This amount represents the combined annual rent and service charges for the maximum range of initial term.

No definition available.

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- Definition

This amount represents the combined annual rent and service charges for the minimum range of initial term.

+ References

No definition available.

+ Details

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- Definition

Capital Lease Obligations, Interest Rate, Effective Percentage

+ References

No definition available.

+ Details

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- Definition

Lessee Leasing Arrangements, Capital Leases, Number of Renewal Options

+ References

No definition available.

+ Details

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- Definition

Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Represents percentage of building area agreed to lease from the landlord.

+ References

No definition available.

+ Details

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Namespace Prefix:	klic_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Area of land held.

+ References

No definition available.

+ Details

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Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- 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

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Data Type:	xbrli:stringItemType
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Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Present value of minimum lease payments for sale-leaseback transactions accounted for using the deposit method or as a financing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- Details

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DEBT AND OTHER OBLIGATIONS (Narrative) (Details)		12 Months Ended
DEBT AND OTHER OBLIGATIONS (Narrative) (Details)	Mar. 21, 2016 USD ($)	Sep. 30, 2017 USD ($) renewal_option	Oct. 01, 2016 USD ($)	Dec. 01, 2013 USD ($) ft²	Nov. 22, 2013 USD ($)
Debt Instrument [Line Items]
Area of Land \| ft²				198,000
Percentage Of Building Area Agreed To Lease From Landlord				70.00%
Financing obligation		$ 16,074,000	$ 16,701,000	$ 20,000,000
K&S Corporate Headquarters [Member]
Debt Instrument [Line Items]
Lessee Leasing Arrangements, Capital Leases, Renewal Term		10 years
Annual Rent and Service Charge Minimum Range		$ 4,000,000
Annual Rent and Service Charge Maximum Range		$ 5,000,000
Lessee Leasing Arrangements, Capital Leases, Term of Contract		10 years
Lessee Leasing Arrangements, Capital Leases, Number of Renewal Options \| renewal_option		2
Capital Lease Obligations, Interest Rate, Effective Percentage		6.30%
Building [Member]
Debt Instrument [Line Items]
Property, Plant and Equipment, Useful Life		25 years
Citibank [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					$ 5,000,000
Long-term Line of Credit		$ 3,200,000
Revolving Credit Facility [Member] \| United Overseas Bank Limited [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Expiration Date	Mar. 20, 2018
Line of Credit Facility, Maximum Borrowing Capacity	$ 25,000,000
Line of Credit Facility, Expiration Period	1 year
Long-term Line of Credit		0
Current and Noncurrent Portion [Member]
Debt Instrument [Line Items]
Financing obligation		$ 16,800,000