$KLIC
KULICKE & SOFFA INDUSTRIES INC Stock $klic

$klic Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000005697821000153 Filed on November 18, 2021

Income Statement

Concept	2021 Q4	2021 Q3	2021 Q2
Revenue	$485.3M	$424.3M	$340.2M
YoY Change	173.12%		126.1%
Cost Of Revenue	$254.0M	$228.6M	$191.7M
YoY Change	186.05%		136.55%
Gross Profit	$231.3M	$195.7M	$148.5M
YoY Change	160.2%		113.89%
Gross Profit Margin	47.66%	46.12%	43.65%
Selling, General & Admin	$44.45M	$39.10M	$30.51M
YoY Change	46.7%		9.33%
% of Gross Profit	19.22%	19.98%	20.55%
Research & Development	$34.93M	$36.14M	$34.87M
YoY Change	-1.88%		14.15%
% of Gross Profit	15.1%	18.47%	23.48%
Depreciation & Amortization	$5.258M	$3.465M	$3.245M
YoY Change	3.1%		-0.31%
% of Gross Profit	2.27%	1.77%	2.19%
Operating Expenses	$79.38M	$75.24M	$65.38M
YoY Change	20.64%		11.85%
Operating Profit	$151.9M	$120.5M	$83.11M
YoY Change	557.73%		657.58%
Interest Expense	$448.0K	$41.00K	$74.00K
YoY Change	-25.33%		-83.41%
% of Operating Profit	0.29%	0.03%	0.09%
Other Income/Expense, Net
YoY Change
Pretax Income	$155.3M	$121.0M	$83.63M
YoY Change	555.21%		602.8%
Income Tax	$21.57M	$7.212M	$12.21M
% Of Pretax Income	13.89%	5.96%	14.6%
Net Earnings	$133.7M	$113.8M	$71.32M
YoY Change	746.27%		539.58%
Net Earnings / Revenue	27.55%	26.81%	20.97%
Basic Earnings Per Share		$1.83	$1.15
Diluted Earnings Per Share	$2.090M	$1.79	$1.13
COMMON SHARES
Basic Shares Outstanding	62.42M shares	62.02M shares	62.07M shares
Diluted Shares Outstanding		63.49M shares	63.24M shares

Balance Sheet

Concept	2021 Q4	2021 Q3	2021 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$739.8M	$635.0M	$564.3M
YoY Change	39.56%		9.4%
Cash & Equivalents	$362.8M	$388.0M	$257.3M
Short-Term Investments	$377.0M	$247.0M	$307.0M
Other Short-Term Assets	$23.59M	$21.92M	$23.50M
YoY Change	20.34%		71.53%
Inventory	$167.3M	$153.3M	$140.0M
Prepaid Expenses
Receivables	$421.2M	$369.3M	$307.9M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.352B	$1.180B	$1.036B
YoY Change	57.16%		23.42%
LONG-TERM ASSETS
Property, Plant & Equipment	$67.98M	$66.23M	$61.97M
YoY Change	14.94%		11.0%
Goodwill	$72.95M	$73.68M	$73.55M
YoY Change	28.67%		31.21%
Intangibles	$42.75M	$45.03M	$46.05M
YoY Change	12.59%		20.52%
Long-Term Investments	$0.00	$0.00	$0.00
YoY Change	-100.0%		-100.0%
Other Assets	$2.363M	$2.351M	$2.292M
YoY Change	8.1%		8.52%
Total Long-Term Assets	$249.7M	$230.3M	$221.2M
YoY Change	28.49%		16.27%
TOTAL ASSETS
Total Short-Term Assets	$1.352B	$1.180B	$1.036B
Total Long-Term Assets	$249.7M	$230.3M	$221.2M
Total Assets	$1.602B	$1.410B	$1.257B
YoY Change	51.88%		22.1%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$154.6M	$144.3M	$123.8M
YoY Change	168.06%		149.36%
Accrued Expenses	$72.48M	$63.01M	$47.10M
YoY Change	218.46%		0.21%
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	$351.9M	$308.3M	$259.6M
YoY Change	122.86%		81.77%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$14.19M	$13.22M	$13.17M
YoY Change	14.47%		30.69%
Total Long-Term Liabilities	$14.19M	$13.22M	$13.17M
YoY Change	14.47%		30.69%
TOTAL LIABILITIES
Total Short-Term Liabilities	$351.9M	$308.3M	$259.6M
Total Long-Term Liabilities	$14.19M	$13.22M	$13.17M
Total Liabilities	$506.4M	$436.5M	$390.1M
YoY Change	70.75%		39.42%
SHAREHOLDERS EQUITY
Retained Earnings	$948.6M	$823.5M	$718.4M
YoY Change	53.96%		18.21%
Common Stock	$550.1M	$546.2M	$542.1M
YoY Change	2.02%		1.05%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$400.4M	$396.7M	$392.7M
YoY Change	1.42%		1.39%
Treasury Stock Shares	23.43M shares	23.38M shares	23.30M shares
Shareholders Equity	$1.095B	$973.3M	$866.9M
YoY Change
Total Liabilities & Shareholders Equity	$1.602B	$1.410B	$1.257B
YoY Change	51.88%		22.1%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2021 Q2
OPERATING ACTIVITIES
Net Income	$133.7M	$113.8M	$71.32M
YoY Change	746.27%		539.58%
Depreciation, Depletion And Amortization	$5.258M	$3.465M	$3.245M
YoY Change	3.1%		-0.31%
Cash From Operating Activities	$123.4M	$90.96M	$27.10M
YoY Change	289.2%		14.83%
INVESTING ACTIVITIES
Capital Expenditures	-$6.028M	-$7.847M	-$4.000M
YoY Change	54.56%		29.03%
Acquisitions
YoY Change
Other Investing Activities	-$129.9M	$60.07M	$5.800M
YoY Change	-12.17%		-89.26%
Cash From Investing Activities	-$135.9M	$52.22M	$1.800M
YoY Change	-10.51%		-96.46%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-12.28M	-12.88M	-9.900M
YoY Change	-19.24%		-93.17%
NET CHANGE
Cash From Operating Activities	123.4M	90.96M	27.10M
Cash From Investing Activities	-135.9M	52.22M	1.800M
Cash From Financing Activities	-12.28M	-12.88M	-9.900M
Net Change In Cash	-24.83M	130.3M	19.00M
YoY Change	-81.66%		-126.99%
FREE CASH FLOW
Cash From Operating Activities	$123.4M	$90.96M	$27.10M
Capital Expenditures	-$6.028M	-$7.847M	-$4.000M
Free Cash Flow	$129.4M	$98.80M	$31.10M
YoY Change	263.49%		16.48%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Registrant Name EntityRegistrantName	KULICKE & SOFFA INDUSTRIES INC
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000056978
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--10-02
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Singapore
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	687000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	968000	USD
CY2021Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2020Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2021Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2021Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2021Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2020Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	85364000	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	85364000	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	61931000	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	61558000	shares
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	23433000	shares
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	23806000	shares
CY2020Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2021Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2021Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2021	klic	Period Of Warranty For Manufacturing Defects PeriodOfWarrantyForManufacturingDefects	P1Y
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-10-02
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	0-121
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	PA
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	23-1498399
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	23A Serangoon North Avenue 5
CY2021	dei	Entity Address Address Line2 EntityAddressAddressLine2	#01-01
CY2021	dei	Entity Address Country EntityAddressCountry	SG
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	554369
CY2021	dei	City Area Code CityAreaCode	215
CY2021	dei	Local Phone Number LocalPhoneNumber	784-6000
CY2021	dei	Security12b Title Security12bTitle	Common Stock, Without Par Value
CY2021	dei	Trading Symbol TradingSymbol	KLIC
CY2021	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	3189300000	USD
CY2021Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	62421143	shares
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	362788000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	188127000	USD
CY2021Q4	us-gaap	Short Term Investments ShortTermInvestments	377000000	USD
CY2020Q4	us-gaap	Short Term Investments ShortTermInvestments	342000000	USD
CY2021Q4	us-gaap	Accounts Notes And Loans Receivable Net Current AccountsNotesAndLoansReceivableNetCurrent	421193000	USD
CY2020Q4	us-gaap	Accounts Notes And Loans Receivable Net Current AccountsNotesAndLoansReceivableNetCurrent	198640000	USD
CY2021Q4	us-gaap	Inventory Net InventoryNet	167323000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	111809000	USD
CY2021Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	23586000	USD
CY2020Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	19620000	USD
CY2021Q4	us-gaap	Assets Current AssetsCurrent	1351890000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	860196000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	67982000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	59147000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	41592000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	22688000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	72949000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	56695000	USD
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	42752000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	37972000	USD
CY2021Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	15715000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	8147000	USD
CY2021Q4	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	6388000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	7535000	USD
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	2363000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	2186000	USD
CY2021Q4	us-gaap	Assets Assets	1601631000	USD
CY2020Q4	us-gaap	Assets Assets	1054566000	USD
CY2021Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	154636000	USD
CY2020Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	57688000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4903000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	5903000	USD
CY2021Q4	klic	Accrued Expenses And Other Current Liabilities AccruedExpensesAndOtherCurrentLiabilities	161570000	USD
CY2020Q4	klic	Accrued Expenses And Other Current Liabilities AccruedExpensesAndOtherCurrentLiabilities	76762000	USD
CY2021Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	30766000	USD
CY2020Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	17540000	USD
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	351875000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	157893000	USD
CY2021Q4	klic	Deferred Tax Liabilities Net Excluding Other Deferred Tax Assets Noncurrent DeferredTaxLiabilitiesNetExcludingOtherDeferredTaxAssetsNoncurrent	32828000	USD
CY2020Q4	klic	Deferred Tax Liabilities Net Excluding Other Deferred Tax Assets Noncurrent DeferredTaxLiabilitiesNetExcludingOtherDeferredTaxAssetsNoncurrent	33005000	USD
CY2021Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	69422000	USD
CY2020Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	74957000	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	38084000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	18325000	USD
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	14185000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	12392000	USD
CY2021Q4	us-gaap	Liabilities Liabilities	506394000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	296572000	USD
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2021Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	550117000	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	539213000	USD
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	400412000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-3022000	USD
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	394817000	USD
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	948554000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	616119000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	757994000	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	116811000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2521000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	1095237000	USD
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1601631000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1054566000	USD
CY2021	us-gaap	Revenues Revenues	1517664000	USD
CY2020	us-gaap	Revenues Revenues	623176000	USD
CY2019	us-gaap	Revenues Revenues	540052000	USD
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	820678000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	325201000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	285462000	USD
CY2021	us-gaap	Gross Profit GrossProfit	696986000	USD
CY2020	us-gaap	Gross Profit GrossProfit	297975000	USD
CY2019	us-gaap	Gross Profit GrossProfit	254590000	USD
CY2021	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	147061000	USD
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	116007000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	64334000	USD
CY2021	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	137478000	USD
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	123459000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	116169000	USD
CY2021	us-gaap	Operating Expenses OperatingExpenses	284539000	USD
CY2020	us-gaap	Operating Expenses OperatingExpenses	239466000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	232980000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	412447000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	58509000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	21610000	USD
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	2321000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	7541000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	15132000	USD
CY2021	us-gaap	Interest Expense InterestExpense	218000	USD
CY2020	us-gaap	Interest Expense InterestExpense	1716000	USD
CY2019	us-gaap	Interest Expense InterestExpense	2055000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	414550000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	34687000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	47295000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11998000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22910000	USD
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-94000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-36000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-124000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	367161000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	52300000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	11653000	USD
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.92
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.83
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.18
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.78
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.83
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.18
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	62009000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	62828000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	65286000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	63515000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	63359000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	65948000	shares
CY2021	us-gaap	Net Income Loss NetIncomeLoss	367161000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	52300000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	11653000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	672000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	7755000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-6534000	USD
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	0	USD
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CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-22000	USD
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CY2019	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	5000000	USD
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CY2020	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	442000000	USD
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CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	31566000	USD
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CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-145809000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-71318000	USD
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CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	321148000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	362788000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	188127000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	364184000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	218000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	1716000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	1634000	USD
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	51856000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	13271000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	22073000	USD
CY2021	us-gaap	Basis Of Accounting BasisOfAccounting	BASIS OF PRESENTATION<div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">These consolidated financial statements include the accounts of Kulicke and Soffa Industries, Inc. and its subsidiaries (the “Company”), with appropriate elimination of intercompany balances and transactions. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Fiscal Year</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Each of the Company's first three fiscal quarters ends on the Saturday that is 13 weeks after the end of the immediately preceding fiscal quarter. The fourth quarter of each fiscal year ends on the Saturday closest to September 30. In fiscal years consisting of 53 weeks, the fourth quarter will consist of 14 weeks. The 2021, 2020, and 2019 fiscal years ended on October 2, 2021, October 3, 2020 and September 28, 2019, respectively. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Nature of Business</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company designs, manufactures and sells capital equipment and tools as well as services, maintains, repairs and upgrades equipment, all used to assemble semiconductor devices. The Company's operating results depend upon the capital and operating expenditures of semiconductor device manufacturers, integrated device manufacturers, outsourced semiconductor assembly and test providers (“OSATs”), and other electronics manufacturers, including automotive electronics suppliers, worldwide which, in turn, depend on the current and anticipated market demand for semiconductors and products utilizing semiconductors. The semiconductor industry is highly volatile and experiences downturns and slowdowns which can have a severe negative effect on the semiconductor industry's demand for semiconductor capital equipment, including assembly equipment manufactured and sold by the Company and, to a lesser extent, tools, including those sold by the Company. These downturns and slowdowns have in the past adversely affected the Company's operating results. The Company believes such volatility will continue to characterize the industry and the Company's operations in the future.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of consolidated financial statements requires management to make assumptions, estimates and judgments that affect the reported amounts of assets and liabilities, net revenue and expenses during the reporting periods, and disclosures of contingent assets and liabilities as of the date of the consolidated financial statements. On an ongoing basis, management evaluates estimates, including but not limited to, those related to accounts receivable, reserves for excess and obsolete inventory, carrying value and lives of fixed assets, goodwill and intangible assets, the valuation estimates and assessment of impairment and observable price adjustments, income taxes, equity-based compensation expense, and warranties. Management bases its estimates on historical experience and on various other assumptions believed to be reasonable. As a result, management makes judgments regarding the carrying values of the Company's assets and liabilities that are not readily apparent from other sources. Authoritative pronouncements, historical experience and assumptions are used as the basis for making estimates, and on an ongoing basis, management evaluates these estimates. Actual results may differ from these estimates.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Due to the coronavirus (“COVID-19”) pandemic, there has been uncertainty and disruption in the global economy and financial markets. The Company is not aware of any specific event or circumstance that would require an update to its estimates or judgments or a revision of the carrying value of its assets or liabilities as of October 2, 2021. While there was no material impact to our consolidated financial statements as of and for the year ended October 2, 2021, these estimates may change, as new events occur and additional information is obtained, as well as other factors related to COVID-19 that could result in material impacts to our consolidated financial statements in future reporting periods. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company reviews its warranty reserve balances as part of its ongoing policy review. At the start of fiscal 2020, the Company determined there was a need to obtain granular data given uncertainty in sales demand. Accordingly</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:120%">,</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> the Company commenced the collection of granular data over the four fiscal quarters in 2020 to establish a more precise estimate of its warranty reserve. This collection was finalized and the information incorporated in the fourth quarter of fiscal 2020. This resulted in a decrease to the reserve for warranty and an increase in net income by $5.4 million for the fiscal year 2020, as well as an increase to net income per share, basic and diluted, by $0.09 and $0.09, respectively. For further information on warranty reserve, see Notes 14 and 17 below.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:115%">Vulnerability to Certain Concentrations</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Financial instruments which may subject the Company to concentrations of credit risk as of October 2, 2021 and October 3, 2020 consisted primarily of trade receivables. The Company manages credit risk associated with investments by investing its excess cash in highly rated debt instruments of the U.S. government and its agencies, financial institutions, and corporations. The Company has established investment guidelines relative to diversification and maturities designed to maintain safety and liquidity. These guidelines are periodically reviewed and modified as appropriate. The Company does not have any exposure to sub-prime financial instruments or auction rate securities. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company's trade receivables result primarily from the sale of semiconductor equipment, related accessories and replacement parts, and tools to a relatively small number of large manufacturers in a highly concentrated industry. Write-offs of uncollectible accounts have historically not been material. The Company actively monitors its customers' financial strength to reduce the risk of loss, including as a result of COVID-19. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company's products are complex and require raw materials, components and subassemblies having a high degree of reliability, accuracy and performance. The Company relies on subcontractors to manufacture many of these components and subassemblies and it relies on sole source suppliers for some important components and raw material inventory.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Foreign Currency Translation and Remeasurement</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The majority of the Company's business is transacted in U.S. dollars; however, the functional currencies of some of the Company's subsidiaries are their local currencies. In accordance with ASC No. 830, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Foreign Currency Matters</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> (“ASC 830”), for a subsidiary of the Company that has a functional currency other than the U.S. dollar, gains and losses resulting from the translation of the functional currency into U.S. dollars for financial statement presentation are not included in determining net income, but are accumulated in the cumulative translation adjustment account as a separate component of shareholders' equity (accumulated other comprehensive income / (loss)). The tax effect of currency translation adjustments related to unremitted foreign earnings no longer deemed to be indefinitely reinvested outside the U.S. is reflected in the determination of the Company's net income or other comprehensive income ("OCI"). Gains and losses resulting from foreign currency transactions are included in the determination of net income.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company's operations are exposed to changes in foreign currency exchange rates due to transactions denominated in currencies other than the location's functional currency. The Company is also exposed to foreign currency fluctuations that impact the remeasurement of net monetary assets of those operations whose functional currency, the U.S. dollar, differs from their respective local currencies, most notably in Israel, Singapore and Switzerland. In addition to net monetary remeasurement, the Company has exposures related to the translation of subsidiary financial statements from their functional currency, the local currency, into its reporting currency, the U.S. dollar, most notably in the Netherlands, China, Taiwan, Japan and Germany. The Company's U.S. operations also have foreign currency exposure due to net monetary assets denominated in currencies other than the U.S. dollar.</span></div><div style="margin-top:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Derivative Financial Instruments </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company’s primary objective for holding derivative financial instruments is to manage the fluctuation in foreign exchange rates and accordingly is not speculative in nature. The Company’s international operations are exposed to changes in foreign exchange rates as described above. The Company has established a program to monitor the forecasted transaction currency risk to protect against foreign exchange rate volatility. Generally, the Company uses foreign exchange forward contracts in these hedging programs. These instruments, which have maturities of up to twelve months, are recorded at fair value and are included in prepaid expenses and other current assets, or accrued expenses and other current liabilities. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our accounting policy for derivative financial instruments is based on whether they meet the criteria for designation as a cash flow hedge. A designated hedge with exposure to variability in the functional currency equivalent of the future foreign currency cash flows of a forecasted transaction is referred to as a cash flow hedge. The criteria for designating a derivative as a cash flow hedge include the assessment of the instrument’s effectiveness in risk reduction, matching of the derivative instrument to its underlying transaction, and the assessment of the probability that the underlying transaction will occur. For derivatives with cash flow hedge accounting designation, we report the after-tax gain / (loss) from the effective portion of the hedge as a component of accumulated other comprehensive income / (loss) and reclassify it into earnings in the same period in which the hedged transaction affects earnings and in the same line item on the consolidated statement of operations as the impact of the hedged transaction. Derivatives that we designate as cash flow hedges are classified in the consolidated statement of cash flows in the same section as the underlying item, primarily within cash flows from operating activities. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The hedge effectiveness of these derivative instruments is evaluated by comparing the cumulative change in the fair value of the hedge contract with the cumulative change in the fair value of the forecasted cash flows of the hedged item.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If a cash flow hedge is discontinued because it is no longer probable that the original hedged transaction will occur as previously anticipated, the cumulative unrealized gain or loss on the related derivative is reclassified from accumulated other comprehensive income / (loss) into earnings. Subsequent gain / (loss) on the related derivative instrument is recognized into earnings in each period until the instrument matures, is terminated, is re-designated as a qualified cash flow hedge, or is sold. Ineffective portions of cash flow hedges, as well as amounts excluded from the assessment of effectiveness, are recognized in earnings.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Cash Equivalents </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%"> </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company considers all highly liquid investments with original maturities of three months or less when purchased to be cash equivalents. Cash equivalents are measured at fair value based on Level 1 measurement, or quoted market prices, as defined by ASC No. 820, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Fair Value Measurements and Disclosures</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Equity Investments </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company invests in equity securities in companies to promote business and strategic objectives. Equity investments are measured and recorded as follows:</span></div><div style="margin-top:6pt;padding-left:36pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">Equity method investments are equity securities in investees that provide the Company with the ability to exercise significant influence in which it lacks a controlling financial interest. Our proportionate share of the income or loss is recognized on a one-quarter lag and is recorded as share of results of equity-method investee, net of tax.</span></div><div style="margin-top:6pt;padding-left:36pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">Non-marketable equity securities are equity securities without readily determinable fair value that are measured and recorded using a measurement alternative that measures the securities at cost minus impairment, if any, plus or minus changes resulting from qualifying observable price changes. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Allowance for Doubtful Accounts</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company maintains allowances for doubtful accounts for estimated losses resulting from its customers' failure to make required payments. If the financial condition of the Company's customers were to deteriorate, resulting in an impairment of their ability to make payments, including as a result of COVID-19, additional allowances may be required. If global or regional economic conditions deteriorate or political conditions were to change in some of the countries where the Company does business, including as a result of COVID-19, it could have a significant impact on the results of operations, and the Company's ability to realize the full value of its accounts receivable.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Inventories</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Inventories are stated at the lower of cost (on a first-in, first-out basis) or net realizable value. The Company generally provides reserves for obsolete inventory and for inventory considered to be in excess of demand. Demand is generally defined as 18 months forecasted future consumption for equipment, 24 months forecasted future consumption for spare parts, and 12 months forecasted future consumption for tools. Forecasted consumption is based upon internal projections, historical sales volumes, customer order activity and a review of consumable inventory levels at customers' facilities. The Company communicates forecasts of its future consumption to its suppliers and adjusts commitments to those suppliers accordingly. If required, the Company reserves the difference between the carrying value of its inventory and the lower of cost or net realizable value, based upon projections about future consumption, and market conditions. If actual market conditions are less favorable than projections, additional inventory reserves may be required.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Inventory reserve provision for certain subsidiaries is determined based on management's estimate of future consumption for equipment and spare parts. This estimate is based on historical sales volumes, internal projections and market developments and trends. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Property, Plant and Equipment </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Property, plant and equipment are carried at cost. The cost of additions and those improvements which increase the capacity or lengthen the useful lives of assets are capitalized while repair and maintenance costs are expensed as incurred. Depreciation and amortization are provided on a straight-line basis over the estimated useful lives as follows: buildings 25 years; machinery, equipment, furniture and fittings 3 to 10 years; toolings 1 year; and leasehold improvements are based on the shorter of the life of lease or life of asset. Purchased computer software costs related to business and financial systems are amortized over a five-year period on a straight-line basis. Land is not depreciated.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Valuation of Long-Lived Assets </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In accordance with ASC No. 360, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Property, Plant & Equipment</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> ("ASC 360"), the Company's definite lived intangible assets and property, plant and equipment are tested for impairment based on undiscounted cash flows when triggering events occur, and if impaired, written-down to fair value based on either discounted cash flows or appraised values. ASC 360 also provides a single accounting model for long-lived assets to be disposed of by sale and establishes additional criteria that would have to be met to classify an asset as held for sale. The carrying amount of an asset or asset group is not recoverable to the extent it exceeds the sum of the undiscounted cash flows expected to result from the use and eventual disposition of the asset or asset group. Estimates of future cash flows used to test the recoverability of a long-lived asset or asset group must incorporate the entity's own assumptions about its use of the asset or asset group and must factor in all available evidence.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">ASC 360 requires that long-lived assets be tested for recoverability whenever events or changes in circumstances indicate that their carrying amount may not be recoverable. Such events include significant under-performance relative to historical internal forecasts or projected future operating results; significant changes in the manner of use of the assets; significant negative industry or economic trends; or significant changes in market capitalization. During the fiscal years ended October 2, 2021 and October 3, 2020, no "triggering" events occurred. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Accounting for Impairment of Goodwill</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">ASC No. 350, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Intangibles - Goodwill and Other</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> requires goodwill and other intangible assets with indefinite lives to be reviewed for impairment annually, or more frequently if circumstances indicate a possible impairment. We assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If, after assessing the qualitative factors, a company determines that it is not more likely than not that the fair value of a reporting unit is less than its carrying value, then performing the impairment test is unnecessary. However, if a company concludes otherwise, then it is required to perform the goodwill impairment test. The Company's impairment test is performed by comparing the fair value of a reporting unit with its carrying value, and determining if the carrying amount exceeds its fair value. </span></div><div style="margin-bottom:6pt;margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As part of the annual evaluation, the Company performs an impairment test of its goodwill in the fourth quarter of each fiscal year to coincide with the completion of its annual forecasting and refreshing of its business outlook processes. On an ongoing basis, the Company monitors if a “triggering” event has occurred that may have the effect of reducing the fair value of a reporting unit below its respective carrying value. Adverse changes in expected operating results and/or unfavorable changes in other economic factors used to estimate fair values could result in a non-cash impairment charge in the future. </span></div><div style="margin-bottom:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Impairment assessments inherently involve judgment as to the assumptions made about the expected future cash flows and the impact of market conditions on those assumptions. Future events and changing market conditions may impact the assumptions as to prices, costs, growth rates or other factors that may result in changes in the estimates of future cash flows. Although the Company believes the assumptions that it has used in testing for impairment are reasonable, significant changes in any one of the assumptions could produce a significantly different result. Indicators of potential impairment, including significant and unforeseen customer losses, a significant adverse change in legal factors or in the business climate, a significant adverse action or assessment by a regulator, a significant stock price decline or unanticipated competition may lead the Company to perform interim goodwill impairment assessments. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For further information on goodwill and other intangible assets, see Note 4 below.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Revenue Recognition</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In accordance with ASC No. 606, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Revenue from Contracts with Customers</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, the Company recognizes revenue when we satisfy performance obligations as evidenced by the transfer of control of our products or services to customers. In general, the Company generates revenue from product sales, either directly to customers or to distributors. In determining whether a contract exists, we evaluate the terms of the agreement, the relationship with the customer or distributor and their ability to pay.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company recognizes revenue from sales of our products, including sales to our distributors, at a point in time, generally upon shipment or delivery to the customer or distributor, depending upon the terms of the sales order. Control is considered transferred when title and risk of loss pass, when the customer becomes obligated to pay and, where applicable, when the customer has accepted the products or upon expiration of the acceptance period. For sales to distributors, payment is due on our standard commercial terms and is not contingent upon resale of the products.</span></div><div style="margin-bottom:3.3pt;margin-top:6pt;padding-right:2.25pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our business is subject to contingencies related to customer orders, including: </span></div><div style="margin-top:6pt;padding-left:31.5pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;padding-left:14.5pt">Right of Return</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">: A large portion of our revenue comes from the sale of equipment used in the semiconductor assembly process. Other product sales relate to consumable products, which are sold in high-volume quantities, and are generally maintained at low stock levels at the customers' facility. Customer returns have historically represented a very small percentage of customer sales on an annual basis.</span></div><div style="margin-top:6pt;padding-left:31.5pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;padding-left:14.5pt">Warranties</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">: Our equipment is generally shipped with a one-year warranty against manufacturing defects. We establish reserves for estimated warranty expense when revenue for the related equipment is recognized. The reserve for estimated warranty expense is based upon historical experience and management's estimate of future expenses, including product parts replacement, freight charges and labor costs expected to be incurred to correct product failures during the warranty period.</span></div><div style="margin-top:6pt;padding-left:31.5pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;padding-left:14.5pt">Conditions of Acceptance: </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Sales of our consumable products generally do not have customer acceptance terms. In certain cases, sales of our equipment have customer acceptance clauses which may require the equipment to perform in accordance with customer specifications or when installed at the customer's facility. In such cases, if the terms of </span></div><div style="margin-top:6pt;padding-left:31.5pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">acceptance are satisfied at our facility prior to shipment, the revenue for the equipment will be recognized upon shipment. If the terms of acceptance are satisfied at our customers' facilities, the revenue for the equipment will not be recognized until acceptance, which is typically obtained after installation and testing, is received from the customer. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Service revenue is generally recognized over time as the services are performed. For fiscal 2021 and 2020, the service revenue is not material.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company measures revenue based on the amount of consideration we expect to be entitled to in exchange for products or services. Any variable consideration such as sales incentives are recognized as a reduction of net revenue at the time of revenue recognition.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The length of time between invoicing and payment is not significant under our payment terms. In instances where the timing of revenue recognition differs from the timing of invoicing, we have determined our contracts generally do not include a significant financing component. Shipping and handling costs billed to customers are recognized in net revenue. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Shipping and handling costs paid by the Company are included in cost of sales.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Research and Development </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company charges research and development costs associated with the development of new products to expense when incurred. In certain circumstances, pre-production machines that the Company intends to sell are carried as inventory until sold.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Income Taxes</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In accordance with ASC No. 740, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Income Taxes</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, deferred income taxes are determined using the balance sheet method</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">. </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company records a valuation allowance to reduce its deferred tax assets to the amount expected, on a more likely than not basis, to be realized. While the Company has considered future taxable income and ongoing tax planning strategies in assessing the need for the valuation allowance, if it were to determine that it would be able to realize its deferred tax assets in the future in excess of its net recorded amount, an adjustment to deferred tax assets would increase income in the period when such determination is made. Likewise, should the Company determine it would not be able to realize all or part of its deferred tax assets in the future, an adjustment to deferred tax assets would decrease income in the period when such determination is made.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company determines the amount of unrecognized tax benefit with respect to uncertain tax positions taken or expected to be taken on its income tax returns in accordance with ASC No. 740 Topic 10, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Income Taxes, General </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">(“ASC 740.10”). Under ASC 740.10, the Company utilizes a two-step approach for evaluating uncertain tax positions. Step one, or recognition, requires a company to determine if the weight of available evidence indicates a tax position is more likely than not to be sustained upon examination solely based on its technical merit. Step two, or measurement, is based on the largest amount of benefit, which is more likely than not to be realized on settlement with the taxing authority, including resolution of related appeals or litigation processes, if any.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Equity-Based Compensation </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company accounts for equity-based compensation under the provisions of ASC No. 718,</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"> Compensation - Stock Compensation</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> (“ASC 718”). ASC 718 requires the recognition of the fair value of the equity-based compensation in net income. Compensation expense associated with Relative TSR Performance Share Units is determined using a Monte-Carlo valuation model, and compensation expense associated with time-based and Growth Performance Share Units is determined based on the number of shares granted and the fair value on the date of grant. See Note 11 for a summary of the terms of these performance-based awards. The fair value of the Company's stock option awards is estimated using a Black-Scholes option valuation model. The fair value of equity-based awards is amortized over the vesting period of the award, and the Company elected to use the straight-line method for awards granted after the adoption of ASC 718.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Earnings per Share </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Earnings per share (“EPS”) are calculated in accordance with ASC No. 260,</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"> Earnings per Share</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">. Basic EPS include only the weighted average number of common shares outstanding during the period. Diluted EPS include the weighted average number of common shares and the dilutive effect of stock options, restricted stock awards, performance share units and restricted share units outstanding during the period, when such instruments are dilutive.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Accounting for Business Acquisitions</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company accounts for business acquisitions in accordance with ASC No. 805,</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"> Business Combinations</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">. The fair value of the net assets acquired and the results of operations of the acquired businesses are included in the consolidated financial statements from the acquisition date forward. The Company is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and results of operations during the reporting period. Estimates are used in accounting </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">for, among other things, the fair value of acquired net operating assets, property, plant and equipment, deferred revenue, intangible assets and related deferred income taxes, useful lives of property, plant and equipment, and amortizable lives of acquired intangible assets. Any excess of the purchase consideration over the identified fair value of the assets and liabilities assumed is recognized as goodwill. The valuation of these tangible and identifiable intangible assets and liabilities is subject to further management review and may change materially between the preliminary allocation and end of the purchase price allocation period.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Restructuring Charges</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Restructuring charges may consist of voluntary or involuntary severance-related charges, asset-related charges and other costs due to exit activities. We recognize voluntary termination benefits when an employee accepts the offered benefit arrangement. We recognize involuntary severance-related charges depending on whether the termination benefits are provided under an ongoing benefit arrangement or under a one-time benefit arrangement. If the former, we recognize the charges once they are probable and the amounts are estimable. If the latter, we recognize the charges once the benefits have been communicated to employees.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Recent Accounting Pronouncements</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Financial Instruments</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In June 2016, the FASB issued ASU 2016-13, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">. This ASU replaces the impairment methodology in current GAAP, which delays recognition of credit losses until it is probable a loss has been incurred, with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. We adopted this ASU in the first quarter of fiscal 2021. The adoption of this ASU did not have a material impact on our consolidated financial statements.</span></div><div style="margin-top:6pt;text-align:justify"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Collaborative Arrangements</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In November 2018, the FASB issued ASU 2018-18, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Collaborative Arrangements</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> (Topic 808). This ASU clarifies that certain transactions between collaborative arrangement participants should be accounted for as revenue when the collaborative arrangement participant is a customer in the context of a unit of account and precludes recognizing as revenue consideration received from a collaborative arrangement participant if the participant is not a customer. This ASU requires retrospective adoption to the date we adopted ASC 606 by recognizing a cumulative-effect adjustment to the opening balance of retained earnings of the earliest annual period presented. We adopted this ASU in the first quarter of fiscal 2021. The adoption of this ASU did not have a material impact on our consolidated financial statements.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Income Taxes</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In December 2019, the FASB issued ASU 2019-12, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Income Taxes</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> (Topic 740). The amendments in this ASU simplify the accounting for income taxes by removing certain exceptions to the general principles in Topic 740 and clarify and amend existing guidance. This ASU will be effective for us in the first quarter of 2022. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements.</span></div>
CY2021	us-gaap	Fiscal Period FiscalPeriod	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Fiscal Year</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span>Each of the Company's first three fiscal quarters ends on the Saturday that is 13 weeks after the end of the immediately preceding fiscal quarter. The fourth quarter of each fiscal year ends on the Saturday closest to September 30. In fiscal years consisting of 53 weeks, the fourth quarter will consist of 14 weeks. The 2021, 2020, and 2019 fiscal years ended on October 2, 2021, October 3, 2020 and September 28, 2019, respectively.
CY2020	klic	Increase Decrease In Earnings Per Share Basic IncreaseDecreaseInEarningsPerShareBasic	0.09
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of consolidated financial statements requires management to make assumptions, estimates and judgments that affect the reported amounts of assets and liabilities, net revenue and expenses during the reporting periods, and disclosures of contingent assets and liabilities as of the date of the consolidated financial statements. On an ongoing basis, management evaluates estimates, including but not limited to, those related to accounts receivable, reserves for excess and obsolete inventory, carrying value and lives of fixed assets, goodwill and intangible assets, the valuation estimates and assessment of impairment and observable price adjustments, income taxes, equity-based compensation expense, and warranties. Management bases its estimates on historical experience and on various other assumptions believed to be reasonable. As a result, management makes judgments regarding the carrying values of the Company's assets and liabilities that are not readily apparent from other sources. Authoritative pronouncements, historical experience and assumptions are used as the basis for making estimates, and on an ongoing basis, management evaluates these estimates. Actual results may differ from these estimates.</span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Due to the coronavirus (“COVID-19”) pandemic, there has been uncertainty and disruption in the global economy and financial markets. The Company is not aware of any specific event or circumstance that would require an update to its estimates or judgments or a revision of the carrying value of its assets or liabilities as of October 2, 2021. While there was no material impact to our consolidated financial statements as of and for the year ended October 2, 2021, these estimates may change, as new events occur and additional information is obtained, as well as other factors related to COVID-19 that could result in material impacts to our consolidated financial statements in future reporting periods. </span></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company reviews its warranty reserve balances as part of its ongoing policy review. At the start of fiscal 2020, the Company determined there was a need to obtain granular data given uncertainty in sales demand. Accordingly</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:120%">,</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> the Company commenced the collection of granular data over the four fiscal quarters in 2020 to establish a more precise estimate of its warranty reserve. This collection was finalized and the information incorporated in the fourth quarter of fiscal 2020. This resulted in a decrease to the reserve for warranty and an increase in net income by $5.4 million for the fiscal year 2020, as well as an increase to net income per share, basic and diluted, by $0.09 and $0.09, respectively. For further information on warranty reserve, see Notes 14 and 17 below.</span></div>
CY2020	klic	Change In Warranty Reserve Methodology ChangeInWarrantyReserveMethodology	5400000	USD
CY2020	klic	Increase Decrease In Earnings Per Share Diluted IncreaseDecreaseInEarningsPerShareDiluted	0.09
CY2021Q4	us-gaap	Short Term Investments ShortTermInvestments	377000000	USD
CY2020Q4	us-gaap	Short Term Investments ShortTermInvestments	342000000	USD
CY2021Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	94493000	USD
CY2020Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	60205000	USD
CY2021Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	55866000	USD
CY2020Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	39753000	USD
CY2021Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	40006000	USD
CY2020Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	43015000	USD
CY2021Q4	us-gaap	Inventory Gross InventoryGross	190365000	USD
CY2020Q4	us-gaap	Inventory Gross InventoryGross	142973000	USD
CY2021Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	23042000	USD
CY2020Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	31164000	USD
CY2021Q4	us-gaap	Inventory Net InventoryNet	167323000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	111809000	USD
CY2021Q4	us-gaap	Land Land	2182000	USD
CY2020Q4	us-gaap	Land Land	2182000	USD
CY2021Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	23314000	USD
CY2020Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	22830000	USD
CY2021Q4	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	30054000	USD
CY2020Q4	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	23111000	USD
CY2021Q4	klic	Equipment And Software Gross EquipmentAndSoftwareGross	40945000	USD
CY2020Q4	klic	Equipment And Software Gross EquipmentAndSoftwareGross	38524000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	87994000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	80953000	USD
CY2021Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	9562000	USD
CY2020Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	7111000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	194051000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	174711000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	126069000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	115564000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	67982000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	59147000	USD
CY2021Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	72478000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	22759000	USD
CY2021Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	66531000	USD
CY2020Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	7397000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	37237000	USD
CY2021Q4	klic	Accrued Liabilities For Commission And Professional Fees Current AccruedLiabilitiesForCommissionAndProfessionalFeesCurrent	6190000	USD
CY2020Q4	klic	Accrued Liabilities For Commission And Professional Fees Current AccruedLiabilitiesForCommissionAndProfessionalFeesCurrent	2716000	USD
CY2021Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	8673000	USD
CY2021Q4	us-gaap	Supplemental Unemployment Benefits Severance Benefits SupplementalUnemploymentBenefitsSeveranceBenefits	31000	USD
CY2020Q4	us-gaap	Supplemental Unemployment Benefits Severance Benefits SupplementalUnemploymentBenefitsSeveranceBenefits	449000	USD
CY2021Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	7667000	USD
CY2020Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	6204000	USD
CY2021Q4	klic	Accrued Expenses And Other Current Liabilities AccruedExpensesAndOtherCurrentLiabilities	161570000	USD
CY2020Q4	klic	Accrued Expenses And Other Current Liabilities AccruedExpensesAndOtherCurrentLiabilities	76762000	USD
CY2021	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	-545000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	72949000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	56695000	USD
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	16799000	USD
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	42752000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	37972000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	6357000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	6258000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	6258000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	6258000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	6258000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	11363000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	42752000	USD
CY2021Q4	us-gaap	Cash Cash	269201000	USD
CY2021Q4	klic	Cashand Cash Equivalents Amortized Cost CashandCashEquivalentsAmortizedCost	362806000	USD
CY2021Q4	klic	Cashand Cash Equivalents Gross Unrealized Gain CashandCashEquivalentsGrossUnrealizedGain	0	USD
CY2021Q4	klic	Cashand Cash Equivalents Gross Unrealized Loss CashandCashEquivalentsGrossUnrealizedLoss	18000	USD
CY2021Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	362788000	USD
CY2021Q4	us-gaap	Short Term Investments ShortTermInvestments	377000000	USD
CY2021Q4	klic	Availableforsale Securities Shortterm Investments Gross Unrealized Gain AvailableforsaleSecuritiesShorttermInvestmentsGrossUnrealizedGain	0	USD
CY2021Q4	klic	Availableforsale Securities Shortterm Investments Gross Unrealized Loss AvailableforsaleSecuritiesShorttermInvestmentsGrossUnrealizedLoss	0	USD
CY2021Q4	klic	Availableforsale Securities Shortterm Investments Fair Value Disclosure AvailableforsaleSecuritiesShorttermInvestmentsFairValueDisclosure	377000000	USD
CY2021Q4	klic	Cash Cash Equivalents Restricted Cash Restricted Cash Equivalentsand Short Term Investments CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsandShortTermInvestments	739806000	USD
CY2021Q4	klic	Cash Cash Equivalents Restricted Cash Restricted Cash Equivalentsand Short Term Investments Gross Unrealized Gain CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsandShortTermInvestmentsGrossUnrealizedGain	0	USD
CY2021Q4	klic	Cash Cash Equivalents Restricted Cash Restricted Cash Equivalentsand Short Term Investments Gross Unrealized Loss CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsandShortTermInvestmentsGrossUnrealizedLoss	18000	USD
CY2021Q4	klic	Cash Cash Equivalents Restricted Cash Restricted Cash Equivalentsand Short Term Investments Fair Value Disclosure CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsandShortTermInvestmentsFairValueDisclosure	739788000	USD
CY2020Q4	us-gaap	Cash Cash	42997000	USD
CY2020Q4	klic	Cashand Cash Equivalents Amortized Cost CashandCashEquivalentsAmortizedCost	188137000	USD
CY2020Q4	klic	Cashand Cash Equivalents Gross Unrealized Gain CashandCashEquivalentsGrossUnrealizedGain	0	USD
CY2020Q4	klic	Cashand Cash Equivalents Gross Unrealized Loss CashandCashEquivalentsGrossUnrealizedLoss	10000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	188127000	USD
CY2020Q4	us-gaap	Short Term Investments ShortTermInvestments	342000000	USD
CY2020Q4	klic	Availableforsale Securities Shortterm Investments Gross Unrealized Gain AvailableforsaleSecuritiesShorttermInvestmentsGrossUnrealizedGain	0	USD
CY2020Q4	klic	Availableforsale Securities Shortterm Investments Gross Unrealized Loss AvailableforsaleSecuritiesShorttermInvestmentsGrossUnrealizedLoss	0	USD
CY2020Q4	klic	Availableforsale Securities Shortterm Investments Fair Value Disclosure AvailableforsaleSecuritiesShorttermInvestmentsFairValueDisclosure	342000000	USD
CY2020Q4	klic	Cash Cash Equivalents Restricted Cash Restricted Cash Equivalentsand Short Term Investments CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsandShortTermInvestments	530137000	USD
CY2020Q4	klic	Cash Cash Equivalents Restricted Cash Restricted Cash Equivalentsand Short Term Investments Gross Unrealized Gain CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsandShortTermInvestmentsGrossUnrealizedGain	0	USD
CY2020Q4	klic	Cash Cash Equivalents Restricted Cash Restricted Cash Equivalentsand Short Term Investments Gross Unrealized Loss CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsandShortTermInvestmentsGrossUnrealizedLoss	10000	USD
CY2020Q4	klic	Cash Cash Equivalents Restricted Cash Restricted Cash Equivalentsand Short Term Investments Fair Value Disclosure CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsandShortTermInvestmentsFairValueDisclosure	530127000	USD
CY2021Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	6388000	USD
CY2020Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	6321000	USD
CY2021Q4	us-gaap	Equity Method Investments EquityMethodInvestments	0	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y6M
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.058
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.048
CY2020Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1214000	USD
CY2021Q4	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	6388000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	7535000	USD
CY2021Q1	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	1000000	USD
CY2021Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	57682000	USD
CY2020Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	37264000	USD
CY2021	us-gaap	Derivative Instruments Gain Loss Reclassification From Accumulated Oci To Income Estimate Of Time To Transfer1 DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimateOfTimeToTransfer1	P12M
CY2021	klic	Lessee Operating Lease Number Of Renewal Options LesseeOperatingLeaseNumberOfRenewalOptions	3	renewal_option
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	7629000	USD
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	6942000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	7211000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	6296000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y7M6D
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	7249000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	6621000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	6224000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	5903000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	5085000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	26372000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	57454000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	14467000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	42987000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4903000	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	38084000	USD
CY2021	klic	Defined Benefit Plan Employer Contribution Percentage Match Of Compensation DefinedBenefitPlanEmployerContributionPercentageMatchOfCompensation	employee contributions and matching Company contributions from 4% to 6%
CY2021	us-gaap	Pension Contributions PensionContributions	1780000	USD
CY2020	us-gaap	Pension Contributions PensionContributions	1514000	USD
CY2018Q3	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	200000000	USD
CY2019Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	300000000	USD
CY2020Q3	klic	Increase Decrease In Stock Repurchase Program Authorized Amount IncreaseDecreaseInStockRepurchaseProgramAuthorizedAmount	100000000	USD
CY2020Q3	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	400000000	USD
CY2021	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	215000.0	shares
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	10200000	USD
CY2021Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	132000000	USD
CY2020Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.56
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	682000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	10000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	3088000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	3088000	USD
CY2021Q4	us-gaap	Aoci Loss Cash Flow Hedge Cumulative Gain Loss After Tax AociLossCashFlowHedgeCumulativeGainLossAfterTax	-616000	USD
CY2020Q4	us-gaap	Aoci Loss Cash Flow Hedge Cumulative Gain Loss After Tax AociLossCashFlowHedgeCumulativeGainLossAfterTax	557000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-3022000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2521000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	15502000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	15019000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	14332000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	15502000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	15019000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	14332000	USD
CY2020Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	2958000	USD
CY2019Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	1896000	USD
CY2021	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	-59368000	USD
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	-25207000	USD
CY2021	klic	Contractwith Customer Liability Increase Decrease Additions ContractwithCustomerLiabilityIncreaseDecreaseAdditions	72006000	USD
CY2020	klic	Contractwith Customer Liability Increase Decrease Additions ContractwithCustomerLiabilityIncreaseDecreaseAdditions	26269000	USD
CY2021Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	15596000	USD
CY2020Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	2958000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	367161000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	367161000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	52300000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	52300000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	11653000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	11653000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	62009000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	62009000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	62828000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	62828000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	65286000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	65286000	shares
CY2021	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	1506000	USD
CY2020	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	531000	USD
CY2019	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	662000	USD
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	63515000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	63359000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	65948000	shares
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.92
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.92
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.83
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.83
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.18
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.18
CY2021	klic	Earnings Per Share Diluted Adjustment EarningsPerShareDilutedAdjustment	-0.14
CY2020	klic	Earnings Per Share Diluted Adjustment EarningsPerShareDilutedAdjustment	0
CY2019	klic	Earnings Per Share Diluted Adjustment EarningsPerShareDilutedAdjustment	0
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.78
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.83
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.18
CY2021	klic	Selling General And Administrative Incentive Compensation Expense SellingGeneralAndAdministrativeIncentiveCompensationExpense	39779000	USD
CY2020	klic	Selling General And Administrative Incentive Compensation Expense SellingGeneralAndAdministrativeIncentiveCompensationExpense	18524000	USD
CY2019	klic	Selling General And Administrative Incentive Compensation Expense SellingGeneralAndAdministrativeIncentiveCompensationExpense	423000	USD
CY2021	klic	Warranty And Retrofit Expense WarrantyAndRetrofitExpense	22068000	USD
CY2020	klic	Warranty And Retrofit Expense WarrantyAndRetrofitExpense	8692000	USD
CY2019	klic	Warranty And Retrofit Expense WarrantyAndRetrofitExpense	13030000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-8853000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-14909000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-14125000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	423403000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	79243000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	48812000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	414550000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	64334000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	34687000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	26563000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	5129000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6580000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	261000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	89000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	214000	USD
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	30771000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	6508000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	6384000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2979000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-690000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2959000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-7321000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	962000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	6773000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	47295000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11998000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22910000	USD
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	86915000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	13510000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	7284000	USD
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-15028000	USD
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-1634000	USD
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-4335000	USD
CY2021	klic	Income Tax Reconciliation Benefits From Foreign Approved Enterprises IncomeTaxReconciliationBenefitsFromForeignApprovedEnterprises	45501000	USD
CY2020	klic	Income Tax Reconciliation Benefits From Foreign Approved Enterprises IncomeTaxReconciliationBenefitsFromForeignApprovedEnterprises	6781000	USD
CY2019	klic	Income Tax Reconciliation Benefits From Foreign Approved Enterprises IncomeTaxReconciliationBenefitsFromForeignApprovedEnterprises	5084000	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	2705000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	2915000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	3041000	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Foreign IncomeTaxReconciliationTaxCreditsForeign	20281000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Foreign IncomeTaxReconciliationTaxCreditsForeign	1701000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Foreign IncomeTaxReconciliationTaxCreditsForeign	22744000	USD
CY2021	klic	Effective Income Tax Rate Reconciliation Tax Cutand Jobs Act2017 Transition Tax EffectiveIncomeTaxRateReconciliationTaxCutandJobsAct2017TransitionTax	0	USD
CY2020	klic	Effective Income Tax Rate Reconciliation Tax Cutand Jobs Act2017 Transition Tax EffectiveIncomeTaxRateReconciliationTaxCutandJobsAct2017TransitionTax	0	USD
CY2019	klic	Effective Income Tax Rate Reconciliation Tax Cutand Jobs Act2017 Transition Tax EffectiveIncomeTaxRateReconciliationTaxCutandJobsAct2017TransitionTax	9369000	USD
CY2021	klic	Effective Income Tax Rate Reconciliation Tax Cutand Jobs Act2017 Deferred Tax Assets EffectiveIncomeTaxRateReconciliationTaxCutandJobsAct2017DeferredTaxAssets	0	USD
CY2020	klic	Effective Income Tax Rate Reconciliation Tax Cutand Jobs Act2017 Deferred Tax Assets EffectiveIncomeTaxRateReconciliationTaxCutandJobsAct2017DeferredTaxAssets	-145000	USD
CY2019	klic	Effective Income Tax Rate Reconciliation Tax Cutand Jobs Act2017 Deferred Tax Assets EffectiveIncomeTaxRateReconciliationTaxCutandJobsAct2017DeferredTaxAssets	5480000	USD
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-11620000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	1224000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	25289000	USD
CY2021	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	52414000	USD
CY2020	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	8886000	USD
CY2019	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	8578000	USD
CY2021	klic	Reserve For Uncertain Tax Positions ReserveForUncertainTaxPositions	-180000	USD
CY2020	klic	Reserve For Uncertain Tax Positions ReserveForUncertainTaxPositions	285000	USD
CY2019	klic	Reserve For Uncertain Tax Positions ReserveForUncertainTaxPositions	156000	USD
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	113000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	1232000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	2248000	USD
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	3168000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	37000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-290000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	47295000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11998000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22910000	USD
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.114
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.186
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.660
CY2020	klic	Cumulative Tax Effects Of Jusrisdictional Adjustments CumulativeTaxEffectsOfJusrisdictionalAdjustments	3500000	USD
CY2021	klic	Tax Incentive Arrangement Income Tax Benefit TaxIncentiveArrangementIncomeTaxBenefit	45500000	USD
CY2021	klic	Tax Incentive Arrangement Income Tax Provision Benefit Earnings Per Share Impact TaxIncentiveArrangementIncomeTaxProvisionBenefitEarningsPerShareImpact	-0.72
CY2020	klic	Tax Incentive Arrangement Income Tax Benefit TaxIncentiveArrangementIncomeTaxBenefit	6800000	USD
CY2020	klic	Tax Incentive Arrangement Income Tax Provision Benefit Earnings Per Share Impact TaxIncentiveArrangementIncomeTaxProvisionBenefitEarningsPerShareImpact	-0.11
CY2019	klic	Tax Incentive Arrangement Income Tax Benefit TaxIncentiveArrangementIncomeTaxBenefit	5000000	USD
CY2019	klic	Tax Incentive Arrangement Income Tax Provision Benefit Earnings Per Share Impact TaxIncentiveArrangementIncomeTaxProvisionBenefitEarningsPerShareImpact	-0.08
CY2021Q4	klic	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Inventory Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsInventoryReserves	11890000	USD
CY2020Q4	klic	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Inventory Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsInventoryReserves	7631000	USD
CY2021Q4	klic	Deferred Tax Assets Tax Credit Carryforwards Domestic DeferredTaxAssetsTaxCreditCarryforwardsDomestic	4230000	USD
CY2020Q4	klic	Deferred Tax Assets Tax Credit Carryforwards Domestic DeferredTaxAssetsTaxCreditCarryforwardsDomestic	6124000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	28913000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	37921000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	45033000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	51676000	USD
CY2021Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	34095000	USD
CY2020Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	46561000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	10938000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	5115000	USD
CY2021Q4	klic	Deferred Tax Liabilities Repatriation Of Foreign Earnings Including Foreign Withholding Taxes DeferredTaxLiabilitiesRepatriationOfForeignEarningsIncludingForeignWithholdingTaxes	28516000	USD
CY2020Q4	klic	Deferred Tax Liabilities Repatriation Of Foreign Earnings Including Foreign Withholding Taxes DeferredTaxLiabilitiesRepatriationOfForeignEarningsIncludingForeignWithholdingTaxes	25676000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	465000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4297000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	28051000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	29973000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	17113000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	24858000	USD
CY2021Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	15715000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	8147000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	32828000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	33005000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	17113000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	24858000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	72800000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	104400000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	6800000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	13064000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	12925000	USD
CY2018Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	13038000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	4003000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	537000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	410000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2145000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	398000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	523000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	14922000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	13064000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	12925000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1700000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	15200000	USD
CY2021	us-gaap	Revenues Revenues	1517664000	USD
CY2020	us-gaap	Revenues Revenues	623176000	USD
CY2019	us-gaap	Revenues Revenues	540052000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	412447000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	58509000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	21610000	USD
CY2021	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	22555000	USD
CY2020	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	14514000	USD
CY2019	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	11829000	USD
CY2021	us-gaap	Depreciation Depreciation	13836000	USD
CY2020	us-gaap	Depreciation Depreciation	12368000	USD
CY2019	us-gaap	Depreciation Depreciation	12892000	USD
CY2021	us-gaap	Adjustment For Amortization AdjustmentForAmortization	5974000	USD
CY2020	us-gaap	Adjustment For Amortization AdjustmentForAmortization	7371000	USD
CY2019	us-gaap	Adjustment For Amortization AdjustmentForAmortization	7412000	USD
CY2021	us-gaap	Revenues Revenues	1517664000	USD
CY2020	us-gaap	Revenues Revenues	623176000	USD
CY2019	us-gaap	Revenues Revenues	540052000	USD
CY2021Q4	us-gaap	Noncurrent Assets NoncurrentAssets	118324000	USD
CY2020Q4	us-gaap	Noncurrent Assets NoncurrentAssets	91556000	USD
CY2019Q3	us-gaap	Noncurrent Assets NoncurrentAssets	81113000	USD
CY2020Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	9576000	USD
CY2019Q3	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	14185000	USD
CY2018Q3	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	14474000	USD
CY2021	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	18889000	USD
CY2020	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	14004000	USD
CY2019	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	12140000	USD
CY2021	klic	Change In Warranty Reserve Methodology ChangeInWarrantyReserveMethodology	0	USD
CY2020	klic	Change In Warranty Reserve Methodology ChangeInWarrantyReserveMethodology	5417000	USD
CY2019	klic	Change In Warranty Reserve Methodology ChangeInWarrantyReserveMethodology	0	USD
CY2021	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	11504000	USD
CY2020	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	13196000	USD
CY2019	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	12429000	USD
CY2021Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	16961000	USD
CY2020Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	9576000	USD
CY2019Q3	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	14185000	USD
CY2021Q4	klic	Inventory Purchase Obligation Future Minimum Payments Due InventoryPurchaseObligationFutureMinimumPaymentsDue	591845000	USD
CY2021Q4	klic	Inventory Purchase Obligation Future Minimum Payments Due Current InventoryPurchaseObligationFutureMinimumPaymentsDueCurrent	591845000	USD
CY2021Q4	klic	Inventory Purchase Obligation Future Minimum Payments Due In Two Years InventoryPurchaseObligationFutureMinimumPaymentsDueInTwoYears	0	USD
CY2021Q4	klic	Inventory Purchase Obligation Future Minimum Payments Due In Three Years InventoryPurchaseObligationFutureMinimumPaymentsDueInThreeYears	0	USD
CY2021Q4	klic	Inventory Purchase Obligation Future Minimum Payments Due In Four Years InventoryPurchaseObligationFutureMinimumPaymentsDueInFourYears	0	USD
CY2021Q4	klic	Inventory Purchase Obligation Future Minimum Payments Due Thereafter InventoryPurchaseObligationFutureMinimumPaymentsDueThereafter	0	USD

Files In Submission

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exhibit3212021.htm	Edgar Link	pending
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report.css	Edgar Link	pending
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$KLIC
KULICKE & SOFFA INDUSTRIES INC Stock $klic

2021 Q4 Form 10-K Financial Statement

#000005697821000153 Filed on November 18, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KLIC KULICKE & SOFFA INDUSTRIES INC Stock $klic

2021 Q4 Form 10-K Financial Statement

#000005697821000153 Filed on November 18, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KLIC
KULICKE & SOFFA INDUSTRIES INC Stock $klic