DESCRIPTION OF THE PLAN (Details) - EBP 002	12 Months Ended
Dec. 31, 2025 yr
EBP, Description of Plan [Line Items]
Requisite minimum age	18 years
Requisite service period	12 months
Participant contribution	85.00%
Automatic deferral rate	4.00%
Age eligible for catch up contributions	50
Employer contribution, matching percentage	100.00%
Employer contribution, participant compensation matched, percentage	4.00%
Employer contribution vesting percentage	100.00%
EBP, employees with 15 or more years of vesting service prior to January 1, 2011
EBP, Description of Plan [Line Items]
Employer contribution, matching percentage	100.00%
Employer contribution, participant compensation matched, percentage	6.00%
Employer contribution vesting service period	15 years
EBP, Employer Contribution, Tranche One
EBP, Description of Plan [Line Items]
Employer contribution vesting service period	1 year
Employer contribution vesting percentage	50.00%
EBP, Employer Contribution, Tranche Two
EBP, Description of Plan [Line Items]
Employer contribution vesting service period	2 years
Employer contribution vesting percentage	100.00%

EBP, Catch Up Contributions, Age Eligible

No definition available.

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Namespace Prefix:	klic_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Employer Contribution Vesting Service Period

+ References

No definition available.

+ Details

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Namespace Prefix:	klic_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Contribution Vesting Percentage

+ References

No definition available.

+ Details

Name:	klic_EBPParticipantContributionVestingPercentage
Namespace Prefix:	klic_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Requisite Minimum Age

+ References

No definition available.

+ Details

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Namespace Prefix:	klic_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Requisite Service Period

+ References

No definition available.

+ Details

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Namespace Prefix:	klic_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of maximum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute to total pretax annual compensation.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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Balance Type:
Period Type: