DOCUMENT AND ENTITY INFORMATION - USD ($) $ in Millions	12 Months Ended
	Oct. 01, 2022	Nov. 14, 2022	Apr. 02, 2022
Entity Addresses [Line Items]
Entity Registrant Name	KULICKE AND SOFFA INDUSTRIES, INC.
Document Type	10-K/A
Document Annual Report	true
Document Transition Report	false
Amendment Flag	true
Document Period End Date	Oct. 01, 2022
Entity File Number	000-00121
Entity Central Index Key	0000056978
Entity Incorporation, State or Country Code	PA
Entity Address, Address Line One	23A Serangoon North Avenue 5
Entity Address, Address Line Two	#01-01
Entity Address, Country	SG
Entity Address, Postal Zip Code	554369
City Area Code	215
Local Phone Number	784-6000
Title of 12(b) Security	Common Stock, Without Par Value
Trading Symbol	KLIC
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 3,279.6
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Tax Identification Number	23-1498399
ICFR Auditor Attestation Flag	true
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Entity Common Stock, Shares Outstanding		57,018,988
Entity Address, City or Town	Singapore
Current Fiscal Year End Date	--10-01
Amendment Description	Kulicke and Soffa Industries, Inc. (the “Company”, “we”, “us”, “our” or “K&S”) is filing this Amendment No. 1 on Form 10-K/A (this “Amendment” or “Form 10-K/A”) to our Annual Report on Form 10-K for the fiscal year ended October 1, 2022, which was filed with the U.S. Securities and Exchange Commission (the “SEC”) on November 17, 2022 (the “Original Form 10-K”) to make certain changes as described below.During the third quarter of fiscal year 2023, in response to comment letters from and ongoing discussions with the staff of the SEC, the Company reconsidered the guidance under ASC 280, Segment Reporting, and determined that certain prior period conclusions about the Company’s operating and reportable segments were erroneous. As a result, the Company had incorrectly presented certain segment-related disclosures in the notes to our previously issued consolidated financial statements, included in the Original Form 10-K. In light of the foregoing, management reassessed the effectiveness of the Company’s internal control over financial reporting as of October 1, 2022, based on the framework established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). As a result of that reassessment, management identified a material weakness related to the Company’s segment reporting and, accordingly, concluded that our disclosure controls and procedures were not effective as of October 1, 2022 and that the Company did not maintain effective internal control over financial reporting as of October 1, 2022. A “material weakness” is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of the Company's annual or interim financial statements will not be prevented or detected on a timely basis. The Company is filing this Amendment to the Original Form 10-K for the purpose of amending the Original Form 10-K to: (i) amend Part II, Item 8 “Financial Statements and Supplementary Data” to reissue the Report of Independent Registered Public Accounting Firm as it pertains to PricewaterhouseCoopers LLP’s (“PwC”) opinion on the effectiveness of the Company’s internal control over financial reporting (“ICFR”) as of October 1, 2022; and (ii) amend and restate Part II, Item 9A “Controls and Procedures” of the Original Form 10-K to reflect management’s conclusion that the Company’s ICFR and disclosure controls and procedures were not effective as of the October 1, 2022 due to the material weakness in ICFR, and to describe the Company’s remediation plan for addressing such material weakness.As required by Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), the Company has included the entire text of Part I, Item IA, Part II, Item 7, Part II, Item 8, Part II, Item 9A of the Original Form 10-K in this Amendment. However, there have been no changes to the text of such items other than the amendments as stated in the immediately preceding paragraph, and as further discussed below. The Company has evaluated the materiality of the incorrect presentation of its segment-related disclosures in the notes to its consolidated financial statements and has concluded that it did not result in a material misstatement of the Company’s previously issued consolidated financial statements. Notwithstanding the above, the Company has determined that it would revise its notes to the consolidated financial statements to correct the presentation of its segment-related disclosures and will additionally: (i) amend Part II, Item 7 “Management's Discussion and Analysis of Financial Condition and Results of Operations” to revise the segment-related information within the “Results of Operations”; and (ii) revise segment-related information in Note 4: Goodwill and Intangible Assets and Note 16: Segment Information.The Company’s principal executive officer and principal financial officer are providing new currently dated certifications. In addition, the Company is filing a new consent from PwC. Accordingly, this Amendment amends Items 15 “Exhibits, Financial Statement Schedules” in the Original Form 10-K to reflect the filing of the new certifications and consent. Except as specifically noted above, this Amendment does not reflect events that occurred subsequent to the filing of the Original Form 10-K, nor does it modify or update disclosures in the Original Form 10-K in any way. Among other things, risk factors and forward-looking statements made in the Original Form 10-K have not been revised to reflect events that occurred or facts that became known to the Company after the filing of the Original Form 10-K, and any such forward looking statements should be read in their historical context. Accordingly, this Amendment should be read in conjunction with the Company’s other filings made with the SEC subsequent to the filing of the Original Form 10-K.
Principal Executive Offices
Entity Addresses [Line Items]
Entity Address, Address Line One	1005 Virginia Dr.
Entity Address, Postal Zip Code	19034
Entity Address, State or Province	PA
Entity Address, City or Town	Fort Washington