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GOODWILL AND INTANGIBLE ASSETS (Net intangible assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 19, 2021
Oct. 01, 2022
Oct. 02, 2021
Finite-Lived Intangible Assets [Line Items]      
Net intangible assets   $ 31,939 $ 42,752
In-process research and development      
Finite-Lived Intangible Assets [Line Items]      
Net intangible assets   $ 0 8,795
Average estimated useful lives (in years)   6 years  
Finite-Lived Intangible Assets, Period Increase (Decrease)   $ (7,900)  
Developed technology      
Finite-Lived Intangible Assets [Line Items]      
Gross intangible assets   89,017 90,427
Accumulated amortization   (58,636) (58,494)
Net intangible assets   30,381 31,933
Finite-Lived Intangible Assets, Period Increase (Decrease)   7,900  
Customer relationships      
Finite-Lived Intangible Assets [Line Items]      
Gross intangible assets   33,515 36,114
Accumulated amortization   (33,515) (36,114)
Net intangible assets   0 0
Trade and brand name      
Finite-Lived Intangible Assets [Line Items]      
Gross intangible assets   6,945 7,374
Accumulated amortization   (6,945) (7,275)
Net intangible assets   0 99
Other intangible assets      
Finite-Lived Intangible Assets [Line Items]      
Gross intangible assets   4,700 4,700
Accumulated amortization   (3,142) (2,775)
Net intangible assets   $ 1,558 $ 1,925
Other intangible assets | Uniqarta      
Finite-Lived Intangible Assets [Line Items]      
Estimated useful life 6 years    
Minimum | Developed technology      
Finite-Lived Intangible Assets [Line Items]      
Average estimated useful lives (in years)   6 years  
Minimum | Customer relationships      
Finite-Lived Intangible Assets [Line Items]      
Average estimated useful lives (in years)   5 years  
Minimum | Trade and brand name      
Finite-Lived Intangible Assets [Line Items]      
Average estimated useful lives (in years)   7 years  
Minimum | Other intangible assets      
Finite-Lived Intangible Assets [Line Items]      
Average estimated useful lives (in years)   1 year 10 months 24 days  
Maximum | Developed technology      
Finite-Lived Intangible Assets [Line Items]      
Average estimated useful lives (in years)   15 years  
Maximum | Customer relationships      
Finite-Lived Intangible Assets [Line Items]      
Average estimated useful lives (in years)   6 years  
Maximum | Trade and brand name      
Finite-Lived Intangible Assets [Line Items]      
Average estimated useful lives (in years)   8 years  
Maximum | Other intangible assets      
Finite-Lived Intangible Assets [Line Items]      
Average estimated useful lives (in years)   6 years