabilities $ 7,868 As of December 31, 2023 not not Lessor The Company owns certain office buildings and leases a portion of these properties to third one three five Income related to lease payments was $1.5 million, $2.4 million and $2.2 million for the years ended December 31, 2023, 2022 2021 December 31, 2023 , 2024 $ 760 2025 235 2026 41 Total $ 1,036

Note 7 - Stock-based Compensati

Note 7 - Stock-based Compensation	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Share-Based Payment Arrangement [Text Block]	7. STOCK-BASED COMPENSATION 2014 Equity Incentive Plan 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 . December 31, 2023 2014 Stock-Based Compensation Expense The Company recognized stock-based compensation expense as follows (in thousands): Year Ended December 31, 2023 2022 2021 Cost of revenue $ 4,545 $ 4,721 $ 3,543 Research and development 36,611 35,355 26,030 Selling, general and administrative 108,555 120,916 93,906 Total stock-based compensation expense $ 149,711 $ 160,992 $ 123,479 Tax benefit related to stock-based compensation (1) $ 2,519 $ 2,498 $ 1,760 ( 1 162 RSUs The Company’s RSUs include time-based RSUs, PSUs, MSUs, and 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 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 Number of Shares Weighted-Average Grant Date Fair Value Per Share Number of Shares Weighted-Average Grant Date Fair Value Per Share Number of Shares Weighted-Average Grant Date Fair Value Per Share Number of Shares Weighted-Average Grant Date Fair Value Per Share Outstanding at January 1, 2021 161 $ 151.62 1,390 $ 132.60 1,554 $ 40.40 3,105 $ 87.42 Granted 46 $ 384.33 365 (1) $ 354.12 - $ - 411 $ 357.49 Vested (71 ) $ 144.46 (577 ) $ 91.50 (324 ) $ 23.57 (972 ) $ 72.69 Forfeited (11 ) $ 207.04 (12 ) $ 103.84 (12 ) $ 68.48 (35 ) $ 124.50 Outstanding at December 31, 2021 125 $ 235.82 1,166 $ 222.78 1,218 $ 44.59 2,509 $ 136.87 Granted 49 $ 390.89 35 (1)(2) $ 385.80 917 $ 199.63 1,001 $ 215.63 Vested (61 ) $ 193.18 (452 ) $ 147.78 (324 ) $ 23.57 (837 ) $ 103.02 Forfeited (7 ) $ 316.00 (1 ) $ 377.86 (6 ) $ 216.37 (14 ) $ 275.47 Outstanding at December 31, 2022 106 $ 327.13 748 $ 275.70 1,805 $ 126.57 2,659 $ 176.50 Granted 51 $ 472.38 281 (1) $ 449.38 31 $ 330.95 363 $ 444.86 Vested (49 ) $ 296.65 (543 ) $ 257.24 (319 ) $ 23.57 (911 ) $ 177.54 Forfeited (6 ) $ 387.61 (4 ) $ 315.19 (15 ) $ 110.65 (25 ) $ 209.23 Outstanding at December 31, 2023 102 $ 411.11 482 $ 397.77 1,502 $ 152.89 2,086 $ 222.04 ( 1 Amount reflects the number of awards that may ( 2 Amount included grants and cancellations of the 2022 “2022 The intrinsic value related to vested RSUs was $461.3 million, $336.8 million and $381.2 million for the years ended December 31, 2023, 2022 2021 December 31, 2023 December 31, 2023 two Cash proceeds from vested PSUs with a purchase price totaled $1.1 million, $5.4 million and $17.3 million for the years ended December 31, 2023, 2022 2021, Time-Based RSUs For the years ended December 31, 2023, 2022 2021 four one PSUs and MPSUs 2023 In February 2023, two “2023 first 2023 three 2023 2025 three second 2023 three 2023 December 31, 2025, 2023 In February 2023, 2024 two 2023 2024 two “2023 2023 2023 first 2025 2023 two 2023 The 2023 2023 $30 $30 2023 2023 no not 2022 In February 2022, two “2022 first 2022 two 2022 2023 two 2022 first 2024 2022 two second 2022 three 2022 second first 2025 second one 2022 2022 October 2022. “2022 In February 2022, 2023 two 2022 2023 two “2022 2022 2022 first 2024. 2022 two 2022 The 2022 2022 $30 20 2022 2023 $30 first 2022. 2022 first 2022 four 2022 second 2021 In February 2021, two “2021 first 2021 two 2021 2022 two 2021 first 2023. 2021 two second 100% 2021 three December 31, 2023. December 31, 2023, three 2021 one 2021 In February 2021, 2022 two 2021 2022 two “2021 2021 2021 first 2023. 2021 two 2021 The 2021 2021 $30 20 December 31, 2022 $30 third 2021. 2021 2021 4.0 2021 2020 In February 2020 , two 2020 2021 two “2020 2020 2020 first 2022. 2020 two 2020 In February 2020 , 2021 two 2020 2021 two “2020 2020 2020 first 2022. 2020 two 2020 The 2020 2020 $30 20 $30 second 2020. 2020 2020 2020 MPSUs: In July 2020 , “2020 2020 five July 20, 2023 , one December 31, 2021 . December 31, 2020, five 2020 July 20, 2023, 2020 July 20, 2024 . one 2020 The Company determined the grant date fair value of the 2020 MSUs 2022 In October 2022, 2022 three October 25, 2022 October 25, 2025 ( “2022 2022 1 five 2 50 th December 31, 2023, one two 2022 October 25, 2025. 2022 2022 The Company determined the grant date fair value of the 2022 three no not In February 2022, “2022 2022 five February 3, 2022 February 3, 2025. December 31, 2023, 2022 second third February 3, 2025. 2022 The Company determined the grant date fair value of the 2022 six 2018 In October 2018, “2018 2018 five October 26, 2018 December 31, 2023. December 31, 2019, 2018 January 1, 2024, two 2018 The Company determined the grant date fair value of the 2018 2013 In December 2013, “2013 2013 five January 1, 2014 December 31, 2018. December 31, 2015, 2013 January 1, 2019 December 31, 2023. 2013 The Company determined the grant date fair value of the 2013 not ESPP In April 2023, 2004 2004 2004 June 15, 2023, August 16, 2023, 2004 “2004 2004 one million first 2004 2004 August 16, 2038. Under both ESPPs, eligible employees may may not six December 31, 2023, 2004 For the years ended December 31, 2023, 2022 2021 2004 2004 December 31, 2023, 2022 2021 December 31, 2023 first 2024. Year Ended December 31, 2023 2022 2021 Expected term (in years) 0.5 0.5 0.5 Expected volatility 53.3 % 50.6 % 43.2 % Risk-free interest rate 5.3 % 1.9 % 0.1 % Dividend yield 0.8 % 0.6 % 0.6 % Cash proceeds from the shares issued under the 2004 2004 December 31, 2023, 2022 2021

Note 8 - Stockholders' Equity

Note 8 - Stockholders' Equity	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Equity [Text Block]	8. 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): Year Ended December 31, 2023 2022 2021 Dividend declared per share $ 4.00 $ 3.00 $ 2.40 Total amount $ 190,642 $ 140,337 $ 110,206 As of December 31, 2023 2022 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 December 31, 2023 2022 , Stock Repurchase Program In October 2023, October 29, 2026. December 31, 2023. Stock repurchased under the program may not may The U.S. IRA requires a 1% December 31, 2022. not

Note 9 - Other Income (Expense)

Note 9 - Other Income (Expense), Net	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Other Nonoperating Income and Expense [Text Block]	9. The components of other income (expense), net, are as follows (in thousands): Year Ended December 31, 2023 2022 2021 Interest income $ 23,363 $ 14,369 $ 11,637 Amortization of discount (premium) on available-for-sale securities, net 5,277 (4,375 ) (4,674 ) Gain (loss) on deferred compensation plan investments 8,505 (6,600 ) 4,563 Charitable contributions (14,850 ) (5,900 ) (1,500 ) Gain on sale of equity investment 1,424 - - Other 386 658 (224 ) Total $ 24,105 $ (1,848 ) $ 9,802

Note 10 - Net Income Per Share

Note 10 - Net Income Per Share	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Earnings Per Share [Text Block]	10. NET INCOME PER SHARE The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share amounts): Year Ended December 31, 2023 2022 2021 Numerator: Net income $ 427,374 $ 437,672 $ 242,023 Denominator: Weighted-average outstanding shares - basic 47,610 46,727 45,851 Effect of dilutive securities 1,161 1,631 2,038 Weighted-average outstanding shares - diluted 48,771 48,358 47,889 Net income per share: Basic $ 8.98 $ 9.37 $ 5.28 Diluted $ 8.76 $ 9.05 $ 5.05 Anti-dilutive common stock equivalents were not

Note 11 - Income Taxes

Note 11 - Income Taxes	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Income Tax Disclosure [Text Block]	11. INCOME TAXES The components of income before income taxes are as follows (in thousands): Year Ended December 31, 2023 2022 2021 United States $ (15,066 ) $ (30,190 ) $ (15,542 ) Foreign 520,907 555,127 287,761 Income before income taxes $ 505,841 $ 524,937 $ 272,219 The components of the income tax expense are as follows (in thousands): Year Ended December 31, 2023 2022 2021 Current: Federal $ 61,064 $ 95,176 $ 24,955 State 4,257 12 35 Foreign 5,702 5,019 3,801 Deferred: Federal (1,705 ) (8,523 ) 4,929 State (744 ) - - Foreign 9,893 (4,419 ) (3,524 ) Income tax expense $ 78,467 $ 87,265 $ 30,196 The effective tax rate differs from the applicable U.S. statutory federal income tax rate as follows: Year Ended December 31, 2023 2022 2021 U.S. statutory federal tax rate 21.0 % 21.0 % 21.0 % Foreign income at lower rates (21.9 ) (22.8 ) (23.2 ) GILTI 13.5 16.0 11.4 Changes in valuation allowance 2.9 0.2 0.5 Stock-based compensation 2.2 2.8 1.6 Return to provision true-up adjustment (2.0 ) - (1.1 ) Tax credits, net of reserves (1.1 ) (1.2 ) (0.5 ) State income taxes - (0.2 ) 1.6 Other adjustments 0.9 0.8 (0.2 ) Effective tax rate 15.5 % 16.6 % 11.1 % The prior years’ return to provision true-up adjustment has been disaggregated to conform with the current-year presentation. The components of net deferred tax assets consist of the following (in thousands): December 31, 2023 2022 Deferred tax assets: Tax credits $ 37,518 $ 32,037 Stock-based compensation 3,404 2,900 Deferred compensation 11,126 9,844 Net operating losses 12,115 9,000 Other expenses not currently deductible 7,755 8,891 Deferred tax assets, gross 71,918 62,672 Valuation allowance (35,008 ) (20,321 ) Deferred tax assets, net of valuation allowance 36,910 42,351 Deferred tax liabilities: Depreciation and amortization (6,420 ) (5,927 ) Undistributed foreign earnings (817 ) (358 ) Other expenses currently deductible (1,619 ) (814 ) Deferred tax liabilities (8,856 ) (7,099 ) Net deferred tax assets $ 28,054 $ 35,252 GILTI: The Company accounts for GILTI as a period cost. Valuation Allowance: The Company periodically evaluates its deferred tax assets, including a determination of whether a valuation allowance is necessary, based upon its ability to utilize the assets using a more likely than not December 31, 2023 2022 not not A reconciliation of the beginning and ending balance of valuation allowances is as follows (in thousands): Period Balance at Beginning of Period Additions Reductions Balance at End of Period Year ended December 31, 2021 $ 18,190 $ 1,560 $ (230 ) $ 19,520 Year ended December 31, 2022 $ 19,520 $ 1,743 $ (942 ) $ 20,321 Year ended December 31, 2023 $ 20,321 $ 15,405 $ (718 ) $ 35,008 The additions in 2023 2023 Undistributed Earnings of Subsidiaries: The Company has analyzed its global working capital and cash requirements, and has determined that it plans to repatriate cash from its Bermuda subsidiary on an ongoing basis to fund its future U.S.-based expenditures and dividends. For the years ended December 31, 2023 2021, December 31, 2022. For all other foreign subsidiaries, the Company expects to indefinitely reinvest undistributed earnings to fund their operations and R&D. As of December 31, 2023 2022 not Other Income Tax Provision Matters As of December 31, 2023 not December 31, 2023 2029. December 31, 2023 2029. As of December 31, 2023 In the event of a change in ownership, as defined under federal and state tax laws, the Company’s net operating loss and tax credit carryforwards could be subject to annual limitations. The annual limitations could result in the expiration of the net operating loss and tax credit carryforwards prior to utilization.   As of December 31, 2023 December 31, 2022 A reconciliation of the gross unrecognized tax benefits is as follows (in thousands): Balance as of January 1, 2021 $ 33,499 Increase for tax position of current year 9,191 Decrease for tax position of prior year (657 ) Decrease due to settlement with tax authorities (54 ) Decrease due to lapse of statute of limitation (458 ) Balance as of December 31, 2021 41,521 Increase for tax position of current year 10,965 Increase for tax position of prior year 247 Decrease due to settlement with tax authorities (970 ) Decrease due to lapse of statute of limitation (2,486 ) Balance as of December 31, 2022 49,277 Increase for tax position of current year 14,108 Increase for tax position of prior year 2,209 Decrease due to lapse of statute of limitation (1,926 ) Decrease for tax positions of prior year (1,008 ) Balance as of December 31, 2023 $ 62,660 The Company recognizes interest and penalties, if any, related to uncertain tax positions in its income tax provision. As of December 31, 2023 2022   Uncertain tax positions relate to the allocation of income and deductions among the Company’s global entities and to the determination of the R&D tax credit. It is reasonably possible that the balance of gross unrecognized tax benefits could significantly change in the next 12 not   The Company currently has reduced tax rates in its subsidiaries in Chengdu and Hangzhou, China through 2026 2024, On December 27, 2023, 15% €750M 2025. September 30, 2023. not January 1, 2025, not not December 31, 2023 On August 9, 2022, August 16, 2022, 15% 1% January 1, 2023. no December 31, 2023 2022. Income Tax Examination The Company is subject to examination of its income tax returns by the IRS and other tax authorities. In general, the tax years for 2007

Note 12 - Commitments and Conti

Note 12 - Commitments and Contingencies	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	12. COMMITMENTS AND CONTINGENCIES Warranty and Indemnification Provisions The changes in warranty reserves are as follows (in thousands): Year Ended December 31, 2023 2022 2021 Balance at beginning of period $ 24,082 $ 20,989 $ 6,895 Warranties issued 2,929 3,092 10,558 Repairs, replacement and refund (2,708 ) (2,357 ) (1,770 ) Changes in liability for pre-existing warranties (7,397 ) 2,358 5,306 Balance at end of period $ 16,906 $ 24,082 $ 20,989 Changes in liability for pre-existing warranties result from changes in estimates for warranties issued in prior periods. The Company provides indemnification agreements to certain direct or indirect customers. The Company agrees to reimburse these parties for any damages, costs and expenses incurred by them as a result of legal actions taken against them by third It is not no no not 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 December 31, 2023 Total estimated future unconditional purchase commitments to all suppliers and other parties, net of the $120.0 December 31, 2023 2024 $ 367,842 2025 298,958 2026 1,668 2027 31,266 Total $ 699,734 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 December 31, 2023 , no

Note 13 - Employee 401(k) Plan

Note 13 - Employee 401(k) Plan	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Retirement Benefits [Text Block]	13. EMPLOYEE 401 The Company sponsors a 401 may not not December 31, 2023, 2022 2021

Note 14 - Significant Customers

Note 14 - Significant Customers	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	14. SIGNIFICANT CUSTOMERS The Company sells its products primarily through third 10% Year Ended December 31, Customer 2023 2022 2021 Distributor A 26 % 24 % 26 % Distributor B 19 % 19 % 15 % Distributor C 10 % * 10 % * Represents less than 10%. The Company’s agreements with these third may may not The following table summarizes those customers with accounts receivable equal to 10% December 31, Customer 2023 2022 Distributor A 42 % 29 % Distributor B 13 % 23 % Distributor C 10 % * * Represents less than 10%.

Note 15 - Segment and Geographi

Note 15 - Segment and Geographic Information	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	15. SEGMENT AND GEOGRAPHIC INFORMATION The Company operates in one The following is a summary of revenue by geographic region (in thousands): Year Ended December 31, Country or Region 2023 2022 2021 China $ 934,768 $ 938,946 $ 700,985 Taiwan 307,499 233,040 169,130 South Korea 169,867 189,478 93,027 Europe 132,620 145,584 85,201 United States 97,294 99,804 35,770 Japan 93,340 91,048 68,720 Southeast Asia 85,150 95,739 54,611 Other 534 509 354 Total $ 1,821,072 $ 1,794,148 $ 1,207,798 The following is a summary of revenue by major product family (in thousands): Year Ended December 31, Product Family 2023 2022 2021 DC to DC $ 1,718,623 $ 1,696,594 $ 1,147,329 Lighting Control 102,449 97,554 60,469 Total $ 1,821,072 $ 1,794,148 $ 1,207,798 The following is a summary of long-lived assets by geographic region (in thousands): December 31, Country 2023 2022 2021 China $ 184,685 $ 200,508 $ 211,973 United States 119,430 113,996 113,805 Taiwan 39,419 20,074 19,607 Other 25,418 22,579 17,577 Total $ 368,952 $ 357,157 $ 362,962

Note 16 - Accumulated Other Com

Note 16 - Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Comprehensive Income (Loss) Note [Text Block]	16. The following table summarizes the changes in accumulated other comprehensive income (loss) (in thousands): Unrealized Losses on Available-for-Sale Securities Foreign Currency Translation Adjustments Total Balance as of January 1, 2022 $ (1,063 ) $ 16,943 $ 15,880 Other comprehensive loss before reclassifications (6,944 ) (32,293 ) (39,237 ) Amounts reclassified from accumulated other comprehensive loss 96 - 96 Tax effect 184 - 184 Net current period other comprehensive loss (6,664 ) (32,293 ) (38,957 ) Balance as of December 31, 2022 (7,727 ) (15,350 ) (23,077 ) Other comprehensive income (loss) before reclassifications 6,896 (9,528 ) (2,632 ) Amounts reclassified from accumulated other comprehensive income (1 ) - (1 ) Tax effect (1,352 ) - (1,352 ) Net current period other comprehensive income (loss) 5,543 (9,528 ) (3,985 ) Balance as of December 31, 2023 $ (2,184 ) $ (24,878 ) $ (27,062 ) The amounts reclassified from accumulated other comprehensive income (loss) were recorded in other income (expense), net, on the Consolidated Statements of Operations.

Note 17 - Subsequent Events

Note 17 - Subsequent Events	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Subsequent Events [Text Block]	17. Acquisition In January 2024, 10 Cash Dividend Increase In February 2024

Insider Trading Arrangements

Insider Trading Arrangements	12 Months Ended
	Dec. 31, 2023
Insider Trading Arr Line Items
Material Terms of Trading Arrangement [Text Block]	9B. Other Information 10b5 1 Certain of our executive officers have entered into trading plans pursuant to Rule 10b5 1 1934, 2004 2004 three December 31, 2023 no 10b5 1 408 three December 31, 2023, 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)	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Basis of Presentation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation.
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 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
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Certain Significant Risks and Uncertainties Financial instruments which potentially subject the Company to concentrations of credit risk consist primarily of cash equivalents, short-term and long-term investments and accounts receivable. The Company’s cash equivalents include short-term, highly liquid investments purchased with remaining maturities at the date of purchase of three may The Company does not may The Company participates in the dynamic high technology industry and believes that changes in any of the following areas could have a material adverse effect on its future financial position, results of operations or cash flows: advances and trends in new technologies and industry standards; competitive pressures in the form of new products or price reductions on current products; changes in product mix; changes in the overall demand for products offered by the Company or in specific markets; changes in third
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Foreign Currency In general, the functional currency of the Company’s international subsidiaries is the local currency. The primary subsidiaries are located in China, Taiwan and Europe, which utilize the Renminbi, the New Taiwan Dollar and the Euro as their currencies, respectively. Accordingly, assets and liabilities of the foreign subsidiaries are translated using exchange rates in effect at the end of the period. Revenue and costs are translated using average exchange rates for the period. The resulting translation adjustments are recorded in accumulated other comprehensive loss on the Consolidated Balance Sheets. In addition, the Company incurs foreign currency exchange gains or losses related to certain transactions, including intercompany transactions, that are denominated in a currency other than the functional currency. In connection with the remeasurement and settlement of the balances, the Company recorded foreign currency exchange gain (loss) of $(0.2) million, $0.5 million and $(0.7) million for the years ended December 31, 2023, 2022 2021 For intercompany transactions that are of a long-term investment nature, the Company records the foreign currency exchange gains and losses in accumulated other comprehensive loss on the Consolidated Balance Sheets.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash Equivalents and Debt Investments The Company classifies all highly liquid investments with stated maturities of three may one Cash equivalents are stated at cost, which approximates fair market value. The Company’s short-term and long-term debt investments are classified as available-for-sale securities and are stated at their fair market value, with unrealized gains and losses recorded in accumulated other comprehensive loss on the Consolidated Balance Sheets. Premiums and discounts on debt investments are generally amortized or accreted over the life of the related available-for-sale securities. Interest income is recognized when earned. The cost of investments sold is determined on the basis of the specific identification method. Available-for-sale investments are subject to impairment reviews when the fair value is below the amortized cost basis. If the Company determines that the decline in fair value below the amortized cost basis is due to credit-related factors, the impairment is recognized as an allowance on the Consolidated Balance Sheets with a corresponding adjustment to earnings. An impairment that is not not
Equity Securities without Readily Determinable Fair Value [Policy Text Block]	Equity Investments Equity investments in privately held companies without readily determinable fair values are accounted for under the measurement alternative method, provided that the Company does not The Company monitors its non-marketable equity investments for impairment indicators, such as negative changes in industry and market conditions, financial performance, business prospects, and other relevant events and factors. If indicators exist for a security and the fair value is below the carrying amount, the Company writes down the security to fair value.
Fair Value of Financial Instruments, Policy [Policy Text Block]	Fair Value of Financial Instruments Fair value is defined as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value, the Company considers the principal or most advantageous market in which the Company would transact, as well as assumptions that market participants would use when pricing the assets or liabilities. Fair value is estimated by applying the fair value hierarchy, which prioritizes the inputs used to measure fair value into three 4
Inventory, Policy [Policy Text Block]	Inventories Inventories are stated at the lower of standard cost (which approximates actual cost determined on a first first may may not
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment Property and equipment are stated at cost. Depreciation commences when an asset is placed in service and available for its intended use. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. Buildings and building improvements have estimated useful lives of 20 to 40 years. Leasehold improvements are amortized over the shorter of the estimated useful lives or the lease period. Production equipment, lab equipment and software have estimated useful lives of three eight three five not
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Impairment of Long-Lived Assets The Company evaluates its long-lived assets other than goodwill for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not not
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]	Goodwill Goodwill represents the excess of the fair value of purchase consideration over the fair value of net tangible and identified intangible assets as of the date of acquisition. Goodwill is not The Company tests goodwill for impairment at least annually in the fourth may first not not No
Deferred Compensation Plan, Policy [Policy Text Block]	Deferred Compensation Plan The Company has a non-qualified, unfunded deferred compensation plan, which provides certain key employees, including executive officers, with the ability to defer the receipt of compensation in order to accumulate funds for retirement on a tax deferred basis. The Company does not The liabilities for compensation deferred under the plan are recorded at fair value as of the end of each reporting period. Changes in the fair value of the liabilities are included in operating expenses on the Consolidated Statements of Operations. The Company manages the risk of changes in the fair value of the liabilities by electing to match the liabilities with investments in corporate-owned life insurance policies, mutual funds and money market funds that offset a substantial portion of the exposure. The investments are recorded at the cash surrender value of the corporate-owned life insurance policies, and at the fair value of the mutual funds and money market funds, which are classified as trading securities. Changes in the cash surrender value of the corporate-owned life insurance policies and the fair value of mutual fund and money market fund investments are included in other income (expense), net, on the Consolidated Statements of Operations. The following table summarizes the deferred compensation plan balances on the Consolidated Balance Sheets (in thousands): December 31, 2023 2022 Deferred compensation plan asset components: Cash surrender value of corporate-owned life insurance policies $ 23,545 $ 19,089 Fair value of mutual funds and money market funds 54,836 43,933 Total $ 78,381 $ 63,022 Deferred compensation plan assets reported in: Other long-term assets $ 78,381 $ 63,022 Deferred compensation plan liabilities reported in: Accrued compensation and related benefits (short-term) $ 384 $ 118 Other long-term liabilities 80,903 64,863 Total $ 81,287 $ 64,981
Revenue from Contract with Customer [Policy Text Block]	Revenue Recognition The Company recognizes revenue when it transfers control of promised goods or services to its customers in an amount that reflects the consideration to which it expects to be entitled in exchange for those goods or services. See Note 2
Research and Development Expense, Policy [Policy Text Block]	R&D Costs incurred in R&D are expensed as incurred.
Standard Product Warranty, Policy [Policy Text Block]	Warranty Reserve The Company generally provides either a one two no not
Lessee, Leases [Policy Text Block]	Leases The Company determines if an arrangement is a lease at inception. Lease terms may not The Company does not 12 For lease arrangements where the Company is the lessor, the Company recognizes lease income from operating leases on a straight-line basis over the lease term.
Share-Based Payment Arrangement [Policy Text Block]	Stock-Based Compensation The Company measures the cost of employee services received in exchange for an award of equity instruments based on the grant-date fair value of the award. The fair value of RSUs with only service conditions is determined based on the grant date stock price. The fair value of all other awards is determined based on the following valuation methods: Type of Awards Valuation Method RSUs with performance conditions (“PSUs”) that have a purchase price adjustment Monte Carlo simulation model RSUs with market conditions (“MSUs”) Monte Carlo simulation model RSUs with both performance and market conditions (“MPSUs”) Monte Carlo simulation model Shares issued under the employee stock purchase plan (“ESPP”) Black-Scholes model The valuation models consider inputs including stock price, expected volatility, expected term of awards, risk-free interest rate, and expected dividend yield. Expected volatility used in the models is determined based on historical volatility of the Company’s stock price for the period, which corresponds to the expected term of the awards, immediately preceding the granting of the awards. Compensation expense related to awards with service conditions is recorded on a straight-line basis over the requisite service period. Compensation expense related to awards subject to performance or market conditions is recognized over the requisite service period for each separately vesting tranche. For awards with only market conditions, compensation expense is not not not The Company accounts for forfeitures of equity awards when they occur.
Income Tax, Policy [Policy Text Block]	Accounting for Income Taxes The Company recognizes federal, state and foreign current tax liabilities or assets based on its estimate of taxes payable or refundable in the current fiscal year by tax jurisdiction. The Company also recognizes federal, state and foreign deferred tax assets or liabilities for its estimate of future tax effects attributable to temporary differences and carryforwards. The Company records a valuation allowance to reduce any deferred tax assets by the amount of any tax benefits that, based on available evidence and judgment, are not The Company’s calculation of current and deferred tax assets and liabilities is based on certain estimates and judgments and involves dealing with uncertainties in the application of complex tax laws. The Company’s estimates of current and deferred tax assets and liabilities may 50% may
Litigation and Contingencies, Policy [Policy Text Block]	Litigation and Contingencies 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, may not
Earnings Per Share, Policy [Policy Text Block]	Net Income per Share 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
Comprehensive Income, Policy [Policy Text Block]	Comprehensive Income Comprehensive income represents the change in the Company’s net assets during the period from non-owner sources. Accumulated other comprehensive loss presented on the Consolidated Balance Sheets primarily consists of unrealized gains or losses related to available-for-sale investments and foreign currency translation adjustments.
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Adopted Accounting Pronouncement In October 2021, 2021 08, Business Combinations (Topic 805 606, Revenue from Contracts with Customers 2023 not December 31, 2023. not 17 New Accounting Pronouncements Not December 31, 2023 In November 2023, 2023 07, Segment Reporting (Topic 280 2024 first 2025, In December 2023, 2023 09, Income Taxes (Topic 740 2025. not

Note 1 - Summary of Significa_2

Note 1 - Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Deferred Compensation Plan [Table Text Block]	December 31, 2023 2022 Deferred compensation plan asset components: Cash surrender value of corporate-owned life insurance policies $ 23,545 $ 19,089 Fair value of mutual funds and money market funds 54,836 43,933 Total $ 78,381 $ 63,022 Deferred compensation plan assets reported in: Other long-term assets $ 78,381 $ 63,022 Deferred compensation plan liabilities reported in: Accrued compensation and related benefits (short-term) $ 384 $ 118 Other long-term liabilities 80,903 64,863 Total $ 81,287 $ 64,981

Note 3 - Cash, Cash Equivalen_2

Note 3 - Cash, Cash Equivalents, Investments and Restricted Cash (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Fair Value, by Balance Sheet Grouping [Table Text Block]	December 31, 2023 2022 Cash $ 392,329 $ 273,145 Money market funds 135,514 15,462 Certificates of deposit 127,123 130,467 Corporate debt securities 95,101 292,586 Commercial paper - 17,928 U.S. treasuries and government agency bonds 358,409 8,285 Auction-rate securities backed by student-loan notes 567 1,711 Total $ 1,109,043 $ 739,584 December 31, 2023 2022 Reported as: Cash and cash equivalents $ 527,843 $ 288,607 Short-term investments 580,633 449,266 Investment within other long-term assets 567 1,711 Total $ 1,109,043 $ 739,584
Investments Classified by Contractual Maturity Date [Table Text Block]	Amortized Cost Fair Value Due in less than 1 year $ 398,670 $ 397,884 Due in 1 - 5 years 183,266 182,749 Due in greater than 5 years 574 567 Total $ 582,510 $ 581,200
Unrealized Gain (Loss) on Investments [Table Text Block]	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 December 31, 2022 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Money market funds $ 15,462 $ - $ - $ 15,462 Certificates of deposit 130,467 - - 130,467 Corporate debt securities 300,529 18 (7,961 ) 292,586 Commercial paper 17,928 - - 17,928 U.S. treasuries and government agency bonds 8,487 - (202 ) 8,285 Auction-rate securities backed by student-loan notes 1,770 - (59 ) 1,711 Total $ 474,643 $ 18 $ (8,222 ) $ 466,439
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]	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 ) December 31, 2022 Less than 12 Months Greater than 12 Months Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate debt securities $ 72,943 $ (973 ) $ 202,074 $ (6,988 ) $ 275,017 $ (7,961 ) U.S. treasuries and government agency bonds 987 (2 ) 7,298 (200 ) 8,285 (202 ) Auction-rate securities backed by student-loan notes - - 1,711 (59 ) 1,711 (59 ) Total $ 73,930 $ (975 ) $ 211,083 $ (7,247 ) $ 285,013 $ (8,222 )
Restrictions on Cash and Cash Equivalents [Table Text Block]	December 31, 2023 2022 Cash and cash equivalents $ 527,843 $ 288,607 Restricted cash included in other current assets 33,204 - Restricted cash included in other long-term assets 134 122 Total cash, cash equivalents and restricted cash reported on the Consolidated Statements of Cash Flows $ 561,181 $ 288,729

Note 4 - Fair Value Measureme_2

Note 4 - Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	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 December 31, 2022 Total Level 1 Level 2 Level 3 Money market funds $ 15,462 $ 15,462 $ - $ - Certificates of deposit 130,467 - 130,467 - Corporate debt securities 292,586 - 292,586 - Commercial paper 17,928 - 17,928 - U.S. treasuries and government agency bonds 8,285 - 8,285 - Auction-rate securities backed by student-loan notes 1,711 - - 1,711 Mutual funds and money market funds under deferred compensation plan 43,933 43,933 - - Total $ 510,372 $ 59,395 $ 449,266 $ 1,711

Note 5 - Balance Sheet Compon_2

Note 5 - Balance Sheet Components (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Inventory, Current [Table Text Block]	December 31, 2023 2022 Raw materials $ 118,917 $ 126,760 Work in process 112,750 134,071 Finished goods 152,035 186,459 Total $ 383,702 $ 447,290
Schedule of Other Current Assets [Table Text Block]	December 31, 2023 2022 Other receivables $ 50,000 $ - RSU tax withholding proceeds receivable 20,141 14,480 Prepaid expenses 28,964 11,045 Restricted cash 33,204 - Other 15,154 17,217 Total $ 147,463 $ 42,742
Property, Plant and Equipment [Table Text Block]	December 31, 2023 2022 Land $ 48,490 $ 41,924 Production equipment and software 270,390 254,882 Buildings and improvements 205,132 195,205 Transportation equipment 28,641 28,612 Leasehold improvements 17,052 17,389 Furniture and fixtures 11,711 11,378 Construction in progress 16,980 1,908 Property and equipment, gross 598,396 551,298 Less: accumulated depreciation and amortization (229,444 ) (194,141 ) Total $ 368,952 $ 357,157
Schedule of Other Assets, Noncurrent [Table Text Block]	December 31, 2023 2022 Deferred compensation plan assets $ 78,381 $ 63,022 Prepaid wafer purchases 120,000 170,000 Other 12,896 16,264 Total $ 211,277 $ 249,286
Schedule of Accrued Liabilities [Table Text Block]	December 31, 2023 2022 Dividends and dividend equivalents $ 57,697 $ 42,170 Warranty 16,906 24,082 Stock rotation and sales returns 18,843 14,931 Income tax payable 8,063 15,595 Other 14,282 16,901 Total $ 115,791 $ 113,679
Other Noncurrent Liabilities [Table Text Block]	December 31, 2023 2022 Deferred compensation plan liabilities $ 80,903 $ 64,863 Dividend equivalents 2,187 6,847 Operating lease liabilities 5,565 1,664 Total $ 88,655 $ 73,374

Note 6 - Leases (Tables)

Note 6 - Leases (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Lessee, Operating Lease, Balance Sheet Information [Table Text Block]	December 31, Financial Statement Line Item 2023 2022 Operating lease ROU assets Other long-term assets $ 8,355 $ 4,288 Operating lease liabilities Other accrued liabilities $ 2,303 $ 2,133 Other long-term liabilities $ 5,565 $ 1,664
Lease, Cost [Table Text Block]	Year Ended December 31, 2023 2022 2021 Lease costs: Operating lease costs $ 3,113 $ 2,704 $ 2,454 Other 2,120 1,769 740 Total lease costs $ 5,233 $ 4,473 $ 3,194 Year Ended December 31, 2023 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 2,954 $ 2,762 $ 2,315 ROU assets obtained in exchange for new operating lease liabilities $ 7,081 $ 1,175 $ 5,195 December 31, 2023 2022 Weighted-average remaining lease term (in years) 4.7 2.1 Weighted-average discount rate 4.3 % 2.1 %
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]	2024 $ 2,583 2025 1,909 2026 1,230 2027 1,238 Thereafter 1,653 Total remaining lease payments 8,613 Less: imputed interest (745 ) Total lease liabilities $ 7,868
Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block]	2024 $ 760 2025 235 2026 41 Total $ 1,036

Note 7 - Stock-based Compensa_2

Note 7 - Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Share-Based Payment Arrangement, Cost by Plan [Table Text Block]	Year Ended December 31, 2023 2022 2021 Cost of revenue $ 4,545 $ 4,721 $ 3,543 Research and development 36,611 35,355 26,030 Selling, general and administrative 108,555 120,916 93,906 Total stock-based compensation expense $ 149,711 $ 160,992 $ 123,479 Tax benefit related to stock-based compensation (1) $ 2,519 $ 2,498 $ 1,760
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]	Time-Based RSUs PSUs and MPSUs MSUs Total Number of Shares Weighted-Average Grant Date Fair Value Per Share Number of Shares Weighted-Average Grant Date Fair Value Per Share Number of Shares Weighted-Average Grant Date Fair Value Per Share Number of Shares Weighted-Average Grant Date Fair Value Per Share Outstanding at January 1, 2021 161 $ 151.62 1,390 $ 132.60 1,554 $ 40.40 3,105 $ 87.42 Granted 46 $ 384.33 365 (1) $ 354.12 - $ - 411 $ 357.49 Vested (71 ) $ 144.46 (577 ) $ 91.50 (324 ) $ 23.57 (972 ) $ 72.69 Forfeited (11 ) $ 207.04 (12 ) $ 103.84 (12 ) $ 68.48 (35 ) $ 124.50 Outstanding at December 31, 2021 125 $ 235.82 1,166 $ 222.78 1,218 $ 44.59 2,509 $ 136.87 Granted 49 $ 390.89 35 (1)(2) $ 385.80 917 $ 199.63 1,001 $ 215.63 Vested (61 ) $ 193.18 (452 ) $ 147.78 (324 ) $ 23.57 (837 ) $ 103.02 Forfeited (7 ) $ 316.00 (1 ) $ 377.86 (6 ) $ 216.37 (14 ) $ 275.47 Outstanding at December 31, 2022 106 $ 327.13 748 $ 275.70 1,805 $ 126.57 2,659 $ 176.50 Granted 51 $ 472.38 281 (1) $ 449.38 31 $ 330.95 363 $ 444.86 Vested (49 ) $ 296.65 (543 ) $ 257.24 (319 ) $ 23.57 (911 ) $ 177.54 Forfeited (6 ) $ 387.61 (4 ) $ 315.19 (15 ) $ 110.65 (25 ) $ 209.23 Outstanding at December 31, 2023 102 $ 411.11 482 $ 397.77 1,502 $ 152.89 2,086 $ 222.04
Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]	Year Ended December 31, 2023 2022 2021 Expected term (in years) 0.5 0.5 0.5 Expected volatility 53.3 % 50.6 % 43.2 % Risk-free interest rate 5.3 % 1.9 % 0.1 % Dividend yield 0.8 % 0.6 % 0.6 %

Note 8 - Stockholders' Equity (

Note 8 - Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Dividends Declared [Table Text Block]	Year Ended December 31, 2023 2022 2021 Dividend declared per share $ 4.00 $ 3.00 $ 2.40 Total amount $ 190,642 $ 140,337 $ 110,206

Note 9 - Other Income (Expens_2

Note 9 - Other Income (Expense), Net (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Other Nonoperating Income (Expense) [Table Text Block]	Year Ended December 31, 2023 2022 2021 Interest income $ 23,363 $ 14,369 $ 11,637 Amortization of discount (premium) on available-for-sale securities, net 5,277 (4,375 ) (4,674 ) Gain (loss) on deferred compensation plan investments 8,505 (6,600 ) 4,563 Charitable contributions (14,850 ) (5,900 ) (1,500 ) Gain on sale of equity investment 1,424 - - Other 386 658 (224 ) Total $ 24,105 $ (1,848 ) $ 9,802

Note 10 - Net Income Per Share

Note 10 - Net Income Per Share (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Year Ended December 31, 2023 2022 2021 Numerator: Net income $ 427,374 $ 437,672 $ 242,023 Denominator: Weighted-average outstanding shares - basic 47,610 46,727 45,851 Effect of dilutive securities 1,161 1,631 2,038 Weighted-average outstanding shares - diluted 48,771 48,358 47,889 Net income per share: Basic $ 8.98 $ 9.37 $ 5.28 Diluted $ 8.76 $ 9.05 $ 5.05

Note 11 - Income Taxes (Tables)

Note 11 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]	Year Ended December 31, 2023 2022 2021 United States $ (15,066 ) $ (30,190 ) $ (15,542 ) Foreign 520,907 555,127 287,761 Income before income taxes $ 505,841 $ 524,937 $ 272,219
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Year Ended December 31, 2023 2022 2021 Current: Federal $ 61,064 $ 95,176 $ 24,955 State 4,257 12 35 Foreign 5,702 5,019 3,801 Deferred: Federal (1,705 ) (8,523 ) 4,929 State (744 ) - - Foreign 9,893 (4,419 ) (3,524 ) Income tax expense $ 78,467 $ 87,265 $ 30,196
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Year Ended December 31, 2023 2022 2021 U.S. statutory federal tax rate 21.0 % 21.0 % 21.0 % Foreign income at lower rates (21.9 ) (22.8 ) (23.2 ) GILTI 13.5 16.0 11.4 Changes in valuation allowance 2.9 0.2 0.5 Stock-based compensation 2.2 2.8 1.6 Return to provision true-up adjustment (2.0 ) - (1.1 ) Tax credits, net of reserves (1.1 ) (1.2 ) (0.5 ) State income taxes - (0.2 ) 1.6 Other adjustments 0.9 0.8 (0.2 ) Effective tax rate 15.5 % 16.6 % 11.1 %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	December 31, 2023 2022 Deferred tax assets: Tax credits $ 37,518 $ 32,037 Stock-based compensation 3,404 2,900 Deferred compensation 11,126 9,844 Net operating losses 12,115 9,000 Other expenses not currently deductible 7,755 8,891 Deferred tax assets, gross 71,918 62,672 Valuation allowance (35,008 ) (20,321 ) Deferred tax assets, net of valuation allowance 36,910 42,351 Deferred tax liabilities: Depreciation and amortization (6,420 ) (5,927 ) Undistributed foreign earnings (817 ) (358 ) Other expenses currently deductible (1,619 ) (814 ) Deferred tax liabilities (8,856 ) (7,099 ) Net deferred tax assets $ 28,054 $ 35,252
Summary of Valuation Allowance [Table Text Block]	Period Balance at Beginning of Period Additions Reductions Balance at End of Period Year ended December 31, 2021 $ 18,190 $ 1,560 $ (230 ) $ 19,520 Year ended December 31, 2022 $ 19,520 $ 1,743 $ (942 ) $ 20,321 Year ended December 31, 2023 $ 20,321 $ 15,405 $ (718 ) $ 35,008
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	Balance as of January 1, 2021 $ 33,499 Increase for tax position of current year 9,191 Decrease for tax position of prior year (657 ) Decrease due to settlement with tax authorities (54 ) Decrease due to lapse of statute of limitation (458 ) Balance as of December 31, 2021 41,521 Increase for tax position of current year 10,965 Increase for tax position of prior year 247 Decrease due to settlement with tax authorities (970 ) Decrease due to lapse of statute of limitation (2,486 ) Balance as of December 31, 2022 49,277 Increase for tax position of current year 14,108 Increase for tax position of prior year 2,209 Decrease due to lapse of statute of limitation (1,926 ) Decrease for tax positions of prior year (1,008 ) Balance as of December 31, 2023 $ 62,660

Note 12 - Commitments and Con_2

Note 12 - Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Product Warranty Liability [Table Text Block]	Year Ended December 31, 2023 2022 2021 Balance at beginning of period $ 24,082 $ 20,989 $ 6,895 Warranties issued 2,929 3,092 10,558 Repairs, replacement and refund (2,708 ) (2,357 ) (1,770 ) Changes in liability for pre-existing warranties (7,397 ) 2,358 5,306 Balance at end of period $ 16,906 $ 24,082 $ 20,989
Contractual Obligation, Fiscal Year Maturity [Table Text Block]	2024 $ 367,842 2025 298,958 2026 1,668 2027 31,266 Total $ 699,734

Note 14 - Significant Custome_2

Note 14 - Significant Customers (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	Year Ended December 31, Customer 2023 2022 2021 Distributor A 26 % 24 % 26 % Distributor B 19 % 19 % 15 % Distributor C 10 % * 10 % December 31, Customer 2023 2022 Distributor A 42 % 29 % Distributor B 13 % 23 % Distributor C 10 % *

Note 15 - Segment and Geograp_2

Note 15 - Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	Year Ended December 31, Country or Region 2023 2022 2021 China $ 934,768 $ 938,946 $ 700,985 Taiwan 307,499 233,040 169,130 South Korea 169,867 189,478 93,027 Europe 132,620 145,584 85,201 United States 97,294 99,804 35,770 Japan 93,340 91,048 68,720 Southeast Asia 85,150 95,739 54,611 Other 534 509 354 Total $ 1,821,072 $ 1,794,148 $ 1,207,798
Revenue from External Customers by Products and Services [Table Text Block]	Year Ended December 31, Product Family 2023 2022 2021 DC to DC $ 1,718,623 $ 1,696,594 $ 1,147,329 Lighting Control 102,449 97,554 60,469 Total $ 1,821,072 $ 1,794,148 $ 1,207,798
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]	December 31, Country 2023 2022 2021 China $ 184,685 $ 200,508 $ 211,973 United States 119,430 113,996 113,805 Taiwan 39,419 20,074 19,607 Other 25,418 22,579 17,577 Total $ 368,952 $ 357,157 $ 362,962

Note 16 - Accumulated Other C_2

Note 16 - Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Unrealized Losses on Available-for-Sale Securities Foreign Currency Translation Adjustments Total Balance as of January 1, 2022 $ (1,063 ) $ 16,943 $ 15,880 Other comprehensive loss before reclassifications (6,944 ) (32,293 ) (39,237 ) Amounts reclassified from accumulated other comprehensive loss 96 - 96 Tax effect 184 - 184 Net current period other comprehensive loss (6,664 ) (32,293 ) (38,957 ) Balance as of December 31, 2022 (7,727 ) (15,350 ) (23,077 ) Other comprehensive income (loss) before reclassifications 6,896 (9,528 ) (2,632 ) Amounts reclassified from accumulated other comprehensive income (1 ) - (1 ) Tax effect (1,352 ) - (1,352 ) Net current period other comprehensive income (loss) 5,543 (9,528 ) (3,985 ) Balance as of December 31, 2023 $ (2,184 ) $ (24,878 ) $ (27,062 )

Note 1 - Summary of Significa_3

Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Gain (Loss), Foreign Currency Transaction, before Tax	$ 200	$ 500	$ (700)
Goodwill, Impairment Loss	$ 0	$ 0	$ 0
Minimum [Member]
Warranty Term (Year)	1 year
Maximum [Member]
Warranty Term (Year)	2 years
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	20 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	40 years
Computer Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Transportation Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	5 years
Transportation Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	20 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	5 years

Note 1 - Summary of Significa_4

Note 1 - Summary of Significant Accounting Policies - Summary of Deferred Compensation Plan (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred compensation plan assets	$ 78,381	$ 63,022
Deferred compensation plan liabilities	81,287	64,981
Other Long-term Assets [Member]
Deferred compensation plan assets	78,381	63,022
Accrued Compensation and Related Benefits [Member]
Deferred compensation plan liabilities	384	118
Other Long-term Liabilities [Member]
Deferred compensation plan liabilities	80,903	64,863
Cash Surrender Value [Member]
Deferred compensation plan assets	23,545	19,089
Mutual Funds and Money Market Funds, Fair Value [Member]
Deferred compensation plan assets	$ 54,836	$ 43,933

Note 2 - Revenue Recognition (D

Note 2 - Revenue Recognition (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounts Receivable, after Allowance for Credit Loss, Current	$ 179,858	$ 182,714
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	$ 2,800	$ 3,600
Product [Member]
Percentage of Revenue	99%	98%	97%
Product Sales Through Distribution Arrangements [Member] | Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage	80%	83%	88%

Note 3 - Cash, Cash Equivalen_3

Note 3 - Cash, Cash Equivalents, Investments and Restricted Cash (Details Textual) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	May 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Equity Securities without Readily Determinable Fair Value, Amount			$ 5,400
Proceeds from Sale, Maturity and Collection of Investments	$ 7,400
Gain on Sale of Investments		$ 1,424	$ 0	$ 0
Other Income (Expense) [Member]
Gain on Sale of Investments	$ 1,400

Note 3 - Cash, Cash Equivalen_4

Note 3 - Cash, Cash Equivalents, Investments and Restricted Cash - Cash, Cash Equivalents, Short-term and Long-term Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Cash	$ 392,329	$ 273,145
Money market funds	135,514	15,462
Certificates of deposit	127,123	130,467
Commercial paper	0	17,928
U.S. treasuries and government agency bonds	358,409	8,285
Total	1,109,043	739,584
Cash and cash equivalents	527,843	288,607
Short-term investments	580,633	449,266
Investment within other long-term assets	567	1,711
Corporate Debt Securities [Member]
Available-for-sale securities	95,101	292,586
Auction Rate Securities [Member]
Available-for-sale securities	$ 567	$ 1,711

Note 3 - Cash, Cash Equivalen_5

Note 3 - Cash, Cash Equivalents, Investments and Restricted Cash - Investment Maturity Classification (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Due in less than 1 year, Amortized cost	$ 398,670
Due in less than 1 year, fair value	397,884
Due in 1 - 5 years, Amortized cost	183,266
Due in 1 - 5 years, fair value	182,749
Due in greater than 5 years, Amortized cost	574
Due in greater than 5 years, fair value	567
Total, Amortized cost	582,510
Total, fair value	$ 581,200

Note 3 - Cash, Cash Equivalen_6

Note 3 - Cash, Cash Equivalents, Investments and Restricted Cash - Unrealized Gains and Losses on Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Amortized Cost	$ 718,024	$ 474,643
Total Fair Value	716,714	466,439
Unrealized Gains	331	18
Unrealized Losses	(1,641)	(8,222)
Money Market Funds [Member]
Amortized Cost	135,514	15,462
Total Fair Value	135,514	15,462
Unrealized Gains		0
Unrealized Losses		0
Certificates of Deposit [Member]
Amortized Cost	127,123	130,467
Total Fair Value	127,123	130,467
Unrealized Gains		0
Unrealized Losses		0
Corporate Debt Securities [Member]
Amortized Cost	96,636	300,529
Total Fair Value	95,101	292,586
Unrealized Gains	4	18
Unrealized Losses	(1,539)	(7,961)
US Government Agencies Short-Term Debt Securities [Member]
Amortized Cost	358,177	8,487
Total Fair Value	358,409	8,285
Unrealized Gains	327	0
Unrealized Losses	(95)	(202)
Commercial Paper [Member]
Amortized Cost		17,928
Total Fair Value		17,928
Unrealized Gains		0
Unrealized Losses		0
Auction Rate Securities [Member]
Amortized Cost	574	1,770
Total Fair Value	$ 567	1,711
Unrealized Gains		0
Unrealized Losses		$ (59)

Note 3 - Cash, Cash Equivalen_7

Note 3 - Cash, Cash Equivalents, Investments and Restricted Cash - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Continuous Unrealized Loss Position, Less than 12 Months	$ 118,391	$ 73,930
Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(114)	(975)
Continuous Unrealized Loss Position, 12 Months or Longer	71,373	211,083
Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1,527)	(7,247)
Unrealized Loss Position, Total	189,764	285,013
Unrealized Loss Position, Accumulated Loss, Total	(1,641)	(8,222)
Corporate Debt Securities [Member]
Continuous Unrealized Loss Position, Less than 12 Months	20,792	72,943
Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(19)	(973)
Continuous Unrealized Loss Position, 12 Months or Longer	70,806	202,074
Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1,520)	(6,988)
Unrealized Loss Position, Total	91,598	275,017
Unrealized Loss Position, Accumulated Loss, Total	(1,539)	(7,961)
US Treasury and Government 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)
US Government Agencies Short-Term Debt Securities [Member]
Continuous Unrealized Loss Position, Less than 12 Months		987
Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(2)
Continuous Unrealized Loss Position, 12 Months or Longer		7,298
Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		(200)
Unrealized Loss Position, Total		8,285
Unrealized Loss Position, Accumulated Loss, Total		(202)
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	567	1,711
Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(7)	(59)
Unrealized Loss Position, Total	567	1,711
Unrealized Loss Position, Accumulated Loss, Total	$ (7)	$ (59)

Note 3 - Cash, Cash Equivalen_8

Note 3 - Cash, Cash Equivalents, Investments and Restricted Cash - Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash and cash equivalents	$ 527,843	$ 288,607
Restricted cash included in other current assets	33,204	0
Restricted cash included in other long-term assets	134	122
Total cash, cash equivalents and restricted cash reported on the Consolidated Statements of Cash Flows	$ 561,181	$ 288,729	$ 189,389	$ 335,071

Note 4 - Fair Value Measureme_3

Note 4 - Fair Value Measurements - Financial Assets and Liabilities, Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Total Fair Value	$ 716,714	$ 466,439
Assets, fair value	771,550	510,372
Fair Value, Inputs, Level 1 [Member]
Assets, fair value	190,350	59,395
Fair Value, Inputs, Level 2 [Member]
Assets, fair value	580,633	449,266
Fair Value, Inputs, Level 3 [Member]
Assets, fair value	567	1,711
Money Market Funds [Member]
Total Fair Value	135,514	15,462
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	135,514	15,462
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	127,123	130,467
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	127,123	130,467
Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	0	0
Corporate Debt Securities [Member]
Total Fair Value	95,101	292,586
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	95,101	292,586
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	358,409	8,285
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	358,409	8,285
US Government Agencies Short-Term Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	0	0
Commercial Paper [Member]
Total Fair Value		17,928
Commercial Paper [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value		0
Commercial Paper [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value		17,928
Commercial Paper [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value		0
Auction Rate Securities [Member]
Total Fair Value	567	1,711
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	567	1,711
Mutual Fund [Member]
Total Fair Value	54,836	43,933
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	54,836	43,933
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 5 - Balance Sheet Compon_3

Note 5 - Balance Sheet Components (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Depreciation	$ 40	$ 36.8	$ 28.4

Note 5 - Balance Sheet Compon_4

Note 5 - Balance Sheet Components - Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Raw materials	$ 118,917	$ 126,760
Work in process	112,750	134,071
Finished goods	152,035	186,459
Total	$ 383,702	$ 447,290

Note 5 - Balance Sheet Compon_5

Note 5 - Balance Sheet Components - Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Other receivables	$ 50,000	$ 0
RSU tax withholding proceeds receivable	20,141	14,480
Prepaid expenses	28,964	11,045
Restricted cash included in other current assets	33,204	0
Other	15,154	17,217
Total	$ 147,463	$ 42,742

Note 5 - Balance Sheet Compon_6

Note 5 - Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property and equipment	$ 598,396	$ 551,298
Less: accumulated depreciation and amortization	(229,444)	(194,141)
Total	368,952	357,157
Land [Member]
Property and equipment	48,490	41,924
Production Equipment and Software [Member]
Property and equipment	270,390	254,882
Building and Building Improvements [Member]
Property and equipment	205,132	195,205
Transportation Equipment [Member]
Property and equipment	28,641	28,612
Leasehold Improvements [Member]
Property and equipment	17,052	17,389
Furniture and Fixtures [Member]
Property and equipment	11,711	11,378
Construction in Progress [Member]
Property and equipment	$ 16,980	$ 1,908

Note 5 - Balance Sheet Compon_7

Note 5 - Balance Sheet Components - Other Long-term Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred compensation plan assets	$ 78,381	$ 63,022
Prepaid wafer purchases	120,000	170,000
Other	12,896	16,264
Total	$ 211,277	$ 249,286

Note 5 - Balance Sheet Compon_8

Note 5 - Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Dividends and dividend equivalents	$ 57,697	$ 42,170
Warranty	16,906	24,082
Stock rotation and sales returns	18,843	14,931
Income tax payable	8,063	15,595
Other	14,282	16,901
Total	$ 115,791	$ 113,679

Note 5 - Balance Sheet Compon_9

Note 5 - Balance Sheet Components - Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred compensation plan liabilities	$ 80,903	$ 64,863
Dividend equivalents	2,187	6,847
Operating lease liabilities	5,565	1,664
Total	$ 88,655	$ 73,374

Note 6 - Leases (Details Textua

Note 6 - Leases (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Lessee, Operating Lease, Lease Not yet Commenced, Future Lease Obligations	$ 0
Operating Lease, Lease Income, Lease Payments	$ 1,500	$ 2,400	$ 2,200
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	1 year
Lessor, Operating Lease, Remaining Lease Term (Year)	1 year
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	7 years
Lessee, Operating Lease, Renewal Term (Year)	5 years
Lessor, Operating Lease, Remaining Lease Term (Year)	3 years
Lessor, Operating Lease, Renewal Term (Year)	5 years

Note 6 - Leases - Balance Sheet

Note 6 - Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Operating Lease, Liability, Noncurrent	$ 5,565	$ 1,664
Other Long-term Assets [Member]
Operating lease ROU assets	8,355	4,288
Other Accrued Liabilities [Member]
Operating lease liabilities	2,303	2,133
Other Long-term Liabilities [Member]
Operating Lease, Liability, Noncurrent	$ 5,565	$ 1,664

Note 6 - Leases - Leases Cost (

Note 6 - Leases - Leases Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating lease costs	$ 3,113	$ 2,704	$ 2,454
Other	2,120	1,769	740
Total lease costs	5,233	4,473	3,194
Operating cash flows for operating leases	2,954	2,762	2,315
ROU assets obtained in exchange for new operating lease liabilities	$ 7,081	$ 1,175	$ 5,195
Weighted-average remaining lease term (in years) (Year)	4 years 8 months 12 days	2 years 1 month 6 days
Weighted-average discount rate	4.30%	2.10%

Note 6 - Leases - Maturities of

Note 6 - Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Dec. 31, 2023 USD ($)
2024	$ 2,583
2025	1,909
2026	1,230
2027	1,238
Thereafter	1,653
Total remaining lease payments	8,613
Less: imputed interest	(745)
Accrued Liabilities and Other Long-term Liabilities [Member]
Total lease liabilities	$ 7,868

Note 6 - Leases - Maturities _2

Note 6 - Leases - Maturities of Income Related to Lease Payments (Details) $ in Thousands	Dec. 31, 2023 USD ($)
2024	$ 760
2025	235
2026	41
Total	$ 1,036

Note 7 - Stock-based Compensa_3

Note 7 - Stock-based Compensation (Details Textual) $ / shares in Units, $ in Thousands			1 Months Ended									2 Months Ended	3 Months Ended	12 Months Ended
	Jun. 11, 2020 shares	Dec. 31, 2015 USD ($) shares	Apr. 30, 2023 shares	Feb. 28, 2023 USD ($) shares	Oct. 31, 2022 USD ($) $ / shares shares	Feb. 28, 2022 USD ($) $ / shares shares	Feb. 28, 2021 USD ($) $ / shares shares	Jul. 31, 2020 USD ($) $ / shares shares	Feb. 29, 2020 USD ($) $ / shares shares	Oct. 31, 2018 $ / shares shares	Dec. 31, 2013 $ / shares shares	Feb. 28, 2023	Mar. 31, 2022	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 shares	Dec. 31, 2019 USD ($) shares	Nov. 13, 2014 shares
Share Price (in dollars per share) | $ / shares						$ 393.16	$ 374.57							$ 630.78
Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Excluding Option Exercised | $														$ 1,118	$ 5,358	$ 17,322
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)														363,000	1,001,000	411,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares														$ 444.86	$ 215.63	$ 357.49
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)														911,000	837,000	972,000
Share-based Payment Arrangement, Expense | $														$ 149,711	$ 160,992	$ 123,479
Proceeds from Stock Plans | $														7,568	5,877	4,670
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested | $														461,300	336,800	381,200
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding | $														1,300,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $														$ 232,600
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)														2 years
Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Excluding Option Exercised | $														$ 1,100	$ 5,400	$ 17,300
Time-Based RSUs [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)														51,000	49,000	46,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares														$ 472.38	$ 390.89	$ 384.33
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)														49,000	61,000	71,000
Time-Based RSUs [Member] | Employees [Member]
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								1 year	1 year
PSU2023 [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) | $ / shares														$ 30
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares														$ 467.62
Total number of performance conditions														4
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate														51%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate														3.90%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate														0.90%
PSU2023 [Member] | Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)				69,000
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%
Maximum Stock Compensation Costs | $														$ 156,200
PSU2023 [Member] | Non-Executive Employees [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)				13,000
Maximum Stock Compensation Costs | $				$ 13,800
PSU2023 [Member] | Non-Executive Employees [Member] | Vesting First Quarter of 2025 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage												50%
PSU2023 [Member] | Non-Executive Employees [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Minimum Percentage Allowed												200%
PSU2023 [Member] | Non-Executive Employees [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Minimum Percentage Allowed												300%
PSU 2022 [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $					$ 102,800
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) | $ / shares						$ 30
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares						$ 393.16
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate						44.60%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate						1.50%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate						0.80%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)						4 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions						10.30%
PSU 2022 [Member] | Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)						81,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed						300%
PSU 2022 [Member] | Executive Officer [Member] | Vesting First Quarter of 2023 if Performance Conditions are Met [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage						50%
PSU 2022 [Member] | Non-Executive Employees [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)						14,000
Maximum Stock Compensation Costs | $						$ 142,700
Share-based Compensation Arrangement by Share-based Payment Award, Vesting, Measurement Period of Relative Revenue Growth Rate to Industry Average (Year)													2 years
PSU 2022 [Member] | Non-Executive Employees [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Minimum Percentage Allowed						200%
PSU 2020 [Member]
Share Price (in dollars per share) | $ / shares									$ 182.62
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) | $ / shares									30
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares									$ 182.62
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate									33.60%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate									1.40%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate									1.10%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)									2 years
PSU 2020 [Member] | Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)									100,000							300,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed									300%
Maximum Stock Compensation Costs | $									$ 51,100
Share-based Compensation Arrangement by Share-based Payment Award, Vesting, Measurement Period of Relative Revenue Growth Rate to Industry Average (Year)									2 years
PSU 2020 [Member] | Executive Officer [Member] | Vesting First Quarter of 2022 if Performance Conditions are Met [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage									50%
PSU 2020 [Member] | Non-Executive Employees [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)									30,000							71,000
Maximum Stock Compensation Costs | $						$ 11,100			$ 11,800
Share-based Compensation Arrangement by Share-based Payment Award, Vesting, Measurement Period of Relative Revenue Growth Rate to Industry Average (Year)						2 years			2 years
PSU 2020 [Member] | Non-Executive Employees [Member] | Vesting First Quarter of 2021 if Performance Conditions are Met [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)						29,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage						50%			50%
PSU 2020 [Member] | Non-Executive Employees [Member] | Annual or Quarterly Vesting of Awards Not Based on Performance [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)						2 years			2 years
PSU 2020 [Member] | Non-Executive Employees [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Minimum Percentage Allowed						200%			200%
PSU 2020 [Member] | Non-Executive Employees [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed						300%			300%
PSU 2021 [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) | $ / shares							30
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares							$ 374.57
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate							41.40%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate							0.30%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate							0.60%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)							4 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions							9.80%
PSU 2021 [Member] | Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)							80,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed							300%
Maximum Stock Compensation Costs | $							$ 114,400
Share-based Compensation Arrangement by Share-based Payment Award, Vesting, Measurement Period of Relative Revenue Growth Rate to Industry Average (Year)							2 years
PSU 2021 [Member] | Executive Officer [Member] | Vesting First Quarter of 2023 if Performance Conditions are Met [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)							240,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage							50%
PSU 2021 [Member] | Non-Executive Employees [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)							14,000
Maximum Stock Compensation Costs | $							$ 11,900
Share-based Compensation Arrangement by Share-based Payment Award, Vesting, Measurement Period of Relative Revenue Growth Rate to Industry Average (Year)							2 years
PSU 2021 [Member] | Non-Executive Employees [Member] | Vesting First Quarter of 2021 if Performance Conditions are Met [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)							33,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage							50%
PSU 2021 [Member] | Non-Executive Employees [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Minimum Percentage Allowed							200%
PSU 2021 [Member] | Non-Executive Employees [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Minimum Percentage Allowed							300%
MPSUs 2020 [Member]
Share Price (in dollars per share) | $ / shares																$ 248.71
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed								500%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate																38.80%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate																0.20%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate																0.80%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)																4 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions																8.90%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Price Targets								5
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)																	221,000
Share-based Payment Arrangement, Expense | $								$ 42,100
MPSUs 2020 [Member] | Vest on July, 2023 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage								75%
MPSUs 2020 [Member] | Vest on July 20, 2024 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage								25%
MPSUs 2020 [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award, Stock Price Target (in dollars per share) | $ / shares								$ 260
MPSUs 2020 [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award, Stock Price Target (in dollars per share) | $ / shares								$ 300
MPSUs 2020 [Member] | Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)								43,000
MPSUs 2020 [Member] | Key Employees [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)								2,000
MSUs 2022 [Member]
Share Price (in dollars per share) | $ / shares					$ 342.16	$ 393.16
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)					159,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed					500%	500%
Maximum Stock Compensation Costs | $					$ 119,200	$ 30,100								$ 124,300
Total number of performance conditions						6
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate					54%	39%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate					4.40%	1.70%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate					0.90%	0.80%
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, Number of Price Targets						5
Share-Based Payment Arrangement, Plan Modification, Incremental Cost | $					$ 21,500
MSUs 2022 [Member] | Share-Based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Price Targets					5
MSUs 2022 [Member] | Minimum [Member]
Market Awards Price Targets (in dollars per share) | $ / shares					$ 455	$ 472
MSUs 2022 [Member] | Maximum [Member]
Market Awards Price Targets (in dollars per share) | $ / shares					$ 591	$ 590
MSUs 2022 [Member] | Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)						24,000
MSUs 2018 [Member]
Share Price (in dollars per share) | $ / shares										$ 108.43
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)																		600,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed										500%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate										31.60%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate										3%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions										8.70%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Price Targets										5
Share-based Payment Arrangement, Expense | $																		$ 38,500
Share-based Compensation Arrangement by Share-based Payment Award, Post-Award Vesting Period, Restriction Period on Sales (Year)										2 years
MSUs 2018 [Member] | Minimum [Member]
Market Awards Price Targets (in dollars per share) | $ / shares										$ 140
MSUs 2018 [Member] | Maximum [Member]
Market Awards Price Targets (in dollars per share) | $ / shares										$ 172
MSUs 2018 [Member] | Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)										60,000
MSUs 2018 [Member] | Non-Executive Employees [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)										60,000
2013 MSU's [Member]
Share Price (in dollars per share) | $ / shares											$ 31.73
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed											500%
Maximum Stock Compensation Costs | $		$ 38,100
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate											38.70%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate											1.60%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions											0%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Price Targets											5
Total MSUs Earned (in shares)		1,800,000
2013 MSU's [Member] | Minimum [Member]
Market Awards Price Targets (in dollars per share) | $ / shares											$ 40
2013 MSU's [Member] | Maximum [Member]
Market Awards Price Targets (in dollars per share) | $ / shares											$ 56
2013 MSU's [Member] | Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)											276,000
2013 MSU's [Member] | Non-Executive Employees [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)											84,000
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)														4,200,000
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, Automatic Increase Shares (in shares)			1,000,000
Share-basedCompensation Arrangement by Share-based Payment Award, Other Than Options, Percent Increases in Period			2%
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee (in shares)														2,000
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares per Employee Value (in shares)														25,000
The 2004 Employee Stock Purchase Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)														4,400,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $														$ 400
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)														17,000	14,000	17,000
Employee Stock Purchase Plan Shares Issued, Intrinsic Value | $														$ 1,400	$ 1,600	$ 2,400
Proceeds from Stock Plans | $														$ 7,600	$ 5,900	$ 4,700

Note 7 - Stock-based Compensa_4

Note 7 - Stock-based Compensation - Stock-based Compensation Plan Expenses (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share based compensation expense		$ 149,711	$ 160,992	$ 123,479
Tax benefit related to stock-based compensation	[1]	2,519	2,498	1,760
Cost of Sales [Member]
Share based compensation expense		4,545	4,721	3,543
Research and Development Expense [Member]
Share based compensation expense		36,611	35,355	26,030
Selling, General and Administrative Expenses [Member]
Share based compensation expense		$ 108,555	$ 120,916	$ 93,906
[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 7 - Stock-based Compensa_5

Note 7 - Stock-based Compensation - RSU Summary (Details) - $ / shares		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021
Balance (in shares)		2,659,000	2,509,000		3,105,000
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)		$ 176.5	$ 136.87		$ 87.42
Granted (in shares)		363,000	1,001,000		411,000
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share)		$ 444.86	$ 215.63		$ 357.49
Vested (in shares)		(911,000)	(837,000)		(972,000)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)		$ 177.54	$ 103.02		$ 72.69
Forfeited (in shares)		(25,000)	(14,000)		(35,000)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share)		$ 209.23	$ 275.47		$ 124.5
Balance (in shares)		2,086,000	2,659,000		2,509,000
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)		$ 222.04	$ 176.5		$ 136.87
Time-Based RSUs [Member]
Balance (in shares)		106,000	125,000		161,000
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)		$ 327.13	$ 235.82		$ 151.62
Granted (in shares)		51,000	49,000		46,000
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share)		$ 472.38	$ 390.89		$ 384.33
Vested (in shares)		(49,000)	(61,000)		(71,000)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)		$ 296.65	$ 193.18		$ 144.46
Forfeited (in shares)		(6,000)	(7,000)		(11,000)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share)		$ 387.61	$ 316		$ 207.04
Balance (in shares)		102,000	106,000		125,000
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)		$ 411.11	$ 327.13		$ 235.82
PSUs and MPSUs [Member]
Balance (in shares)		748,000	1,166,000		1,390,000
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)		$ 275.7	$ 222.78		$ 132.6
Granted (in shares)	[1]	281,000	35,000	[2]	365,000
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share)		$ 449.38	$ 385.8		$ 354.12
Vested (in shares)		(543,000)	(452,000)		(577,000)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)		$ 257.24	$ 147.78		$ 91.5
Forfeited (in shares)		(4,000)	(1,000)		(12,000)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share)		$ 315.19	$ 377.86		$ 103.84
Balance (in shares)		482,000	748,000		1,166,000
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)		$ 397.77	$ 275.7		$ 222.78
MSUs [Member]
Balance (in shares)		1,805,000	1,218,000		1,554,000
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)		$ 126.57	$ 44.59		$ 40.4
Granted (in shares)		31,000	917,000		0
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share)		$ 330.95	$ 199.63		$ 0
Vested (in shares)		(319,000)	(324,000)		(324,000)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)		$ 23.57	$ 23.57		$ 23.57
Forfeited (in shares)		(15,000)	(6,000)		(12,000)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share)		$ 110.65	$ 216.37		$ 68.48
Balance (in shares)		1,502,000	1,805,000		1,218,000
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)		$ 152.89	$ 126.57		$ 44.59
[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.[2]Amount included grants and cancellations of the 2022 Executive PSUs as defined under the "2022 PSUs" section.

Note 7 - Stock-based Compensa_6

Note 7 - Stock-based Compensation - Valuation Assumptions (Details) - 2004 Employee Stock Plan [Member] - Employee Stock Purchase Plan [Member]	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Expected term (Year)	6 months	6 months	6 months
Expected volatility	53.30%	50.60%	43.20%
Risk-free interest rate	5.30%	1.90%	0.10%
Dividend yield	0.80%	0.60%	0.60%

Note 8 - Stockholders' Equity_2

Note 8 - Stockholders' Equity (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Oct. 31, 2023	Dec. 31, 2022
Dividends Payable, Current	$ 47,900		$ 35,300
Accrued Dividend Equivalents	$ 11,900		$ 13,800
Stock Repurchased and Retired During Period, Shares (in shares)	7,000
Stock Repurchased and Retired During Period, Value	$ 3,741
Maximum [Member]
Stock Repurchase Program, Authorized Amount		$ 640,000

Note 8 - Stockholders' Equity -

Note 8 - Stockholders' Equity - Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Dividend declared per share (in dollars per share)	$ 1	$ 4	$ 3	$ 2.4
Total amount		$ 190,642	$ 140,337	$ 110,206

Note 9 - Other Income (Expens_3

Note 9 - Other Income (Expense), Net - Interest and Other Income Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest income	$ 23,363	$ 14,369	$ 11,637
Amortization of discount (premium) on available-for-sale securities, net	5,277	(4,375)	(4,674)
Gain (loss) on deferred compensation plan investments	8,505	(6,600)	4,563
Charitable contributions	(14,850)	(5,900)	(1,500)
Gain on sale of equity investment	1,424	0	0
Other	386	658	(224)
Total	$ 24,105	$ (1,848)	$ 9,802

Note 10 - Net Income Per Shar_2

Note 10 - Net Income Per Share - Net Income Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net income	$ 427,374	$ 437,672	$ 242,023
Weighted-average outstanding shares - basic (in shares)	47,610	46,727	45,851
Effect of dilutive securities (in shares)	1,161	1,631	2,038
Weighted-average outstanding shares - diluted (in shares)	48,771	48,358	47,889
Earnings per share, basic (in dollars per share)	$ 8.98	$ 9.37	$ 5.28
Earnings per share, diluted (in dollars per share)	$ 8.76	$ 9.05	$ 5.05

Note 11 - Income Taxes (Details

Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Undistributed Earnings of Foreign Subsidiaries	$ 85,000	$ 67,400
Unrecognized Tax Benefits	62,660	49,277	$ 41,521	$ 33,499
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	48,900	38,300
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	5,700	4,300
Domestic Tax Authority [Member]
Operating Loss Carryforwards	0
Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	0
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	3,600
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	40,600
Foreign Tax Authority [Member]
Operating Loss Carryforwards	92,700
Bermuda Subsidiary [Member]
Foreign Earnings Repatriated	$ 140,000	$ 0	$ 70,000

Note 11 - Income Taxes - Compon

Note 11 - Income Taxes - Components of Income Before Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
United States	$ (15,066)	$ (30,190)	$ (15,542)
Foreign	520,907	555,127	287,761
Income before income taxes	$ 505,841	$ 524,937	$ 272,219

Note 11 - Income Taxes - Comp_2

Note 11 - Income Taxes - Components of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Federal	$ 61,064	$ 95,176	$ 24,955
State	4,257	12	35
Foreign	5,702	5,019	3,801
Federal	(1,705)	(8,523)	4,929
State	(744)	0	0
Foreign	9,893	(4,419)	(3,524)
Income tax expense	$ 78,467	$ 87,265	$ 30,196

Note 11 - Income Taxes - Income

Note 11 - Income Taxes - Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
U.S. statutory federal tax rate	21%	21%	21%
Foreign income at lower rates	(21.90%)	(22.80%)	(23.20%)
GILTI	13.50%	16%	11.40%
Changes in valuation allowance	2.90%	0.20%	0.50%
Stock-based compensation	2.20%	2.80%	1.60%
Return to provision true-up adjustment	(2.00%)	0%	(1.10%)
Tax credits, net of reserves	(1.10%)	(1.20%)	(0.50%)
State income taxes	0%	(0.20%)	1.60%
Other adjustments	0.90%	0.80%	(0.20%)
Effective tax rate	15.50%	16.60%	11.10%

Note 11 - Income Taxes - Deferr

Note 11 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Tax credits	$ 37,518	$ 32,037
Stock-based compensation	3,404	2,900
Deferred compensation	11,126	9,844
Net operating losses	12,115	9,000
Other expenses not currently deductible	7,755	8,891
Deferred tax assets, gross	71,918	62,672
Valuation allowance	(35,008)	(20,321)
Deferred tax assets, net of valuation allowance	36,910	42,351
Depreciation and amortization	(6,420)	(5,927)
Undistributed foreign earnings	(817)	(358)
Other expenses currently deductible	(1,619)	(814)
Deferred tax liabilities	(8,856)	(7,099)
Net deferred tax assets	$ 28,054	$ 35,252

Note 11 - Income Taxes - Reconc

Note 11 - Income Taxes - Reconciliation of Valuation Allowances (Details) - SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Balance	$ 20,321	$ 19,520	$ 18,190
Addition	15,405	1,743	1,560
Reduction	(718)	(942)	(230)
Balance	$ 35,008	$ 20,321	$ 19,520

Note 11 - Income Taxes - Unreco

Note 11 - Income Taxes - Unrecognized Tax Benefits Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Balance	$ 49,277	$ 41,521	$ 33,499
Increase for tax position of current year	14,108	10,965	9,191
Decrease for tax position of prior year	(1,008)		(657)
Decrease due to settlement with tax authorities		(970)	(54)
Decrease due to lapse of statute of limitation	(1,926)	(2,486)	(458)
Increase for tax position of prior year	2,209	247
Balance	$ 62,660	$ 49,277	$ 41,521

Note 12 - Commitments and Con_3

Note 12 - Commitments and Contingencies (Details Textual) $ in Thousands	Dec. 31, 2023 USD ($)
Purchase Obligation	$ 699,734
Long-term Supply Agreement [Member]
Purchase Obligation	$ 120,000

Note 12 - Commitments and Con_4

Note 12 - Commitments and Contingencies - Changes in Warranty Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Balance	$ 24,082	$ 20,989	$ 6,895
Warranties issued	2,929	3,092	10,558
Repairs, replacement and refund	(2,708)	(2,357)	(1,770)
Changes in liability for pre-existing warranties	(7,397)	2,358	5,306
Balance	$ 16,906	$ 24,082	$ 20,989

Note 12 - Commitments and Con_5

Note 12 - Commitments and Contingencies - Estimated Future Unconditional Purchase Commitments (Details) $ in Thousands	Dec. 31, 2023 USD ($)
2024	$ 367,842
2025	298,958
2026	1,668
2027	31,266
Total	$ 699,734

Note 13 - Employee 401(k) Plan

Note 13 - Employee 401(k) Plan (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 0	$ 0	$ 0

Note 14 - Segment, Significant

Note 14 - Segment, Significant Customers and Geographic Information - Customers with Sales and Accounts Receivable Greater Than 10% (Details) - Customer Concentration Risk [Member]	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue Benchmark [Member] | Distributor A [Member]
Concentration risk	26%	24%	26%
Revenue Benchmark [Member] | Distributor B [Member]
Concentration risk	19%	19%	15%
Revenue Benchmark [Member] | Distributor C [Member]
Concentration risk	10%		10%
Accounts Receivable [Member] | Distributor A [Member]
Concentration risk	42%	29%
Accounts Receivable [Member] | Distributor B [Member]
Concentration risk	13%	23%
Accounts Receivable [Member] | Distributor C [Member]
Concentration risk	10%

Note 15 - Segment and Geograp_3

Note 15 - Segment and Geographic Information (Details Textual)	12 Months Ended
	Dec. 31, 2023
Number of Reportable Segments	1

Note 15 - Segment and Geograp_4

Note 15 - Segment and Geographic Information - Revenue By Region (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue	$ 1,821,072	$ 1,794,148	$ 1,207,798
CHINA
Revenue	934,768	938,946	700,985
TAIWAN
Revenue	307,499	233,040	169,130
KOREA, REPUBLIC OF
Revenue	169,867	189,478	93,027
Europe [Member]
Revenue	132,620	145,584	85,201
UNITED STATES
Revenue	97,294	99,804	35,770
JAPAN
Revenue	93,340	91,048	68,720
South East Asia [Member]
Revenue	85,150	95,739	54,611
Other Region [Member]
Revenue	$ 534	$ 509	$ 354

Note 15 - Segment and Geograp_5

Note 15 - Segment and Geographic Information - Revenue By Product Family (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue	$ 1,821,072	$ 1,794,148	$ 1,207,798
DC To DC Products [Member]
Revenue	1,718,623	1,696,594	1,147,329
Lighting Control Products [Member]
Revenue	$ 102,449	$ 97,554	$ 60,469

Note 15 - Segment and Geograp_6

Note 15 - Segment and Geographic Information - Long Lived Assets By Geographic Region (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Long lived assets by region	$ 368,952	$ 357,157	$ 362,962
CHINA
Long lived assets by region	184,685	200,508	211,973
UNITED STATES
Long lived assets by region	119,430	113,996	113,805
TAIWAN
Long lived assets by region	39,419	20,074	19,607
Other Region [Member]
Long lived assets by region	$ 25,418	$ 22,579	$ 17,577

Note 16 - Accumulated Other C_3

Note 16 - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Balance	$ 1,668,602	$ 1,243,985
Balance	2,049,939	1,668,602
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(7,727)	(1,063)
Other comprehensive loss before reclassifications	6,896	(6,944)
Amounts reclassified from accumulated other comprehensive loss	(1)	96
Tax effect	(1,352)	184
Net current period other comprehensive loss	5,543	(6,664)
Balance	(2,184)	(7,727)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(15,350)	16,943
Other comprehensive loss before reclassifications	(9,528)	(32,293)
Amounts reclassified from accumulated other comprehensive loss	0	0
Tax effect	0	0
Net current period other comprehensive loss	(9,528)	(32,293)
Balance	(24,878)	(15,350)
AOCI Attributable to Parent [Member]
Balance	(23,077)	15,880
Other comprehensive loss before reclassifications	(2,632)	(39,237)
Amounts reclassified from accumulated other comprehensive loss	(1)	96
Tax effect	(1,352)	184
Net current period other comprehensive loss	(3,985)	(38,957)
Balance	$ (27,062)	$ (23,077)

Note 17 - Subsequent Events (De

Note 17 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended	12 Months Ended
	Feb. 29, 2024	Jan. 31, 2024	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Common Stock, Dividends, Per Share, Declared (in dollars per share)			$ 1	$ 4	$ 3	$ 2.4
Subsequent Event [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 1.25
Axign [Member] | Subsequent Event [Member]
Business Combination, Consideration Transferred		$ 33.8