v3.25.1
DOCUMENT AND ENTITY INFORMATION - shares
 6 Months Ended
Mar. 29, 2025
May 02, 2025
Entity Addresses [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 29, 2025  
Document Transition Report false  
Entity File Number 0-121  
Entity Registrant Name KULICKE AND SOFFA INDUSTRIES, INC.  
Entity Incorporation, State or Country Code PA  
Entity Tax Identification Number 23-1498399  
Entity Address, Address Line One 23A Serangoon North Avenue 5  
Entity Address, Address Line Two #01-01,  
Entity Address, City or Town Singapore  
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 Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   52,769,348
Entity Central Index Key 0000056978  
Current Fiscal Year End Date --10-04  
Amendment Flag false  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2025  
Principal Executive Offices    
Entity Addresses [Line Items]    
Entity Address, Address Line One 1005 Virginia Dr.  
Entity Address, City or Town Fort Washington  
Entity Address, Postal Zip Code 19034  
Entity Address, State or Province PA