XML 56 R45.htm IDEA: XBRL DOCUMENT
v3.25.2

CASH, CASH EQUIVALENTS, RESTRICTED CASH AND SHORT-TERM INVESTMENTS (Details) - USD ($) $ in Thousands | Jun. 28, 2025 | Sep. 28, 2024
--- | --- | ---
Cash, Cash Equivalents, Restricted Cash and Short-Term Investments [Line Items] |  |
Cash, Amortized Cost | $ 52,991 | $ 26,800
Cash, Unrealized Gains | 0 | 0
Cash, Unrealized Losses | 0 | 0
Cash, Estimated Fair Value | 52,991 | 26,800
Cash and Cash Equivalents, Amortized Cost | 246,409 | 227,058
Cash and Cash Equivalents, Unrealized Gain | 72 | 89
Cash and Cash Equivalents, Unrealized Loss | 0 | 0
Cash and Cash Equivalents, Estimated Fair Value | 246,481 | 227,147
Short-term investments, Amortized Cost | 310,000 | 350,000
Short-term Investments, Unrealized Gain | 0 | 0
Short-term Investments, Unrealized Loss | 0 | 0
Short-term Investments, Estimated Fair Value | 310,000 | 350,000
Cash, Cash Equivalents, Restricted Cash, and Short-Term Investments, Amortized Cost | 556,409 | 577,058
Cash, Cash Equivalents, Restricted Cash, and Short-Term Investments, Unrealized Gain | 72 | 89
Cash, Cash Equivalents, Restricted Cash, and Short-Term Investments, Unrealized Loss | 0 | 0
Cash, Cash Equivalents, Restricted Cash, and Short-Term Investments, Estimated Fair Value | 556,481 | 577,147
Mutual Funds |  |
Cash, Cash Equivalents, Restricted Cash and Short-Term Investments [Line Items] |  |
Cash Equivalents, Amortized Cost | 156,853 | 157,590
Cash Equivalents, Unrealized Gain | 72 | 89
Cash Equivalents, Unrealized Loss | 0 | 0
Cash Equivalents, Estimated Fair Value | 156,925 | 157,679
Time deposits |  |
Cash, Cash Equivalents, Restricted Cash and Short-Term Investments [Line Items] |  |
Cash Equivalents, Amortized Cost | 36,565 | 42,668
Cash Equivalents, Unrealized Gain | 0 | 0
Cash Equivalents, Unrealized Loss | 0 | 0
Cash Equivalents, Estimated Fair Value | 36,565 | 42,668
Short-term investments, Amortized Cost | 310,000 | 350,000
Short-term Investments, Unrealized Gain | 0 | 0
Short-term Investments, Unrealized Loss | 0 | 0
Short-term Investments, Estimated Fair Value | $ 310,000 | $ 350,000

X
- Definition Available-for-sale Securities, Short-term Investments, Fair Value Disclosure + References No definition available. + Details
Name: | klic_AvailableforsaleSecuritiesShorttermInvestmentsFairValueDisclosure
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Available-for-sale Securities, Short-term Investments, Gross Unrealized Gain + References No definition available. + Details
Name: | klic_AvailableforsaleSecuritiesShorttermInvestmentsGrossUnrealizedGain
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Available-for-sale Securities, Short-term Investments, Gross Unrealized Loss + References No definition available. + Details
Name: | klic_AvailableforsaleSecuritiesShorttermInvestmentsGrossUnrealizedLoss
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash, Cash Equivalents, Restricted Cash, Restricted Cash Equivalents, and Short-Term Investments + References No definition available. + Details
Name: | klic_CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsandShortTermInvestments
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash, Cash Equivalents, Restricted Cash, Restricted Cash Equivalents, and Short-Term Investments, Fair Value Disclosure + References No definition available. + Details
Name: | klic_CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsandShortTermInvestmentsFairValueDisclosure
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash, Cash Equivalents, Restricted Cash, Restricted Cash Equivalents, and Short-Term Investments, Gross Unrealized Gain + References No definition available. + Details
Name: | klic_CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsandShortTermInvestmentsGrossUnrealizedGain
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash, Cash Equivalents, Restricted Cash, Restricted Cash Equivalents, and Short-Term Investments, Gross Unrealized Loss + References No definition available. + Details
Name: | klic_CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsandShortTermInvestmentsGrossUnrealizedLoss
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash Equivalents, Amortized Cost + References No definition available. + Details
Name: | klic_CashEquivalentsAmortizedCost
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash Equivalents, Fair Value Disclosure + References No definition available. + Details
Name: | klic_CashEquivalentsFairValueDisclosure
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash Equivalents, Gross Unrealized Gain + References No definition available. + Details
Name: | klic_CashEquivalentsGrossUnrealizedGain
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash Equivalents, Gross Unrealized Loss + References No definition available. + Details
Name: | klic_CashEquivalentsGrossUnrealizedLoss
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash, Estimated Fair Value + References No definition available. + Details
Name: | klic_CashEstimatedFairValue
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash, Unrealized Gains + References No definition available. + Details
Name: | klic_CashUnrealizedGains
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash, Unrealized Losses + References No definition available. + Details
Name: | klic_CashUnrealizedLosses
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash and Cash Equivalents, Amortized Cost + References No definition available. + Details
Name: | klic_CashandCashEquivalentsAmortizedCost
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash and Cash Equivalents, Gross Unrealized Gain + References No definition available. + Details
Name: | klic_CashandCashEquivalentsGrossUnrealizedGain
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash and Cash Equivalents, Gross Unrealized Loss + References No definition available. + Details
Name: | klic_CashandCashEquivalentsGrossUnrealizedLoss
Namespace Prefix: | klic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477548/944-605-55-14 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 55 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477548/944-605-55-11 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481372/852-10-55-10 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479168/946-830-55-12 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 45 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477796/946-210-45-21 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 20 -SubTopic 210 -Topic 946 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477796/946-210-45-20 + Details
Name: | us-gaap_Cash
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(8)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_ShortTermInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_MutualFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_BankTimeDepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |