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GOODWILL AND INTANGIBLE ASSETS (Net intangible assets) (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Oct. 01, 2022
Finite-Lived Intangible Assets [Line Items]    
Net intangible assets $ 29,357 $ 31,939
In-process research and development    
Finite-Lived Intangible Assets [Line Items]    
Net intangible assets 459 0
Developed technology    
Finite-Lived Intangible Assets [Line Items]    
Gross intangible assets 80,959 89,017
Accumulated amortization (55,877) (58,636)
Impairment charges (6,900)  
Net intangible assets 25,082 30,381
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross intangible assets 36,764 33,515
Accumulated amortization (34,789) (33,515)
Net intangible assets 1,975 0
Trade and brand name    
Finite-Lived Intangible Assets [Line Items]    
Gross intangible assets 7,130 6,945
Accumulated amortization (7,130) (6,945)
Net intangible assets 0 0
Other intangible assets    
Finite-Lived Intangible Assets [Line Items]    
Gross intangible assets 5,617 4,700
Accumulated amortization (3,776) (3,142)
Net intangible assets $ 1,841 $ 1,558
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  
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) 8 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) 8 years