$MPWR
Monolithic Power Systems Inc Stock $mpwr

$mpwr Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000143774923004540 Filed on February 24, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$451.1M	$460.0M	$1.794B
YoY Change	19.42%	36.7%	48.55%
Cost Of Revenue	$192.3M	$192.2M	$745.6M
YoY Change	21.06%	34.76%	42.74%
Gross Profit	$258.8M	$267.8M	$1.049B
YoY Change	18.23%	38.14%	52.97%
Gross Profit Margin	57.37%	58.22%	58.44%
Selling, General & Admin	$70.80M	$66.06M	$273.6M
YoY Change	5.42%	7.92%	20.96%
% of Gross Profit	27.36%	24.67%	26.09%
Research & Development	$63.71M	$61.67M	$240.2M
YoY Change	17.75%	13.13%	25.99%
% of Gross Profit	24.62%	23.03%	22.91%
Depreciation & Amortization	$9.987M	$8.765M	$37.11M
YoY Change	9.57%	5.31%	29.32%
% of Gross Profit	3.86%	3.27%	3.54%
Operating Expenses	$134.5M	$127.7M	$521.8M
YoY Change	9.58%	10.38%	23.34%
Operating Profit	$124.3M	$140.1M	$526.8M
YoY Change	29.27%	79.24%	100.74%
Interest Expense	$4.808M	$3.483M	$14.37M
YoY Change	38.92%	3.91%	23.48%
% of Operating Profit	3.87%	2.49%	2.73%
Other Income/Expense, Net	$5.297M	$389.0K	-$1.848M
YoY Change	-935.49%	897.44%	-118.85%
Pretax Income	$129.6M	$140.8M	$524.9M
YoY Change	35.68%	71.74%	92.84%
Income Tax	$19.80M	$21.67M	$87.27M
% Of Pretax Income	15.28%	15.4%	16.62%
Net Earnings	$109.8M	$119.1M	$437.7M
YoY Change	38.0%	63.88%	80.84%
Net Earnings / Revenue	24.34%	25.89%	24.39%
Basic Earnings Per Share	$2.32		$9.37
Diluted Earnings Per Share	$2.26	$2.45	$9.05
COMMON SHARES
Basic Shares Outstanding	47.31M	46.94M	46.73M
Diluted Shares Outstanding	48.66M		48.36M

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments	$917.6M	$737.9M	$737.9M
YoY Change	18.62%	1.76%	1.76%
Cash & Equivalents	$489.0M	$288.6M	$15.46M
Short-Term Investments	$428.6M	$449.3M	$449.3M
Other Short-Term Assets	$89.96M	$42.74M	$19.51M
YoY Change	112.83%	20.26%	40.6%
Inventory	$430.8M	$447.3M	$447.3M
Prepaid Expenses	$9.719M	$11.05M
Receivables	$184.3M	$182.7M	$182.7M
Other Receivables	$19.53M	$23.23M	$23.23M
Total Short-Term Assets	$1.623B	$1.411B	$1.411B
YoY Change	30.11%	25.4%	25.4%
LONG-TERM ASSETS
Property, Plant & Equipment	$354.3M	$357.2M	$361.4M
YoY Change	-4.08%	-1.6%	-2.12%
Goodwill	$6.571M	$6.571M
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$207.6M	$249.3M	$280.3M
YoY Change	205.01%	258.57%	229.15%
Total Long-Term Assets	$604.0M	$648.3M	$648.3M
YoY Change	29.38%	40.63%	40.63%
TOTAL ASSETS
Total Short-Term Assets	$1.623B	$1.411B	$1.411B
Total Long-Term Assets	$604.0M	$648.3M	$648.3M
Total Assets	$2.227B	$2.059B	$2.059B
YoY Change	29.91%	29.83%	29.83%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$58.00M	$61.46M	$61.46M
YoY Change	-18.96%	-25.97%	-25.97%
Accrued Expenses	$156.0M	$113.7M	$144.2M
YoY Change	40.4%	39.86%	34.42%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$315.8M	$263.4M	$263.4M
YoY Change	15.89%	16.06%	16.06%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$77.65M	$73.37M	$126.9M
YoY Change	18.44%	9.14%	10.43%
Total Long-Term Liabilities	$77.65M	$73.37M	$126.9M
YoY Change	18.44%	9.14%	10.43%
TOTAL LIABILITIES
Total Short-Term Liabilities	$315.8M	$263.4M	$263.4M
Total Long-Term Liabilities	$77.65M	$73.37M	$126.9M
Total Liabilities	$450.4M	$390.3M	$390.3M
YoY Change	16.12%	14.17%	14.17%
SHAREHOLDERS EQUITY
Retained Earnings	$777.1M	$716.4M
YoY Change	66.1%	68.61%
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.776B	$1.669B	$1.669B
YoY Change
Total Liabilities & Shareholders Equity	$2.227B	$2.059B	$2.059B
YoY Change	29.91%	29.83%	29.83%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$109.8M	$119.1M	$437.7M
YoY Change	38.0%	63.88%	80.84%
Depreciation, Depletion And Amortization	$9.987M	$8.765M	$37.11M
YoY Change	9.57%	5.31%	29.32%
Cash From Operating Activities	$218.8M	$52.20M	$246.7M
YoY Change	103.69%	85.08%	-22.92%
INVESTING ACTIVITIES
Capital Expenditures	$8.854M	$12.84M	$58.84M
YoY Change	-67.06%	-172.98%	-37.7%
Acquisitions	$0.00
YoY Change
Other Investing Activities	$21.17M	-$37.34M	$46.33M
YoY Change	38.68%	68.55%	-116.33%
Cash From Investing Activities	$12.31M	-$50.18M	-$12.51M
YoY Change	-206.04%	26.24%	-96.7%
FINANCING ACTIVITIES
Cash Dividend Paid	$36.73M		$138.0M
YoY Change	27.41%		26.15%
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$32.25M	-35.86M	-$128.8M
YoY Change	33.0%	31.59%	42.77%
NET CHANGE
Cash From Operating Activities	$218.8M	52.20M	$246.7M
Cash From Investing Activities	$12.31M	-50.18M	-$12.51M
Cash From Financing Activities	-$32.25M	-35.86M	-$128.8M
Net Change In Cash	$200.4M	-33.83M	$99.34M
YoY Change	180.87%	-12.78%	-168.19%
FREE CASH FLOW
Cash From Operating Activities	$218.8M	$52.20M	$246.7M
Capital Expenditures	$8.854M	$12.84M	$58.84M
Free Cash Flow	$210.0M	$39.36M	$187.8M
YoY Change	160.68%	-14.06%	-16.73%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	47107000
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	47107000
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	46256000
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	46256000
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	184000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	613000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-325000	usd
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.00
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.40
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.00
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2022	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	usd
CY2021	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	usd
CY2022Q4	mpwr	Lessee Operating Lease Lease Not Yet Commenced Future Lease Obligations LesseeOperatingLeaseLeaseNotYetCommencedFutureLeaseObligations	0	usd
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	usd
CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	usd
CY2022	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	usd
CY2021Q4	us-gaap	Assets Assets	1585825000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	61461000	usd
CY2021Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	83027000	usd
CY2022Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	88260000	usd
CY2021Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	62635000	usd
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	113679000	usd
CY2021Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	81282000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	263400000	usd
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	226944000	usd
CY2022Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	53509000	usd
CY2021Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	47669000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	73374000	usd
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	67227000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	390283000	usd
CY2021Q4	us-gaap	Liabilities Liabilities	341840000	usd
CY2022Q4	us-gaap	Common Stocks Including Additional Paid In Capital CommonStocksIncludingAdditionalPaidInCapital	975276000	usd
CY2021Q4	us-gaap	Common Stocks Including Additional Paid In Capital CommonStocksIncludingAdditionalPaidInCapital	803226000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	716403000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	424879000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-23077000	usd
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	15880000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1668602000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	1243985000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2058885000	usd
CY2021	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	11771000	usd
CY2020	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	747000	usd
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1585825000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1794148000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1207798000	usd
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	844452000	usd
CY2021Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	21917000	usd
CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	000-51026
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	77-0466789
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	5808 Lake Washington Blvd. NE
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Kirkland
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98033
CY2022	dei	City Area Code CityAreaCode	425
CY2022	dei	Local Phone Number LocalPhoneNumber	296-9956
CY2022	dei	Security12b Title Security12bTitle	Common Stock, par value $0.001 per share
CY2022	dei	Trading Symbol TradingSymbol	MPWR
CY2022	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	13300000000	usd
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	47305000
CY2022	dei	Auditor Firm AuditorFirmId	42
CY2022	dei	Auditor Name AuditorName	Ernst & Young LLP
CY2022	dei	Auditor Location AuditorLocation	San Jose, California
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	288607000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	189265000	usd
CY2022Q4	us-gaap	Short Term Investments ShortTermInvestments	449266000	usd
CY2021Q4	us-gaap	Short Term Investments ShortTermInvestments	535817000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	182714000	usd
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	104813000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	447290000	usd
CY2021Q4	us-gaap	Inventory Net InventoryNet	259417000	usd
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CY2021Q4	us-gaap	Other Assets Current OtherAssetsCurrent	35540000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	1410619000	usd
CY2021Q4	us-gaap	Assets Current AssetsCurrent	1124852000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	357157000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	362962000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	6571000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	6571000	usd
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	35252000	usd
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CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	69523000	usd
CY2022Q4	us-gaap	Assets Assets	2058885000	usd
CY2022	us-gaap	Cost Of Revenue CostOfRevenue	745596000	usd
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CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	247763000	usd
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CY2021	us-gaap	Research And Development Expense Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost	190627000	usd
CY2020	us-gaap	Research And Development Expense Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost	137598000	usd
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CY2022	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	8001000	usd
CY2021	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	6225000	usd
CY2020	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	7804000	usd
CY2022	us-gaap	Operating Expenses OperatingExpenses	521767000	usd
CY2021	us-gaap	Operating Expenses OperatingExpenses	423042000	usd
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CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1848000	usd
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CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	524937000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	272219000	usd
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CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	47014000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	437672000	usd
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CY2020	us-gaap	Net Income Loss NetIncomeLoss	164375000	usd
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CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1466000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-38957000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	5740000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	15616000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	398715000	usd
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CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	773491000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	164375000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	15616000	usd
CY2020	us-gaap	Dividends Dividends	95079000	usd
CY2022	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	22471000	usd
CY2021	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	22737000	usd
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	3819000	usd
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	85598000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	966587000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	242023000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	5740000	usd
CY2021	us-gaap	Dividends Dividends	115890000	usd
CY2021	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	17322000	usd
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	4670000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	123533000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	1243985000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	437672000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-38957000	usd
CY2022	us-gaap	Dividends Dividends	146148000	usd
CY2022	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	5358000	usd
CY2022	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	5877000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	160815000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1668602000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	437672000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	242023000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	164375000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	37114000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	28699000	usd
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	19186000	usd
CY2022	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-4375000	usd
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-4674000	usd
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2979000	usd
CY2022	mpwr	Gain Loss On Deferred Compensation Plan Investments Cash Flow GainLossOnDeferredCompensationPlanInvestmentsCashFlow	-6600000	usd
CY2021	mpwr	Gain Loss On Deferred Compensation Plan Investments Cash Flow GainLossOnDeferredCompensationPlanInvestmentsCashFlow	4563000	usd
CY2020	mpwr	Gain Loss On Deferred Compensation Plan Investments Cash Flow GainLossOnDeferredCompensationPlanInvestmentsCashFlow	4592000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-13220000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2772000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1627000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	160992000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	123479000	usd
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	85551000	usd
CY2022	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-97000	usd
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-110000	usd
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	1072000	usd
CY2022	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	77903000	usd
CY2021	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	37976000	usd
CY2020	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	14123000	usd
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	188073000	usd
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	102323000	usd
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	29503000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	177284000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	15311000	usd
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3003000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-11240000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	32926000	usd
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	10410000	usd
CY2022	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	28514000	usd
CY2021	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	16536000	usd
CY2020	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	18524000	usd
CY2022	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	16559000	usd
CY2020	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	19951000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	246674000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	320010000	usd
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	267803000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	58843000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	94420000	usd
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	55610000	usd
CY2022	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	63700000	usd
CY2021	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	394886000	usd
CY2020	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	334947000	usd
CY2022	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	127860000	usd
CY2021	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	113255000	usd
CY2020	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	357092000	usd
CY2022	us-gaap	Payments To Acquire Longterm Investments PaymentsToAcquireLongtermInvestments	2085000	usd
CY2021	us-gaap	Payments To Acquire Longterm Investments PaymentsToAcquireLongtermInvestments	-0	usd
CY2020	us-gaap	Payments To Acquire Longterm Investments PaymentsToAcquireLongtermInvestments	3316000	usd
CY2022	us-gaap	Proceeds From Sale Of Longterm Investments ProceedsFromSaleOfLongtermInvestments	750000	usd
CY2021	us-gaap	Proceeds From Sale Of Longterm Investments ProceedsFromSaleOfLongtermInvestments	500000	usd
CY2020	us-gaap	Proceeds From Sale Of Longterm Investments ProceedsFromSaleOfLongtermInvestments	300000	usd
CY2022	mpwr	Contributions Made To Deferred Compensation Plan ContributionsMadeToDeferredCompensationPlan	16492000	usd
CY2021	mpwr	Contributions Made To Deferred Compensation Plan ContributionsMadeToDeferredCompensationPlan	2542000	usd
CY2020	mpwr	Contributions Made To Deferred Compensation Plan ContributionsMadeToDeferredCompensationPlan	2696000	usd
CY2022	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	-0	usd
CY2021	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	793000	usd
CY2020	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	-0	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-12510000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-378886000	usd
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-39177000	usd
CY2022	mpwr	Property And Equipment Purchased On Extended Payment Terms PropertyAndEquipmentPurchasedOnExtendedPaymentTerms	2055000	usd
CY2021	mpwr	Property And Equipment Purchased On Extended Payment Terms PropertyAndEquipmentPurchasedOnExtendedPaymentTerms	2834000	usd
CY2020	mpwr	Property And Equipment Purchased On Extended Payment Terms PropertyAndEquipmentPurchasedOnExtendedPaymentTerms	5357000	usd
CY2022	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	5358000	usd
CY2021	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	17322000	usd
CY2020	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	18767000	usd
CY2022	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	5877000	usd
CY2021	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	4670000	usd
CY2020	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	3819000	usd
CY2022	us-gaap	Payments Of Dividends PaymentsOfDividends	137965000	usd
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	109364000	usd
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	88786000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-128785000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-90206000	usd
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-71557000	usd
CY2022	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-6039000	usd
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3400000	usd
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4926000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	99340000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-145682000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	161995000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	189389000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	335071000	usd
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	173076000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	288729000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	189389000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	335071000	usd
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	85031000	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	21148000	usd
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1405000	usd
CY2022	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	5743000	usd
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	17877000	usd
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	7839000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	288729000	usd
CY2022Q4	mpwr	Dividends And Dividend Equivalents Accrued DividendsAndDividendEquivalentsAccrued	40939000	usd
CY2021Q4	mpwr	Dividends And Dividend Equivalents Accrued DividendsAndDividendEquivalentsAccrued	33059000	usd
CY2020Q4	mpwr	Dividends And Dividend Equivalents Accrued DividendsAndDividendEquivalentsAccrued	27507000	usd
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;margin:0pt;"><b><i>Use of Estimates</i></b></p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;margin:0pt;">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 <em style="font: inherit;"> may </em>be material to the Company’s consolidated financial statements. </p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p>
CY2022	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;margin:0pt;"><b><i>Certain Significant Risks and Uncertainties</i></b></p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;margin:0pt;">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 <em style="font: inherit;">three</em> months or less. The Company’s short-term investments <em style="font: inherit;"> may </em>consist of corporate debt securities, certificates of deposit, commercial paper and government agency bonds and treasuries, and the long-term investments consist of government-backed student loan auction-rate securities and non-marketable equity investments.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;margin:0pt;">The Company does <em style="font: inherit;">not</em> require its customers to provide collateral to support accounts receivable. The Company assesses the collectability by reviewing accounts receivable on a customer-by-customer basis. To manage credit risk, management performs ongoing credit evaluations of the customers’ financial condition, monitors payment performance, and assesses current economic conditions, as well as reasonable and supportable forecasts of future economic conditions, that <em style="font: inherit;"> may </em>affect collectability of the outstanding receivables. For certain high-risk customers, the Company requires standby letters of credit or advance payment prior to shipments of goods.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;margin:0pt;">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; changes in <em style="font: inherit;">third</em>-party manufacturers or the terms of such arrangements; changes in key suppliers; changes in certain strategic relationships or customer relationships; litigation or claims against the Company based on intellectual property, patent, product, regulatory or other factors; fluctuations in foreign currency exchange rates; risk associated with changes in government policies and regulations on trade restrictions and corporate taxes; availability of necessary components or sub-assemblies; availability of foundry capacity; ability to integrate acquired companies; and the Company’s ability to attract and retain employees necessary to support its growth.</p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:center;margin:0pt;"> </p>
CY2022	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	500000	usd
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-700000	usd
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-1400000	usd
CY2022Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	63022000	usd
CY2021Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	53172000	usd
CY2022Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	64981000	usd
CY2021Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	55771000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	189389000	usd
CY2022	mpwr	Lapse Period For Consignment LapsePeriodForConsignment	P60D
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	182700000	usd
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	104800000	usd
CY2022	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	4300000	usd
CY2022Q4	us-gaap	Cash Cash	273145000	usd
CY2021Q4	us-gaap	Cash Cash	174937000	usd
CY2022Q4	us-gaap	Money Market Funds At Carrying Value MoneyMarketFundsAtCarryingValue	15462000	usd
CY2021Q4	us-gaap	Money Market Funds At Carrying Value MoneyMarketFundsAtCarryingValue	14328000	usd
CY2022Q4	us-gaap	Certificates Of Deposit At Carrying Value CertificatesOfDepositAtCarryingValue	130467000	usd
CY2021Q4	us-gaap	Certificates Of Deposit At Carrying Value CertificatesOfDepositAtCarryingValue	141478000	usd
CY2022Q4	us-gaap	Commercial Paper At Carrying Value CommercialPaperAtCarryingValue	17928000	usd
CY2021Q4	us-gaap	Commercial Paper At Carrying Value CommercialPaperAtCarryingValue	0	usd
CY2022Q4	us-gaap	Us Government Securities At Carrying Value USGovernmentSecuritiesAtCarryingValue	8285000	usd
CY2021Q4	us-gaap	Us Government Securities At Carrying Value USGovernmentSecuritiesAtCarryingValue	7456000	usd
CY2022Q4	mpwr	Cash Cash Equivalents And Investments CashCashEquivalentsAndInvestments	739584000	usd
CY2021Q4	mpwr	Cash Cash Equivalents And Investments CashCashEquivalentsAndInvestments	727483000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	288607000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	189265000	usd
CY2022Q4	us-gaap	Short Term Investments ShortTermInvestments	449266000	usd
CY2021Q4	us-gaap	Short Term Investments ShortTermInvestments	535817000	usd
CY2022Q4	us-gaap	Long Term Investments LongTermInvestments	1711000	usd
CY2021Q4	us-gaap	Long Term Investments LongTermInvestments	2401000	usd
CY2022Q4	mpwr	Cash Cash Equivalents And Investments CashCashEquivalentsAndInvestments	739584000	usd
CY2021Q4	mpwr	Cash Cash Equivalents And Investments CashCashEquivalentsAndInvestments	727483000	usd
CY2020	mpwr	Gain Loss On Charitable Contribution GainLossOnCharitableContribution	-766000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	204000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	503000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	355492000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	351915000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	101919000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	97351000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	1770000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1711000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	459181000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	450977000	usd
CY2020	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	1100000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	474643000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	18000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	8222000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	466439000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	553902000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	570000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1926000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	552546000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	73930000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	975000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	211083000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	7247000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	285013000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	8222000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	293410000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1804000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	7161000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	122000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	300571000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1926000	usd
CY2022	mpwr	Redemption Auction Rate Securities To Date RedemptionAuctionRateSecuritiesToDate	41500000	usd
CY2022	mpwr	Percentage Of Auction Rate Securities Redeemedat Par Value PercentageOfAuctionRateSecuritiesRedeemedatParValue	0.96	pure
CY2022Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	5400000	usd
CY2021Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	3300000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	288607000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	189265000	usd
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	122000	usd
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	124000	usd
CY2022Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	510372000	usd
CY2021Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	584332000	usd
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1650000	usd
CY2022Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	126760000	usd
CY2021Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	29478000	usd
CY2022Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	134071000	usd
CY2021Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	130029000	usd
CY2022Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	186459000	usd
CY2021Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	99910000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	447290000	usd
CY2021Q4	us-gaap	Inventory Net InventoryNet	259417000	usd
CY2022Q4	mpwr	Tax Withholding Share Based Payment Arrangement Proceeds Receivable TaxWithholdingShareBasedPaymentArrangementProceedsReceivable	14480000	usd
CY2021Q4	mpwr	Tax Withholding Share Based Payment Arrangement Proceeds Receivable TaxWithholdingShareBasedPaymentArrangementProceedsReceivable	16224000	usd
CY2022Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	11045000	usd
CY2021Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	9526000	usd
CY2022Q4	us-gaap	Interest Receivable Current InterestReceivableCurrent	8752000	usd
CY2021Q4	us-gaap	Interest Receivable Current InterestReceivableCurrent	5440000	usd
CY2022Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	8465000	usd
CY2021Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	4350000	usd
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	42742000	usd
CY2021Q4	us-gaap	Other Assets Current OtherAssetsCurrent	35540000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	551298000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	534840000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	194141000	usd
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	171878000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	357157000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	362962000	usd
CY2022	us-gaap	Depreciation Depreciation	36800000	usd
CY2021	us-gaap	Depreciation Depreciation	28400000	usd
CY2020	us-gaap	Depreciation Depreciation	18900000	usd
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1848000	usd
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	9802000	usd
CY2022Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	63022000	usd
CY2021Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	53172000	usd
CY2022Q4	mpwr	Prepaid Wafer Purchase Noncurrent PrepaidWaferPurchaseNoncurrent	170000000	usd
CY2021Q4	mpwr	Prepaid Wafer Purchase Noncurrent PrepaidWaferPurchaseNoncurrent	0	usd
CY2022Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	16264000	usd
CY2021Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	16351000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	249286000	usd
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	69523000	usd
CY2022Q4	mpwr	Prepaid Expenses Deposit To Vendor PrepaidExpensesDepositToVendor	170000000.0	usd
CY2022Q4	mpwr	Dividends And Dividend Equivalents DividendsAndDividendEquivalents	42170000	usd
CY2021Q4	mpwr	Dividends And Dividend Equivalents DividendsAndDividendEquivalents	32364000	usd
CY2022Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	24082000	usd
CY2021Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	20989000	usd
CY2022Q4	mpwr	Stock Rotation Reserve And Accrued Sales Returns StockRotationReserveAndAccruedSalesReturns	14931000	usd
CY2021Q4	mpwr	Stock Rotation Reserve And Accrued Sales Returns StockRotationReserveAndAccruedSalesReturns	5748000	usd
CY2022Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	15595000	usd
CY2021Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	4921000	usd
CY2022Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	16901000	usd
CY2021Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	17260000	usd
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	113679000	usd
CY2021Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	81282000	usd
CY2022Q4	mpwr	Inventory Stock Rotation Reserve InventoryStockRotationReserve	14300000	usd
CY2021Q4	mpwr	Inventory Stock Rotation Reserve InventoryStockRotationReserve	5500000	usd
CY2022Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	64863000	usd
CY2021Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	55489000	usd
CY2022Q4	mpwr	Dividend Equivalents Noncurrent DividendEquivalentsNoncurrent	6847000	usd
CY2021Q4	mpwr	Dividend Equivalents Noncurrent DividendEquivalentsNoncurrent	8470000	usd
CY2022Q4	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	1664000	usd
CY2021Q4	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	3268000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	73374000	usd
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	67227000	usd
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	10460000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	2704000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	2454000	usd
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	1488000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1769000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	740000	usd
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	300000	usd
CY2022	us-gaap	Lease Cost LeaseCost	4473000	usd
CY2021	us-gaap	Lease Cost LeaseCost	3194000	usd
CY2020	us-gaap	Lease Cost LeaseCost	1788000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	2762000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	2315000	usd
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	1526000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1175000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	5195000	usd
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	2181000	usd
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P2Y1M6D
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P2Y9M18D
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.021	pure
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.020	pure
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	2191000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1073000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	614000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	8000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	3886000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	89000	usd
CY2022	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	2400000	usd
CY2021	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	2200000	usd
CY2020	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	1900000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.008	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.014	pure
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	1566000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	612000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	106000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	20000	usd
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	2304000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	160992000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	123479000	usd
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	85551000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2498000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1760000	usd
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1855000	usd
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	4053000
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	59.16
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	703000
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	175.12
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	1623000
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	54.70
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	28000
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	96.35
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	3105000
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	87.42
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	411000
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	357.49
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	972000
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	72.69
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	35000
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	124.50
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	2509000
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	136.87
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	1001000
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	215.63
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	837000
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	103.02
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	14000
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	275.47
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	2659000
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	176.50
CY2022Q4	us-gaap	Share Price SharePrice	353.61
CY2022Q1	us-gaap	Share Price SharePrice	393.16
CY2021Q1	us-gaap	Share Price SharePrice	374.57
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.010	pure
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.00
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.40
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.00
CY2022	us-gaap	Dividends Common Stock DividendsCommonStock	140337000	usd
CY2021	us-gaap	Dividends Common Stock DividendsCommonStock	110206000	usd
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	89832000	usd
CY2022Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	35300000	usd
CY2021Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	27700000	usd
CY2022Q4	mpwr	Accrued Dividend Equivalents AccruedDividendEquivalents	13800000	usd
CY2021Q4	mpwr	Accrued Dividend Equivalents AccruedDividendEquivalents	13100000	usd
CY2022	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	14369000	usd
CY2021	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	11637000	usd
CY2020	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	9327000	usd
CY2022	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-4375000	usd
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-4674000	usd
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2979000	usd
CY2022	mpwr	Gain Loss On Deferred Compensation Plan Investments GainLossOnDeferredCompensationPlanInvestments	-6600000	usd
CY2021	mpwr	Gain Loss On Deferred Compensation Plan Investments GainLossOnDeferredCompensationPlanInvestments	4563000	usd
CY2020	mpwr	Gain Loss On Deferred Compensation Plan Investments GainLossOnDeferredCompensationPlanInvestments	4592000	usd
CY2022	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	454000	usd
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-727000	usd
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-1364000	usd
CY2022	mpwr	Gain Loss On Charitable Contribution GainLossOnCharitableContribution	-5900000	usd
CY2021	mpwr	Gain Loss On Charitable Contribution GainLossOnCharitableContribution	-1500000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.166	pure
CY2022	us-gaap	Net Income Loss NetIncomeLoss	437672000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	242023000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	164375000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46727000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	45851000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	44840000
CY2022	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1631000
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2038000
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2174000
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48358000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	47889000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	47014000
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	9.37
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.28
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.67
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	9.05
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.05
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.50
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-30190000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-15542000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	39286000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	555127000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	287761000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	130056000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	524937000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	272219000	usd
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.111	pure
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	169342000	usd
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.029	pure
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	95176000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	24955000	usd
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	2842000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	12000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	35000	usd
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-1000	usd
CY2022	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	5019000	usd
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	3801000	usd
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	3814000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-8523000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	4929000	usd
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1221000	usd
CY2022	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-4419000	usd
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-3524000	usd
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-467000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	87265000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	30196000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4967000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210	pure
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.228	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.232	pure
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.152	pure
CY2022	mpwr	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncome	0.160	pure
CY2021	mpwr	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncome	0.114	pure
CY2020	mpwr	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncome	0.111	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.002	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.005	pure
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.016	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.028	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.016	pure
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.112	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.012	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.011	pure
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.038	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.002	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.005	pure
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.016	pure
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	247000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	970000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	32037000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	26302000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	2900000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	2027000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	9844000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	8526000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	9000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	5818000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	8891000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	5151000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	62672000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	47824000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	20321000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	19520000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	42351000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	28304000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	5927000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	5067000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	358000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	375000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	814000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	945000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	7099000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	6387000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	35252000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	21917000	usd
CY2022Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	67400000	usd
CY2021Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	46200000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	49300000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	38300000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	41500000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	31500000	usd
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	25407000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	9782000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	907000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	560000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	223000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	33499000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	9191000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	657000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	54000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	458000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	41521000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	10965000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	2486000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	49277000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	4300000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	3300000	usd
CY2021Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	20989000	usd
CY2020Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	6895000	usd
CY2019Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	1139000	usd
CY2022	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	3092000	usd
CY2021	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	10558000	usd
CY2020	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	6395000	usd
CY2022	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	2357000	usd
CY2021	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	1770000	usd
CY2020	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	843000	usd
CY2022	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	2358000	usd
CY2021	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	5306000	usd
CY2020	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	204000	usd
CY2022Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	24082000	usd
CY2021Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	20989000	usd
CY2020Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	6895000	usd
CY2022Q4	us-gaap	Purchase Obligation Due In Next Twelve Months PurchaseObligationDueInNextTwelveMonths	455383000	usd
CY2022Q4	us-gaap	Purchase Obligation Due In Second Year PurchaseObligationDueInSecondYear	291528000	usd
CY2022Q4	us-gaap	Purchase Obligation Due In Third Year PurchaseObligationDueInThirdYear	349765000	usd
CY2022Q4	us-gaap	Purchase Obligation PurchaseObligation	1096676000	usd
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	pure
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1794148000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1207798000	usd
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	844452000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1794148000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1207798000	usd
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	844452000	usd
CY2022Q4	us-gaap	Noncurrent Assets NoncurrentAssets	357157000	usd
CY2021Q4	us-gaap	Noncurrent Assets NoncurrentAssets	362962000	usd
CY2020Q4	us-gaap	Noncurrent Assets NoncurrentAssets	281528000	usd
CY2022Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.75

Files In Submission

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$MPWR
Monolithic Power Systems Inc Stock $mpwr

2023 Q1 Form 10-K Financial Statement

#000143774923004540 Filed on February 24, 2023

Income Statement

Balance Sheet

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$MPWR Monolithic Power Systems Inc Stock $mpwr

2023 Q1 Form 10-K Financial Statement

#000143774923004540 Filed on February 24, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MPWR
Monolithic Power Systems Inc Stock $mpwr