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GOODWILL AND INTANGIBLE ASSETS (Net intangible assets) (Details) - USD ($)
$ in Thousands
Dec. 28, 2024
Sep. 28, 2024
Schedule Of Intangible Assets [Line Items]    
Gross Carrying Amount $ 130,089 $ 134,374
Accumulated Amortization (107,287) (109,135)
Net Amount 22,802 25,239
In-process research and development    
Schedule Of Intangible Assets [Line Items]    
Gross Carrying Amount 459 459
Accumulated Amortization 0 0
Net Amount 459 459
Developed technology    
Schedule Of Intangible Assets [Line Items]    
Gross Carrying Amount 80,364 83,401
Accumulated Amortization (60,801) (61,575)
Net Amount $ 19,563 21,826
Developed technology | Minimum    
Schedule Of Intangible Assets [Line Items]    
Average estimated useful lives (in years) 6 years  
Developed technology | Maximum    
Schedule Of Intangible Assets [Line Items]    
Average estimated useful lives (in years) 15 years  
Customer relationships    
Schedule Of Intangible Assets [Line Items]    
Gross Carrying Amount $ 36,554 37,625
Accumulated Amortization (34,912) (35,916)
Net Amount $ 1,642 1,709
Customer relationships | Minimum    
Schedule Of Intangible Assets [Line Items]    
Average estimated useful lives (in years) 5 years  
Customer relationships | Maximum    
Schedule Of Intangible Assets [Line Items]    
Average estimated useful lives (in years) 8 years  
Trade and brand name    
Schedule Of Intangible Assets [Line Items]    
Gross Carrying Amount $ 7,095 7,272
Accumulated Amortization (7,095) (7,272)
Net Amount $ 0 0
Trade and brand name | Minimum    
Schedule Of Intangible Assets [Line Items]    
Average estimated useful lives (in years) 7 years  
Trade and brand name | Maximum    
Schedule Of Intangible Assets [Line Items]    
Average estimated useful lives (in years) 8 years  
Other intangible assets    
Schedule Of Intangible Assets [Line Items]    
Gross Carrying Amount $ 5,617 5,617
Accumulated Amortization (4,479) (4,372)
Net Amount $ 1,138 $ 1,245
Other intangible assets | Minimum    
Schedule Of Intangible Assets [Line Items]    
Average estimated useful lives (in years) 1 year  
Other intangible assets | Maximum    
Schedule Of Intangible Assets [Line Items]    
Average estimated useful lives (in years) 8 years